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Sr. No.

Particulars

Page Number

1 Scheme and Syllabus

2 Assignments

3 Question Bank

4 Mid Question Paper

5 GTU Question Papers

Electrification of Building Complexes Course Code 3360908

GTU/ NITTTR Bhopal/14-15 Gujarat State

1

GUJARAT TECHNOLOGICAL UNIVERSITY, AHMEDABAD

COURSE CURRICULUM

COURSE TITLE: ELECTRIFICATION OF BUILDING COMPLEXES

(COURSE CODE: 3360908)

Diploma Programme in which this course is offered

Semester in which offered

Electrical Engineering Sixth

1. RATIONALE

With the revolutionary changes in the building construction, advent of new building materials

and electrical fittings and accessories there is an increase in demand for specialists in

electrification of high rise-multistoried building and commercial complexes. Therefore a

limited exposure to electrification of small building is not sufficient and this subject needs to

be taught as a specialized subject. This course will provide knowledge about electrification of

high rise buildings and complexes. Studying this course will enable the diploma pass outs to

plan, design, and estimate and execute the electrification of multistoried buildings and

commercial complexes independently and professionally as per IE rules. If proper skills are

developed then pass outs may start their own business of electrification of building

complexes, which is very profitable and growing business and requires very less investment.

2. COMPETENCY

The course content should be taught and implemented with the aim to develop different types

of skills so that students are able to acquire following competency:

Applying IE rules, undertake the electrification of multistory buildings and

commercial complexes.

3. COURSE OUTCOMES

The theory should be taught and practical should be undertaken in such a manner that students

are able to acquire different learning outcomes in cognitive, psychomotor and affective

domains to demonstrate the following course outcomes:

i. Interpret plan and wiring diagrams of electrification of buildings and complexes.

ii. Calculate the average and peak power requirement of building complexes.

iii. Test a given wiring installation of a building and prepare test report.

iv. Test wiring installation of a multistoried building and commercial complexes.

v. Estimate the materials and cost of electrification for different buildings.

vi. Test the safety devices in a multistoried building and commercial complexes.

.

4. TEACHING AND EXAMINATION SCHEME

Teaching Scheme

(In Hours)

Total Credits

(L+T+P)

Examination Scheme

Theory Marks Practical

Marks

Total Marks

L T P C ESE PA ESE PA

150 3 0 2 5 70 30 20 30

Legends: L-Lecture; T – Tutorial/Teacher Guided Theory Practice; P - Practical; C – Credit, ESE - End

Semester Examination; PA - Progressive Assessment.



2

5. COURSE CONTENT DETAILS

Unit Major Learning Outcomes

( in Cognitive Domain) Topics and Sub-topics

Unit – I.

Elements of

Electrification

1a. Interpret different electrical

engineering drawings of an

electrical installation.

1b. Measure and verify current,

earthing resistance , insulation

resistance and continuity of a

wiring installation as per IS.

1c. Describe the safety tests as per

IS.

1d. Calculate illumination

requirements.

1.1 of Electrical installation

1.2 Reading and Interpretation of

Electrical Engineering Drawings,

diagrams, plans and layout

1.3 Testing of wiring Installation for

verification of current, earthing

resistance, insulation resistance and

continuity as per IS

1.4 Preparation of testing/supervisory

report

1.5 Selection of electrical accessories

such as main cable, main switches

circuit breakers etc.

1.6 Illumination requirements in high

rise, Commercial and public

Building

1.7 Economical illumination design

Unit– II

Electrification

of

Multistoried

Buildings

2a. Prepare wiring layout of

Electrical installation.

2b. Calculate total load on

electrical distribution work.

2c. Prepare specification of wiring

material and accessories

required for an electrical

installation.

2d. Estimate floor wise electrical

material requirements.

2.1 Wiring layout of an electrical

installation

2.2 Type of wiring- Concealed /Surface

conduit etc

2.3 Calculate number of sub circuits

from the total circuit requirement

2.4 Calculation total electrical load on

distribution work

2.5 Floor wise estimation of material

requirements

i. Specification of wiring material

and accessories.

ii. Estimation of total cost of

electrification using schedule of

rates (SOR).

iii. Case Studies

2.6 Requirements of approval from

electrical inspection for high rise-

multistoried building

2.7 Load calculation for lifts,

escalators, air conditioners: wiring

diagram, Case studies(Problems)

Unit– III

Electrification

of

Commercial

Complexes

and Public

Buildings

3a. Interpret Installation drawing

and layout of electrical wiring

of a commercial complex.

3b. Differentiate between

electrification of Residential

and commercial Installation.

3c. Calculate Load specification

3.1 Concept of commercial Installation

3.2 Comparison of Residential and

commercial Installation

3.3 Fundamental considerations for

planning of an electrical

installation system for

commercial/Public building



3



for service connection and

nature of supply.

3d. Calculate the correct size of

cables, bus bar and bus bar

chambers.

3e. Select appropriate mounting

arrangements and positioning

of switchboards, distribution

boards, main switch, type of

wire and wiring system.

3f. Estimate the cost of

electrification of commercial

installation.

3.4 Special requirements of hotels,

theaters, library and cultural halls

etc. from electrification points of

view

3.5 Estimating and Costing of material

and total cost of electrification of

commercial complexes and Public

buildings

Unit – IV

Distribution

System for

Multistoried

Buildings

4a. Prepare drawing and layout

for an underground service

connection.

4b. Calculate Load specifications

for an underground service

connection of multistoried

buildings.

4c. Calculate the size of bus bar,

cables, panels, wiring system,

type of wire

4d. Decide Mounting

arrangements and positioning

of switchboards, distribution

boards main switch etc.

4e. Estimate the cost of

multistoried buildings.

4.1 Different Methods of service

connection

4.2 Incoming supply to substation for

multistoried high rise buildings

(building height more than 15m.)

4.3 Distribution panels and bus bar

system

4.4 Meter connection-bifurcation of

metering-meters as per consumers

demand, use of digital – meters for

prevention of theft of power

4.5 Cable laying in building, special

precautions

4.6 Estimating and costing of

electrification of underground

service connection of multistoried

building.

Unit – V

Electrical

Safety and IE

Rules

5a. Highlight the significance of

safety rules to be followed in a

Multistoried building.

5b. Conduct safety tests as per IE.

5c. Maintain various safety

devices in multistoried

buildings.

5d. Maintain Diesel Generator

set as a stand by unit.

