Question

The ampacity of the phase wires from the generator terminals to the first overcurrent device must be a smallest of what percent of the nameplate current of the generator?

1. 100%
2. 115%
3. 125%
4. 150%

Answer 1

The phase wires from the generator terminals to the first overcurrent device must have an ampacity of at least 125% of the nameplate current of the generator to handle overloads safely.

Step-by-step explanation:

The ampacity of the phase wires from the generator terminals to the first overcurrent device must be at least 125% of the nameplate current of the generator. This requirement ensures that the conductors can handle potential overloads without posing a risk of fire or other damage before the overcurrent protective device activates to interrupt the circuit. This rule is often codified in electrical codes and standards to help ensure safety and reliability in electrical installations.