An electrical service panel, also referred to as a load center, circuit breaker box, or panelboard, is an essential part of a home's electrical system. Its role is to accept power from the utility company and then distribute it to the different electrical circuits in the house.

An MCB is an automatically operated electrical switch. Miniature circuit breakers are intended to prevent damage to an electrical circuit as a result of excess current.

An MCCB, or Molded Case Circuit Breaker, is an electrical safety device that automatically disconnects electrical power when it identifies an overload, short circuit, or ground fault. Its purpose is to safeguard an electrical circuit from harm due to excessive current caused by an overload or short circuit.

Supplementary protectors are devices designed to meet the UL 1077 requirements. They supplement circuit protection by providing over-current protection where branch circuit protection is already in place or not required.