5.1 Importance of safety rules.

5.2 Safety precaution in electrical

installation of multistoried

buildings

i. Fire alarm system

ii. Smoke detection system

iii. Safety for lifts and escalators

iv. Earthing system (IE rules

regarding safety)

v. Lightening arrestors

arrangements

vi. Use of ELCB and MCB in an

installation

vii. Electronic safety locks at the

entrance

5.3 Use of National Building Code



4



(electrical service ) for safety

5.4 Use of D.G. set as a standby power

supply in case of emergency.

5.5 IE rules related to Electrical

Installation and Testing

6. SUGGESTED SPECIFICATION TABLE WITH HOURS and MARKS

(THEORY)

Unit

No.

Unit Title Teaching

Hours

Distribution of Theory Marks

R

Level

U

Level

A

Level

Total

Marks

I Elements of Electrification 6 3 3 3 09

II Electrification of Multistoried

Buildings 10 5 6 6 17

III Electrification of Complexes

and Public Buildings 10 5 6 6 17

IV Distribution System for

Multistoried Buildings. 10 5 6 6 17

V Electrical Safety and I.E. rules 6 3 3 4 10

Total 42 21 24 25 70

Legends: R = Remember; U = Understand; A = Apply and above levels (Bloom’s revised

taxonomy)

Note: This specification table shall be treated as a general guideline for students and teachers.

The actual distribution of marks in the question paper may vary slightly from above table.

7. SUGGESTED EXERCISES/PRACTICALS

The practical should be properly designed and implemented with an attempt to develop

different types of skills (outcomes in psychomotor and affective domain) so that students

are able to acquire the competencies/programme outcomes. Following is the list of practical

exercises for guidance.

Note: Here only outcomes in psychomotor domain are listed as practical. However, if these

practical are completed appropriately, they would also lead to development of certain

outcomes in affective domain which would in turn lead to development of Course Outcomes

related to affective domain. Thus over all development of Programme Outcomes (as given in

a common list at the beginning of curriculum document for this programme) would be

assured.

Faculty should refer to that common list and should ensure that students also acquire

outcomes in affective domain which are required for overall achievement of Programme

Outcomes/Course Outcomes.



5

S.

No.

Unit

No.

Practical Exercises

(Outcomes in Psychomotor Domain)

Approx.

Hrs.

required

1

II Draw a complete wiring diagram, of any one of the commercial

complexes. (Cinema, hotel, library, cultural hall, hospital etc. A

group of 5 students, having one different complex –per group.

4

2 III Interpret and prepare electrical test report of a large building or

complex. 2

3 III Calculate load, draw wiring diagram and estimate cost of any

given high rise building. 4

4 I Design Economical illumination system for any complex, building. 4

5 V Testing of safety Devices in electrical installation in a high rise

building. 4

6

II Calculate Load for lift, escalators, air conditioning in high rise

building. (A group of 5 students, having one different complex per

group.)

4

7 V Prepare field visit report (Important observations) of any high-rise

building or Complex for electrical installation and wiring. 2

8

I and

V

Perform electrical tests for commercial and high rise buildings as

per IE.

4

Total Hours 28

8. SUGGESTED STUDENT ACTIVITIES

Following is the list of proposed student activities:

i. Prepare journals based on practical performed in laboratory.

ii. Assignments on solving numerical

iii. Assignments of case studies

iv. Analyze the standard specifications of various electrical accessories and fittings.

v. Make comparative table of different types of wiring installations.

vi. Prepare a sample test report based on test carried out on an installation

vii. Visit to see the electrification of large multistoried building or commercial building

complex

9. SPECIAL INSTRUCTIONAL STRATEGIES (if any)

i. Arrange lectures by ‘A’ class contractors engaged in electrification works of building

complexes.

ii. Arrange a visit to a complex, multistory building under construction where

electrification work is in progress.

iii. Show video/animation film to demonstrate the different types of wiring and

installations

iv. Carry out a survey and prepare a report on different type of cables, their sizes and

modern electrical accessories and fittings available in local market

v. Use Flash/Animations to explain the working of different electrical safety devices.

vi. Give Mini projects (such as planning and estimating of electrification of given

building complex) to students.



6

10. SUGGESTED LEARNING RESOURCES

A) Books

S.

No. Title of Book Author Publication

1. Electrical Design

Estimation and Costing

Raina K.B.

Bhattacharya S.K.

Willet Estern Ltd., Latest edition

2. Electrical Estimation and

Costing

Uppal S.L. Khanna Publisher, New Delhi,

Latest edition

3.

India Electrical Rules

1956 Hand book

Chudley R. Butterworth –London

New Delhi. Latest Edition, Latest

edition

4.

National Building code

of India Group 1 and

Group 4

Bureau of Indian

standard

New Delhi, Book no. 1604,Latest

Edition

5.

A Course in Electrical

Installation, Estimating

and Costing

Gupta J.B. S.K. Kataria and Sons, Latest

edition

B) Major Equipment/Instruments with Broad Specifications

1. Digital Multimeter 2. Clip-on meter

3. MEGGAR

4. EARTH TESTER

5. MULTIMETER

6. Basic wiring tools Pliers, Screw drivers and nut drivers ,Wire

strippers , Utility Knife, Fishing tools,

Measuring devices, Labeling machines, Power

drills and drivers, hammer/drills, Power saws

C) Software/Learning Websites

i. www.nptel.iitm.ac.in

ii. http://www.edumedia-sciences.com

iii. www.youtube

iv. http://electrical-engineering-portal.com/

11. COURSE CURRICULUM DEVELOPMENT COMMITTEE

Faculty Members from Polytechnics

Prof. V. R. Kotdawala, L.E.E, Government Polytechnic, Himmatnagar

Prof. A. A. Amin, L.E.E, Government Polytechnic, Vadnagar

Coordinator and Faculty Members from NITTTR Bhopal

Dr. (Mrs.) C.S. Rajeshwari, Professor, Department of Electrical and Electronics

Engineering,

Prof. A. S. Walkey, Associate Professor, Department of Electrical and Electronics

Engineering,

http://jainbookagency.com/newdetails.aspx?id=95169



http://jainbookagency.com/booksearch.aspx?aname=J.B.Gupta

http://www.nptel.iitm.ac.in/

http://www.youtube/

http://electrical-engineering-portal.com/

Academic

Laxmi Institute of Technology, Sarigam

Diploma Electrical Department

Year: 2018-19 ASSIGNMENT: 1

Name of Subject : E.B.C. Date:

Subject Code : 3360908

Chapter/Unit: 1 Elements of Electrification

Sr. No.

