DP = Double Pole MCB (The Main Switch)
This allows you to turn OFF and ON the electric supply to your home as it is is the main operating switch to control & manage the flow of electric supply in the wiring system. By using the Main Switch, you may be able to immediately switch OFF the electric supply in the home in case of emergency i.e.
Circuit breaker is a device which switch OFF the circuit from electric supply at abnormal and make the circuit in normal conditions same as fuse. These are automatic protection devices in the Main switch board or fuse-box that switch off a circuit if they detect a fault. the size of the fuse and Circuit Breaker are similar, but using circuit breaker instead of fuse make sense due to automatic operation.
How to Wire RCD (Residual Current Device) ?
In this Single Phase home supply wiring diagram, the main supply (Single Phase Live (Red Wire) and Neutral (Black Wire) comes from the secondary of the transformer (3 Phase 4 Wire (Star) System) to the single phase energy meter (Note that Single Phase supply is 230V AC and 120V AC in US). These two lines (Line and Neutral) from energy meter are connected to the Double Pole MCB isolator switch.
3 окт 2024
