electrical safety

Electrical hazard

Hazards include

• Burn

• Death

• Fire

• Explosion & ARC

Burns

Death

Fire

Explosion

Arc

Electric shock

• Electric shock accounts for 8% all the deaths around worlds construction accidents.

• What is electric shock?• Electric shock is the convulsive reaction by the human body to the flow of electric current through it.

. This sense of shock is accompanied by pain and, in more severe cases, by burning .

Electric Shock• Received when current passes

through the body• Severity of the shock depends on:

– Path of current through the body

– Amount of current flowing through the body

– Length of time the body is in the circuit

• LOW VOLTAGE DOES NOT MEAN LOW HAZARD

Shock reasons

• Coming in contact with electric passage• Using non-insulated tools• Working in wet atmospheres • Working with wet power tools • Damaged wires and plugs• Not wearing the insulating gloves during

operation.

A shock affected

SHOCK and DEATH due to Bad insulation

Treatment of electric shock and burns

• Switch off the power if it is possible and/or the position of the emergency isolation switch is known.

Shock accident • If it is not possible to switch off the power, then push or pull the person away from the conductor using an object made from a good insulator, such as a wooden chair or broom

Call for an ambulance.

Resuscitation

• If the person is not breathing apply mouth-to-mouth resuscitation and, in the absence of a pulse, chest compressions. When the person is breathing normally place them in the recovery position.

Resuscitation

Work using electrically powered equipment

• You should make sure that electrical equipment used for work is safe

• Perform a risk assessment to identify the hazards.• Check that the electrical equipment is in good condition.• Check that the equipment is suitable for the electrical supply

with which it is going to be used, and the electrical supply is safe.

• Switch off and unplug the equipment before you start any checks.

Safe Work Practices– De-energize-Lockout Policy– Don’t wear conductive apparel– Work area must be illuminated– Never reach into blind spots– Don’t allow conductive liquids near electrical work or

equipment– Use nonconductive ladders

• Check that the outer cover of the equipment is not damaged in a way that will give rise to electrical hazard.

Check that the plug is not damaged and that the cable is properly secured with no internal wires visible.

Bad insulation

• Position any trailing wires so that they are not a trip hazard and are less likely to get damaged.

• Use a Residual Current Device (RCD) as they shut the supply on a very few Ampere change.

THE END