Name of Question Remarks

1. Draw symbols of give below 1)celling fan 2) lamp 3) fluorescent camp 4) bell 5) exhaust fan

2. How to choose correct size of main cables & switches for a particular load ?

3. Explain the method of testing of inoulation (all) resistance between conductors as par is

4. Explain the importance of test report for any electrical installation

5. Write illumination level required for 1)kitchen 2) library 3) tennish court 4) rending room 5) bath room 6) strightlight 7) drawing room 8) workshop 9) lecture hall

6. What are the factors to be considerd for good illumination design

7. Explain classification of electrical installation

8. Explain general requirements of electrical installation

Date of Submission:-

Name & Sign of Subject In-charge:Nimesh Lad

Academic






Chapter/Unit: 2 Electrification of multistoried building

Sr. No.


1. Why approval from electrical inspector is required for high rise multistored building ? Explain

2. How electrical load of lift and air conditioner& escalators is added in electrification of high rise building ? explain

3. How S.O.R. useful in estimation of total cast of electrification?

4. Write importance of blue print of the electrification wiring layout circulation building complexes

5. Why surface or concelled conduit wiring is used in high rise building ?

6. List the types of domestic wiring & explain conduit wiring system

7. How to deciding the number of sub circuits from total load requirements ?

8. Explain specification of wiring material and accessories



Academic






Chapter/Unit: 3 Electrification of complexes &public buildings

Sr. No.


1. Compare electrification of residential & commercial building installation

2. Explain special requirements of theatre &cultural hall lighting from electrification paint of view

3. Explain special requirements of hotel &hospital lighting from electrification point of view

4. Define commercial installation state different types of commercial installation

5. Explain design consideration of electrical installation in commercial building

6. What are the fundamental consideration for planning of commercial electrical installations

7. Explain special requirements for library buildings

8. Explain determination of the total cost of the electrification of building complex

9. Explain costing of electrical wiring installation for commercial buildings

Explain estimation of material requirements for the electrification of building complexes



Academic






Chapter/Unit: 4 Distribution System for multistoried building

Sr. No.


1. State & explain different methods of cable laying

2. Explain special precautions to be taluen in cable laying

3. Explain underground service connection used in multistoried building

4. Explain how theft of power at consumer’s premises is prevented

5. Explain different types of metering arrangement in multistoried building as per consumer demand

6. Explain salient features of digital energy meter

7. Draw & explain line diagram of pole mounted distribution substation

8. Explain busbar chamber for power distribution

9. Explain construction of panel board

10. Explain construction of technical aspects while estimating underground service line



Academic






Chapter/Unit: 5 Electrical safety & IE rules

Sr. No.


1. Draw and explain wiring of fire alarm circuit

2. Write a short note on ELCB

3. Explain use of D.G. set as a standby power supply in case of emergency

4. State & explain safety devices used in lift

5. Explain electronic safety lock use at entrance of commercial complex

6. Write IE rule related to commercial complexes

7. State & explain the importance of sofety rules as per IE applied to multistoried building

8. Explain smoke detection system in large building complex

9. Write a short notes on use of MCB in electrification of large building & complexes



Academic



Year: 2018-19 TUTORIAL: 1



Sr. No.

Name of tutorial Remarks

1.

An office 30m 15m is illuminated by 40w fluorescent lamps of lumen output 2700 lumens the average illumination required at the work place is 200 lux calauate the number of lamps required to be fitted in office Assume co-efficient of utilization to be 0.6 & depreciation factor 1.25 ( may 2016 )

2.

A computer lab 20m consists of following loads 1)light point = 20 2) fan point = 14 3) 3 amp socket = 6 4) computer points = 50 5) AC 1.5t =8 Calculate : 1) total load 2) total current 3) no of sub circuit 4) size of wire & cable 5) size of D.B. ( DEC -2015 )

3.

An assembly hall of a factory 30m x 15m x 5m size is illuminated by a twin 40 watt flurocont tube fixtures having a total lumen o/p of 5200 lumens the tube fixtures are mounted at the height of 3.5m form the work place average illumination level required on work place is 220 lux calculate (1) no of fixtures required Assume co-efficient of utilization 0.6 & maintenance factor = 0.8



Academic






Sr.

No. Name of tutorial Remarks

1. Prepare a list of material & estimate the cost of providing service connection to a single storey building at 240v. single phase 50hz. having a light & fan load of 5kw. The supply is t be given from a overhead line 20m. away from the building

2.

Estimate the quantity of material & cost for providing connection to a double storeyed building with a load of 4kw at 240v,50hz. Separate meters to be provided for the two floors. The distance between pole and building is 12m. and between service bracket and service board is 10m.

3.

A building ha s a load of 1 kw at 240v,50hz,1 phase& is situated At a distance of 30m. from an existing overhead pole. Draw a sketch of wiring & estimate the quantity of material with cost required for giving the service connection to the building. Following data may be used. a) Minimum size of all aluminium conductor -3/3.00mm for overhead line. b) GI pipe 32mm diameter, heavy gauge. c) 2-core weatherproof, aluminium core- 4 mmsq..60v grade. d) Earth wire- GI 8SWG weighing 1 kg per 10metres.

4.

A farmer neede to connect a 3- phase 37 kw,415v, 50 hz motor to a 3- phase. 4-wire, 415/240 v,50hz Overhead line. The distance of the service line from the structure having motor is 15m. The motor has an efficiency of 85% & power factor of 0.8. estimate the quantity &cost of the material required.

5.

A tubewell owner wants 3- phase, 4 wire power connection to his 10hp motor from the pole of 400v, 3- phase 50hz overhead line at a distance of 200m. from the tubewell. Make a sketch showing the arrangement of supply & estimate the quantity & cost of the material required.


Name & Sign of Subject In-charge: Nimesh Lad

Academic






Sr. No. Name of tutorial Remarks

1. A room of size of 15*6m. is to be illuminated by 20200W. lamps. The mscp of each lamp is 250. Assume a depreciation factor1.2& utilisaton factor 0.6. find the average illumination produced on the floor.

2.

An illumination on the working plane of 7 flux is required in a room pf 72m.*15m.in size. The lamps are required to be hung 4m. above the work bench. Assuming a suitable space height ratio, a utilization actor of 0.5, a lamp efficiency of 14 lumens per watt & a candle power depreciation of 20% estimate the no., rating & disposition of lamps.

3.

Estimate the number and wattage of lamps which would be required to illumination a workshop space of 60*15m. by means of lamps mounted 5m. above the working plane. The average illumination required is about 100 flux, co-efficient of utilization=0.4, luminous efficiency 16 lumens per watt. Assume a space height of unity & a candle power depreciation of 20%.

