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