Differentiating Between Fuse Wire and Phase Wire in Electrical Systems

What is the function of a fuse wire in an electrical circuit?

A. To carry electricity from the source to the load
B. To protect the circuit from excessive current
C. To ground the circuit
D. To provide an alternative return path to the earth

Answer:

B. To protect the circuit from excessive current

A fuse wire plays a crucial role in protecting an electrical circuit from excessive current by breaking the connection. When the current flowing through the circuit exceeds a predetermined level, the fuse wire is designed to melt and interrupt the flow of electricity, preventing damage to the circuit or appliances.

The fuse wire is an essential component of a protective system that includes a fuse or circuit breaker. It is integrated within the phase wire to safeguard against thermal overload and ensure the safety of the electrical system.