4.

A hall of 30*15m. with ceiling height of 5m. is to be provided with a general illumination of 120lumens/msq. Taking a coefficient of utilization of 0.5& depreciation factor of 1.4, determine the no. of fluorescent tubes req., their spacing, mounting height & total wattage. Take luminous efficiency of fluorescent tube of 40 lumens per watt for 80 watt tubes

5.

A hall 30m. long &12 wide is to be illuminated & illumination req. is 50m. candles. 5 types of lamps having lumen outputs, as given below,are available: Watts 100 200 300 500 1000 Lumens 1615 3650 4700 9950 21500 Taking a depreciation factor of 1.3 & utilization co efficient of 0.5, calculate the number of lamps need in each case to produce req. illumination. Out of above 5 types of lamps select needed in each case most suitable type of & design a suitable scheme & make sketch showing ocation of lamps. Assume a suitable mounting height & calculate space height ratio of lamps.



LAXMI INSTITUTE OF TECHNOLOGY

DEPARTMENT OF DIPLOMA ELECTRICAL ENGINEERING

Question Bank

Subject Name- E.B.C. Subject Code- 3360908

1.Explain fire alarm system used in large building complexes.

2. Write sort note on smoke detection system in large building complexes.

Write a sort note on used of MCB and ELCB in electrification of multi stored building.

4. State how earthling is carried out for residential industrial and multy stored building as per IE rules.

5. State at least 10 important IE rules for carrying out wiring of multy stored building.

6. Explain protection of building againts lighting.

7. Explain IS specification regarding earthing of electrical installation.

8. Explain method of estimation of overhead service line connection.

9. Explain method of installation of underground service line connection.

10. Explain method of laying of underground cables.

11. Explain jointing of underground cables connection.

12. Write a sort note on service mains .

13. State and explain types of sub circuit used in wiring diagram.

14. Explain the location of out lets and control switches.

15. Explain location of main switched board distribution board.

16. Explain guidelines for installation of fittings.

17. Explain estimating and costing of electrical installations.

18. Explain permissible voltage drops and size of wires.

19. Explain different types of wirings in details.

20. Explain method of lighting calculation.

21. Explain determination of size of conductors.

22. Explain point to be considered in layout of wiring.

TUTORIAL 2---- METHOD OF LIGHTING CALCULATION

1. A room of size of 15*6m. is to be illuminated by 20200W. lamps. The mscp of each lamp is 250.

Assume a depreciation factor1.2& utilisaton factor 0.6. find the average illumination produced

on the floor.

2. An illumination on the working plane of 7 flux is required in a room pf 72m.*15m.in size. The

lamps are required to be hung 4m. above the work bench. Assuming a suitable space height

ratio, a utilization actor of 0.5, a lamp efficiency of 14 lumens per watt & a candle power

depreciation of 20% estimate the no., rating & disposition of lamps.

3. Estimate the number and wattage of lamps which would be required to illumination a workshop

space of 60*15m. by means of lamps mounted 5m. above the working plane. The average

illumination required is about 100 flux, co-efficient of utilization=0.4, luminous efficiency 16

lumens per watt. Assume a space height of unity & a candle power depreciation of 20%.

4. A hall of 30*15m. with ceiling height of 5m. is to be provided with a general illumination of

120lumens/msq. Taking a coefficient of utilization of 0.5& depreciation factor of 1.4, determine

the no. of fluorescent tubes req., their spacing, mounting height & total wattage. Take luminous

efficiency of fluorescent tube of 40 lumens per watt for 80 watt tubes

5. A hall 30m. long &12 wide is to be illuminated & illumination req. is 50m. candles. 5 types of

lamps having lumen outputs, as given below,are available:

Watts 100 200 300 500 1000

Lumens 1615 3650 4700 9950 21500

Taking a depreciation factor of 1.3 & utilization co efficient of 0.5, calculate the number of lamps

need in each case to produce req. illumination. Out of above 5 types of lamps select needed in

each case most suitable type of & design a suitable scheme & make sketch showing ocation of

lamps. Assume a suitable mounting height & calculate space height ratio of lamps.

TUTORIAL 1---- METHOD OF ESTIMATION OF UNDERGROUND SERVICE LINE CONNECTON.

1. Prepare a list of material & estimate the cost of providing service connection to a single

storey building at 240v. single phase 50hz. having a light & fan load of 5kw. The supply is t

be given from a overhead line 20m. away from the building

2. Estimate the quantity of material & cost for providing connection to a double storeyed

building with a load of 4kw at 240v,50hz. Separate meters to be provided for the two floors.

The distance between pole and building is 12m. and between service bracket and service

board is 10m.

3. A building ha s a load of 1 kw at 240v,50hz,1 phase& is situated

At a distance of 30m. from an existing overhead pole. Draw a sketch of wiring & estimate the

quantity of material with cost required for giving the service connection to the building.

Following data may be used.

(a) Minimum size of all aluminium conductor -3/3.00mm for overhead line.

(b) GI pipe 32mm diameter, heavy gauge.

(c) 2-core weatherproof, aluminium core- 4 mmsq..60v grade.

(d) Earth wire- GI 8SWG weighing 1 kg per 10metres.

4. A farmer neede to connect a 3- phase 37 kw,415v, 50 hz motor to a 3- phase. 4-wire,

415/240 v,50hz

Overhead line. The distance of the service line from the structure having motor is 15m. the

motor has an efficiency of 85% & power factor of 0.8. estimate the quantity &cost of the

material required.

5. A tubewell owner wants 3- phase, 4 wire power connection to his 10hp motor from the pole

of 400v, 3- phase 50hz overhead line at a distance of 200m. from the tubewell. Make a

sketch showing the arrangement of supply & estimate the quantity & cost of the material

required.

Laxmi Institute of Technology , Sarigam Approved by AICTE, New Delhi; Affiliated to Gujarat Technological University,

Ahmadabad

Academic Year 2018-19

Centre Code: 691 Examination : Mid-1 Exam Semester: VI

Branch: Electrical Date: 31/01/2019 Sub Code: 3360908

Sub: EBC Time: 10.30 am to 11.30 am Marks: 20

Q-1 Answer any Three. 6

1. Write classification of electrical installation.

2. Write illumination level required for library and kitchen.

3. Important of blue print of electrification wiring lat out.

4. Important of testing report.

5. How electrical load of lift and escalators is added in electrification high

rise building.

Q-2 Answer any Two. 6

(A) Explain General requirement of Electrical installation.

(B) Explain Selection of main cable, main switches, circuit breakers, etc.

