g. All exposed metal must earthed; fuses and
miniature circuit breakers (MCBs) are designed trip under fault condi-
tions and residual current devices (RCDs) are designed trip below the
fatal level described Chapter 4.
.13
Touching live and earth live and neutral makes person part the electrical circuit and can lead to
an electric shock.
● breathing heart has stopped, immediately call professional help
by dialling 999 112 and asking for the ambulance service. push him off with piece wood, pull him off with scarf,
dry towel coat.30
Basic Electrical Installation Work
To prevent people receiving electric shock accidentally, all circuits must
contain protective devices. Actions taken upon finding workmate receiv-
ing electric shock are follows:
● Switch off the supply possible.
● Treat for shock.
● Alternatively, remove the person from the supply without touching
him, e.
Consumer’s isolation and
protection equipment
L
N
E
Supply
transformer
secondary
winding
FIGURE 1.
When this happens necessary act quickly prevent the electric
shock becoming fatal. The casualty stands
the best chance survival the emergency services can get rapid
response paramedic team quickly the scene.
● Only then should you apply resuscitation cardiac massage until
the patient recovers, help arrives.
Construction workers and particularly electricians receive electric
shocks, usually result carelessness unforeseen circumstances. They have extensive
training and will have specialist equipment with them. Give
precise directions the scene the accident
