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It's the same as a fuse box. Sort of. The electric service panel used to be called the fuse box, fuse panel,  circuit breaker panel, or any number of other terms. Today, most homes have what we call the electrical service panel, or simply, the service panel. It's not literally the same thing, but it does provide the same function.
When a relay is used to switch a large amount of electrical power through its circuits, it is given a new name, a Contactor. These contactors are very commonly used in industries for control of electric motors. Thus it is clear that contactor is only a special type of relay.y olivia Last updated on: February 28, 2011. Contactor vs Relay. Contactor and relay are two terms often encountered when dealing with electric circuits. Both these devices are used for similar purposes and hence people are often confused about the difference between a contactor and a relay.