(C) Explain specification of wiring material and accessories.

(D) Explain method of testing of wiring Installation as per IS. Any one.

Q-3 Answer any Two. 8

(A) What are the factors to be considered for good illumination design?

(B

) How to deciding the number of sub circuit for total requirements?

(C

) Why surface & concealed wiring is used in high rise building?

(D

) How SOR useful in estimation of total cost of electrification?

1/4

Seat No.: ________ Enrolment No.______________

GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER – VI• EXAMINATION – SUMMER 2016

Subject Code: 3360908 Date: 19 /05/2016 Subject Name: Electrification of Building Complexes Time: 10:30 AM to 01:00 PM Total Marks: 70 Instructions:

1. Attempt all questions. 2. Make Suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. Use of programmable & Communication aids are strictly prohibited. 5. Use of only simple calculator is permitted in Mathematics. 6. English version is authentic.

Q.1 Answer any seven out of ten. દશમાથી કોઇપણ સાતના જવાબ આપો. 14

1. State importance of blue print in any layout of installation. ૧. કોઇપણ �સોોલસનના ોલ-આઉ મા બલ િ ની ટની તા ોયો.

2. Define maintenance factor and depreciation factor. ૨. મલઇન ટનસ ટ� ટનલ ટ સસન ટ� ક ાર ા ત કો.

3. Why fuse is always provided in phase wire? Explain. ૩. �ઝ શા મા ટ હમલશા ટઇઝ વા મા �કવામા આવલછલ ? વણરવો.

4. Write I.E. rules for sub-circuit for light and power wiring. ૪. ોાઇ ટનલ પાવ વા �ન મા ટ સબ-સ�ક� મા ટના આઇ.ઇ. ન મો ોયો.

5. Why surface or concelled conduit wiring is used in high rise building?

૫. હાઇ ાઇઝ �બ�ન મા શામા ટ સ ટસ ટથવા કસી કડ વા �ન

વપા છલ?

6. Explain importance of bus-bar chamber in high rise electrical installation. ૬. હાઇ ાઇઝ ઇોલ�ટકો �નસોોલસન મા બસ-બા ચલમબ ની ટની તા

વણરવો.

7. Define commercial installation. State different commercial installation. ૭. કોમસ�ટો �નસોોલસન ક ાર ા ત કો. વવધ કોમસ�ટો �નસોોલસન

ોયો.

8. State different methods of cable laying. ૮. કટબો ોલ�ન મા ટ ની વવધ પધધતત ોયો.

9. State the use of MCB and ELCB. ૯. મ.સી.બી. તથા ઇ.ો.સી.બી. ના ઉપ ોન ોયો.

10. State the factors affecting utilization factor of lamps. ૧૦. ો�પ ના લ�ોાઇઝલશન ટ� નલ ટસ કતા પ�બળો ોયો.

Q.2 (a) Explain the method of testing of insulation resistance between conductors as per I.S.

03

પ�. ર (ટ) આઇ.સ. માણલ બલ ક� વરચલનો �સલોલસન તોધ ટસ કવાની ૦૩

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પધધત વણરવો. OR (a) Explain the importance of test report for any electrical installation. 03 (ટ) કોઇ પણ ઇોલ�ટકો �સોોલસન મા ટ ટસ ટપો ર ની ટની તા વણરવો. ૦૩ (b) An office 30 m X 15 m is illuminated by 40 W fluorescent lamps of lumen

output 2700 lumens. The average illumination required at the work place is 200 lux. Calculate the number of lamps required to be fitted in office. Assume coefficient of utilization to be 0.6 and depreciation factor 1.25.

03

(બ) ક 30m X 15m ની ત ટસ 2700 લમલન આઉ ધાવતી 40 Watt ની

ફ ોસ� ટબ ોાઇ થી કાસત કવામા આવલો છલ. વકર સથળ ઉપ જ ટ

વ ટજ ઇલમનલસન 200 lux છલ. ત ટસ મા જ ટ ો�પ ની સર ા શોધો.

કો-� સ ત લ�ોાઇઝલસન ની �કિમત 0.6 તથા ટ સસન ટ�

1.25 ધાો.

૦૩

OR (b) Write illumination level required for (1) kitchen (2) Library ( 3) Tennis court

(4) Reading room (5) Bath room 03

(બ) જ ટ ઇલમનલસન ોલવો ની �કિમત ોયો. (1) સો� (2) ોાઇબલટ (3)

ટ નસ કો ર (4) વાચન મ (5) બાથ મ

૦૩

(c) Why approval from electrical inspector is required for high rise-multistoried building ? Explain.

04

(ક) હાઇ ાઇઝ મટસોટ �બ�ન મા ટ ઇોલ�ટકો �સપલ� ની પવાનની ોલવી

શા મા ટ જ ટ છલ? વણરવો.

૦૪

OR (c) How electrical load of lift and air conditioner is added in electrification of

high rise building? Explain. 04

(ક) હાઇ ાઇઝ �બ�ન ના ઇોલ�ટ� કટશન મા �ોફ ટનલ કટસન નો

ઇોલ�ટકો કા કઇ ટતલ ઉમલશો? વણરવો.

૦૪

(d) Explain special requirements of theatre lighting from electrification point of view.

04

() ઇોલ�ટ� કટસન ના સદકર મા થ ોાઇ�ન મા ટ સપલસ ો જ ટ ાત

વણરવો.

૦૪

OR (d) Explain special requirements of hotel lighting from electrification point of

view. 04

() ઇોલ�ટ� કટસન ના સદકર મા હો ટો ોાઇ�ન મા ટ સપલસ ો જ ટ ાત

વણરવો.

૦૪

Q.3 (a) Compare electrification of residential and multi-storied /commercial building.

03

પ�. 3 (ટ) હટણાક ટનલ બ�માળટ/ક ાપટક �બ�ન ના ઇોલ�ટ� કટશન ની સયામણી

કો.

૦૩

OR (a) Explain rules to be observed in electrification of public building. 03

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(ટ) પબોીક �બ�ન ના ઇોલ�ટ� કટશન મા ટ ધ ાન મા ાયવા પતા ન મો

વણરવો.

૦૩

(b) Explain how size of bus-bar and bus-bar chamber is determined. 03 (બ) બસ-બા ટનલ બસ-બા ચલમબ ની સાઇઝ કઇ ટતલ નનટ કવામા આવલછલ તલ

વણરવો.

