ELECTRICAL DISTRIBUTION BOARD DB WIRING
The Distribution Board or Fuse Boards usually contains following three things :
Double Pole (DP) MCB (The main switch or Isolator):
Circuit breaker is a device which switches on at normal condition and off automatically electricity at any abnormal condition. Alternately we can say these are automatic protection devices in DB that switch off a circuit if they detect a fault. Circuit Breaker may be SP-Single Pole, DP-Double Pole and TP-Triple Pole.