Safety
Mains Supply (2)
- An RCD or ELCB (Earth Leakage Circuit Breaker) in a fraction of a
second cuts off the power if the current flowing in the live and neutral
become unequal by a preset amount (usually 30mA) which would happen if
that amount of current flowed from live to earth
- Remember a lethal current (50mA) could flow through you to earth without
a fuse blowing. An RCD would trip out at over 30mA of
current flow to earth
- If a person comes in contact with live circuits,
switch off before giving assistance