૦૩

OR (b) Explain design considerations of electrical installation in commercial

building. 03

(બ) ક ાપટક �બ�ન મા ઇોલ�ટકો �સોોલશન ટઝાઇન મા ટ જ ટ �ર

�દાત વણરવો.

૦૩

(c) Explain any one cable laying method in detail. 04 (ક) કોઇ પણ ક કટબો ોલ�ન પધધિ વસતા થી વણરવો. ૦૪ OR (c) Explain special precautions to be taken in cable laying. 04 (ક) કટબો ોલ�ન દમ ાન ોલવામા આવતી યાસ કાળ�ત વણરવો. ૦૪ (d) Explain low voltage distribution system in multistoried building. 04 () મટસોટ �બ�ન મા ટ ોો વો ટજ ટસટબલશન પધધિ વણરવો. ૦૪ OR (d) Explain under ground service connection used in multi storied building. 04 () મટસોટ �બ�ન મા ટ ઉપ ોન મા ોલવાતી � ગાર સવ�સ જોાણ

વણરવો.

૦૪

Q.4 (a) Explain how theft of power at consumer’s premises is prevented. 03 પ�. ૪ (ટ) ગાહક ના માઇસીસ મા પાવ ચોટ કઇ ટતલ ટકાવી શકા ? સમ�વો. ૦૩

OR (a) Explain different types of metering arrangement in multiplex building as per

consumers demand. 03

(ટ) ગાહક ની માનણી �જબ મટસોટ �બ�ન મા વવધ મી�ન ક વસથા

વણરવો.

૦૩

(b) Explain salient features of digital energy meter. 04 (બ) ટ�ો નજ� મી ના �ર ટચસર ોયો. ૦૪ OR (b) Draw and explain single line diagram of pole mounted distribution

substation. 04

(બ) પોો માઉન ટ ટસટબલશન સબ સ ટશન નો સિનો ોાઇન ા ાગામ દોો

ટનલ સમ�વો.

૦૪

(c) In a three storied polytechnic building following lighting arrangements are there: Floor Light points Fan Points 5 A Socket Ground floor 57 20 15 First floor 50 20 15 Second floor 50 20 15 Find: (1) Total load on each floor (2) Total load of installation.

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(3) Decide number of sub-circuit on each floor (4) Decide Mian cable size (5) Draw wiring circuit diagram for one sub-circuit.

(ક) ક તણ માળ ના પો�ો ટકનીક �બ�ડન મા નીચલ માણલ ોાઇ�ન ક વસથા

છલ. Floor Light points Fan Points 5 A Socket Ground floor 57 20 15 First floor 50 20 15 Second floor 50 20 15 ઉપો�ત �બ�ડન મા ટ: (1) દ ટક માળ મા ટ �ો કા

(2) �બ�ડન નો �ો કા

(3) દ ટક માળ મા ટ સબ-સ�ક� ની સર ા

(4) �ર કટબો ની સાઇઝ

(5) ક સબ-સ�ક� મા ટ વા �ન ા ાગામ

દોો.

૦૭

Q.5 (a) Draw and explain wiring of fire alarm circuit. 04 પ�. ૫ (ટ) ા ોામર સ�ક� � વા �ન દોો ટનલ વણરવો. ૦૪ (b) Explain about S.O.R. in detail. 04

(બ) સ.ત.આ. વશલ વસતા થી વણરવો. ૦૪ © Write short note on ELCB. 03

(ક) ELCB વશલ �ક નોધ ોયો. ૦૩ (d) Explain use of D.G. set as a standby power supply in case of emergency. 03 () ઇમજસીમા ટ.�. સલ નો ઉપ ોન સ ટન બા પાવ સ ોા તટકટ વણરવો. ૦૩

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GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER –VI • EXAMINATION – WINTER 2015

Subject Code: 3360908 Date: 10/12/2015 Subject Name: Electrification of building complexes Time: 02:30 PM TO 05:00 PM Total Marks: 70 Instructions:



1. What is mean by earth continuity conductor ૧. અથર કટ�ન�ટ� વાયર એટલ � ?

2. Define earth leakage current. State its permissible value ૨. અથર �લક�જ કરટ ની વયાખયા આપો. તમની પરિમિસબલ �ક�મત જણાવો.

3. State general requirement of electrical installation. ૩. ઇલ�કટરકલ �સટોલશન ની સામાનય જ��રયાત લખો.

4. What is difference between neutral and earth wire. ૪. ન�ટરલ અન અથર વાયર વચચ � તફાવત છ?

5. What are the advantages providing sub distribution board for large building? ૫. મોટા કોમપલકષ મા સબ �ડસટર�બ�શન બોડર આપવા ના ફાયદા જણાવો.

6. Why high rise multistory building require lightening arrestors? ૬. �ચા બ�માળ� મકાન મા લાઇ�િન�ગ એર�સટર ની � જ��રયાત છ?

7. Describe the function of cable route markers. ૭. ક�બલ �ટ માકરર � કાયર જણાવો.

8. State the factor affecting the earth registers. ૮. અથર ર�જસટસ ન અસર કરતા પ�રબળો લખો

9. List types of service connections. ૯. સિવ�સ લાઇન ના િવિવધ પરકાર જણાવો.

10. State factors consideration when deciding the number of sub circuits of commercial building.

૧૦. કોમિશ�યલ �બ�લડ�ગ મા સબસ�ક�ટ ન�� કરતી વખત �ા �દદા ધયાન મા

રાખવા જોઇય?

Q.2 (a) Draw wiring diagram , schematic diagram and single line diagram of stair case wiring.

03

પર�. ર (અ) દાદર વાયર�ગ માટ� નો વાયર�ગ ડાયાગરામ ,�સકમટ�ક ડાયાગરામ અન િસ�ગલ

લાઇન ડાયાગરામ દોરો.

૦૩

OR

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(a) Explain polarity test. 03 (અ) પોલા�રટ� ટ�સટ સમ�વો. ૦૩ (b) State which type of information is available from blue print. 03 (બ) બ� િપરનટ ઉપર થી કઇ મા�હતી મળ છ ત લખો. ૦૩ OR (b) Draw neat sketch for single phase sub distribution board for

1.lighting point 25 no. 2. fan point 16 no. 3. computer point 15 no. 4. 5 Amp socket 10 no.

03

(બ) િસ�ગલ ફ�ઝ સબ �ડસટર�બ�શન બોડર નો નીચ �જબ ના લોડર માટ� લ આઉટ

ડાયાગરામ બનાવો.

1) લાઇટ�ગ પો�ટ-25 નગ 2) ફ�ન પો�ટ -16 નગ

3) કોમપ�ટર પો�ટ-15 નગ 4) 5 એ�મપયર સોક�ટ -10 નગ

૦૩

(c) Write steps for estimation for internal electrification multistory building. 04 (ક) બ�માળ� મકાન ના �ટનરલ ઇલકટર��ફક�શન ના �દાજ માટ� ના સટ�પ લખો. ૦૪ OR (c) Explain the factor affecting the size of cable. 04 (ક) ક�બલ ની સાઇઝ ન અસર કરતા પ�રબળો સમ�વો. ૦૪ (d) Which factor should be considered for good illumination design? 04 (ડ) સારા ઇલ�િમનશન કરવા માટ� �ા પર�બળો ધયાન લવા જોઇય? ૦૪ OR (d) Explain escalator and its safety devices. 04 (ડ) એસક�લટર તથા તના સફટ� �ડવાઇસ સમ�વો. ૦૪ Q.3 (a) Prepare test report of electrical installation of complex building 03

પર�. 3 (અ) કોમલકષ �બ�લડ�ગ ના ઇલ�કટરક �સટોલશન માટ� નો ટ�સટ �રપોટર તયાર કરો. ૦૩ OR (a) Compare electrification of residential and multistory commercial building. 03 (અ) રહ�ણાક તથા બ�માળ� વા�ણ�ય સ�લ � ઇલકટર��ફક�શન સરખાવો. ૦૩ (b) State design consideration of electrical installation in commercial building. 03 (બ) વા�ણ�ય સ�લ મા ઇલ�કટરકલ �સટોલશન ની �ડઝાઇન માટ� ધયાન મા

રાખવાના �દદા લખો.

૦૩

OR (b) Draw neat sketch of three phase four wire distribution system with

connection of busbar. 03

(બ) બસબાર નો ઉપયોગ કર�ન તરણ ફ�ઝ ચાર વાયર �ડ�સટરબ�શન િસસટમ નો

િસ�ગલ લ આઉટ ડાયાગરામ દોરો.

૦૩

(c) List different type of electrical installation in hotel. 04 (ક) હોટ�લ મા િવિવધ ઇલ�કટરકલ �સટોલશન ના નામ જણાવો. ૦૪ OR (C) Write about smoke detection and Fire safety system in high rise building 04 (ક) બ�માળ� મકાન મા અ�ગન અન �માડો શોધવાની િસસટમ િવશ લખો. ૦૪ (d) State special requirements of cultural hall. 04

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(ડ) કલચરલ હોલ માટ� ની સપિશયલ જ�રયાત લખો. ૦૪ OR (d) Which are the factor to be consider for installation of building substation in

multistory building 04

(ડ) બ�માળ� મકાન મા સબસટ�શન ના �સટોલશન માટ� કઇ બાબતો ધયાન મા

રાખવી જોઇય

૦૪

Q.4 (a) Explain construction of panel board. 03 પર�. ૪ (અ) પનલ બોડર � કનશટરકશન સમ�વો. ૦૩

OR (a) Explain the term Equipment earthing and system earthing. 03 (અ) ઇ�કવપમ�ટ અથ�ગ અન િસસટમ અથ�ગ સમ�વો. ૦૩ (b) Explain busbar chamber for power distribution. 04 (બ) પાવર �ડ�સટરબ�શન માટ� બસબાર ચમબર સમ�વો. ૦૪ OR (b) State the different method of cable laying and explain any one. 04 (બ) ક�બલ ન લ�ગ કરવાની િવિવધ પદધિતઓ જણાવો. અન તમાથી કોઇ એક

સમ�વો.

૦૪

(c) A computer lab 20m X 10m consists of following loads: 1. Light point-20 no 2) Fan point -14 no 3. 5amp socket-6 no. 4) Computer point -50 no. 5. A.C 1.5 T-8 no.

Calculate 1) total load 2) total current 3) number of sub circuit 4) size of wire and cable 5) size of D.B.

07

(ક) 20મી. X 10 મી. કોમપ�ટર લબ મા નીચ �જબ નો લોડ છ.

1) લાઇટ પો�ટ-20 નગ (2) ફ�ન પો�ટ -14 નગ (3) 5 એ�મપયર સોક�ટ -6

નગ (4) કોમપ�ટર પો�ટ-50 નગ (5) એ.સી. 1.5 ટન.-8 નગ. આ માટ� નીચ

ની ગણતર� કરો.

1) �લ લોડ 2) �લ કરટ 3) સબ સ�ક�ટ ની સખયા 4) વાયર અન ક�બ� ની

સાઇઝ 5) ડ�.બી.ની સાઇઝ

૦૭

Q.5 (a) Explain the working principle of ELCB with suitable diagram. 04 પર�. ૫ (અ) ELCB ની કાયર પદધિત આ�િત સાથ સમ�વો. ૦4

(b) What is the necessity of DG set in commercial complex. 04 (બ) DG set ની વા�ણ�ય સ�લ મા જ��રયાત લખો. ૦4 (c) State name of safety devices used in lift. 03 (ક) �લફટ મા વપરાતા સફટ� �ડવાઇસ ના નામ લખો. ૦૩ (d) Explain electronic safety lock use at entrance of commercial complex 03 (ડ) વા�ણ�ય સ�લ ના પરવશ દવાર પર વપરાતા ઇલકટરોિનક સફટ� લોક સમ�વો. ૦૩

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GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER – VI • EXAMINATION – SUMMER 2015

Subject Code:3360908 Date:11-05-2015 Subject Name: Electrification of Building & Complexes Time: 10:30am to 1:00pm Total Marks: 70 Instructions:



1. Write specifications of Ceiling fan. ૧. છત મા લગાવવાના પખા ના સપપસસ�કકસન લખો.

2. Write specifications for “Cable” for approx. 50A load ૨. 50 એમપીીય લોો માાક જોોતા કકબલ ના સપપસસ�કકસન લખો.

3. What are the standard voltage available in the range 0V to 700kV. ૩. 0 થી 700 �ધી મા વપયાતા વૉલાકજ લખો.

4. What are the standard ratings of Switches available in the market? ૪. માક�ા મા મળતી �સવવ ના યક સાટગ જણાવો.

5. What do you mean by “Lug” w.r.t. cable ? ૫. કકબલ મા વપયાતી “લગ” � છપ?

6. Why multi stranded wire is used in electrification? ૬. ોલપ�ક�કકશન મા શા માાક એક કયતા વધાયક તાતણા વાળો વાય વપયાી છપ?

7. What should be the approx. value of illumination for Reading room and Street Light?

૭. અભીાસ ખો અનપ સા લાોા ના નસ ની દા ત સકમત જણાવો.

8. Draw symbols of Ceiling Fan & Lamp. ૮. સી�લટગ પખા અનપ લપમપ ના �વચનો દોયો.

9. What should be the potential between Neutral & Earthing wires? ૯. ચાયલ અનપ અયથથગ વાીય વવવપ વજવાય જણાવો.

10. What might be the reason for Sparking in Switches? ૧૦. �સવવ મા સપાસક�ગ થવાના કાયણો જણાવો.

Q.2 (a) Write three advantages of using DG Set as backup power over inverter? 03 પ�. ર (અ) ોચવાટયની સાપપપમા ોજલ જનયકાય સપા ના ણ �ાીદા જણાવો. ૦૩

OR (a) Define Bus bar. 03 (અ) બસ બાય ની વીાાીા લખો. ૦૩ (b) Name any six wiring tools. 03 (બ) કોો પણ છ વાીયથગ માાકના સાધન ના નામ લખો. ૦૩

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OR (b) How load balancing is achieved in multi storey building? 03 (બ) બ�માળ ોમાયત મા લોો બપલપચસ કો યતપ કયવામા આવપ છપ? ૦૩ (c) Write short note on Backup power system of any high rise building. 04 (ક) બ�માળ ોમાયતમા પાવય બપક-અપની વીવસથા કો યતપ કયવામા આવપ છપ? ૦૪ OR (c) Suggest Electrical safety measures for Lifts of high rise buildings. 04 (ક) બ�માળ ોમાયતમા �લફા મા ઇલપ�કકલ સલામત માાક શી વીવસથા

કયવામા આવપ છપ?

૦૪

(d) How lighting arrestors help safety in High rise buildings? 04 (ો) બ�માળ ોમાયતમા લાોાનટગ અયકસાય સલામતીમા કો યતપ મદદ કયક છપ? ૦૪ OR (d) What are the fundamental considerations required to note in planning

Commercial Electric Installation? 04

(ો) કોમશ�ીલ ોલપ�કક ોચસાોલપસન માાક � બાબતો ાીાનપ લપવાની યનક છપ ૦૪ Q.3 (a) How to choose correct size of a cable for a particular load? 03

પ�. 3 (અ) કોો ન� લોો માાક કકબલ ની સાઇજ કો યતપ ન� કયવામા આવપ છપ? ૦૩ OR (a) What are the standard size of cables available in the market? 03 (અ) માક�ા મા મળતા કકબલ ની સાાચોોટ સાોજ જણાવો. ૦૩ (b) How ELCB helps in saving life? 03 (બ) ELCB કો યતપ �જટદગી બવાવપ છપ? ૦૩ OR (b) Write three advantages of MCCB. 03 (બ) MCCB ના ણ �ાીદા લખો. ૦૩ (c) Write any Two IE rule related to commercial complexes. 04 (ક) કોમસ�ીલ કોમલપકસ નપ લગતા કોો પણ ણ IE નીમો લખો. ૦૪ OR (c) Calculate total monthly bill of a Library having 100 fans (65W),50 tubes

(60W),50 CFL (45W) , Water Cooler with a duty cycle of 50% (1 HP) , Library is open for 10 Hrs a day, Assume energy charge as Rs 6.00 per unit.

04

(ક) યોજ ના 10 કલાક માાક �લલા યનકતા સતકાલી માાક વીજળ �બલ ગણો.

સતકાલીમા 100 પખા (65W),50 ા�બલાોા (60W),50 CFL (45W) , વોાય

�લય 50% ો�ા સાઇકલ (1 HP) ,�. 6/-પત ના ધાયો.

૦૪

(d) Prepare a testing report for the new Transformer to be installed for a remotely located Foot Ball Stadium.

04

(ો) �ય �સથત એક ા બોલ મપદાન માાક લગાવાો યનકલા નવા ાચસ�ોમટય નો

ાક�સાટગ સયપોાટ બનાવો.

૦૪

OR (d) Write advantages of Digital Energy meters. 04 (ો) સો�જાલ એન�� માય ના �ાીદા લખો. ૦૪ Q.4 (a) Compare commercial and Residential wiring. 03

પ�. ૪ (અ) કોમસ�ીલ અનપ યનકણાક વાીસયટગ સયખાવો. ૦૩

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OR (a) Name different types of wirings. 03 (અ) વાીસયટગ ના પકાયો ના નામ લખો. ૦૩ (b) What are the factors to be kept in mind while Cable laying in high rise

buildings? 04

(બ) બ�માળ ોમાયત મા કકબલ લપ�ગ સમીપ � ાીાનપ લપ જોઇીપ? ૦૪ OR (b) Calculate the material required for the street lights of 2000 meters long

circular walk way .Prepare a table. 04

(બ) 2000 મીાય વ� ટળાકાય યસતાની સા લાોાથગમાાક જોો� મસાસયીલ કોયાક

બનાવી ગણો.

૦૪

(c) Estimate the total cost of electrification for a 10 Floor residential complex, having 10 (3BHK) flats on each floor. Also show detailed wiring diagram of a single flat. Assume appropriate load for each flat, water pump, common lobbies etc.

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(ક) યનકણાક કોમલપકસ ના વાીસયટગનો �લ ખવટ ગણો અનપ એક ફલફા નો વાીસયટગ

ોાીાગામ દોયો. વગત: 10 માળ, પત માળ 10 ફલપા(3BHK), દયકક ફલપા,

પાણી માાકની મોાય , લોબી વગપયક માાક લોો નતપ ધાય લો.

૦૭

Q.5 (a) Write short note on Earthing for a Theater. 04 પ�. ૫ (અ) �ક ન�ધ લખો :થીીપાય માાક� અયથથગ. ૦4

(b) Write short note :Electrical safety measures for a Shopping Mall. 04 (બ) �ક ન�ધ લખો : શોપટગ મોલમા ોલપ�કક સપફા. ૦4 (c) Draw a cable layout of a six floor building with proper load balancing,

showing circuits and sub circuits, bus bar arrangements etc. 03

(ક) છ માળ ધયાવતા �બલોથગ માાક સસકકા, સબસસકકા,બસબાય વીવસથા વગપયક

દશાટવતી આ��ત લોો બપલપ�ચસટગ સાથપ દોયો.

૦૩

(d) Write short note on : Electrical Maintenance difficulties in High rise buildings 03 (ો) �ક ન�ધ લખો:બ�માળ ોમાયતના ોલપ�કક સમાયકામ મા પોતી

અગવોતાઓ.

૦૩

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