For a 2 hp, 208-V motor circuit that uses DETD fuses, what is the minimum size EGC?

To determine the correct minimum size Equipment Grounding Conductor (EGC) for a 2 hp, 208-V motor circuit using DETD fuses, it is essential to consider the requirements set forth by the National Electrical Code (NEC).

In general, the size of the EGC is influenced by the size of the overcurrent protection device and the type of equipment being installed. For a motor rated at 2 hp, especially in a 208-V circuit, the appropriate grounding conductor is derived from NEC Table 250.122, which outlines the minimum EGC sizes based on the rating of the overcurrent protective device protecting the circuit.

In this case, since the motor is rated at 2 hp, it typically would be protected by fuses rated around 15-20 amps. According to NEC Table 250.122, for overcurrent protection devices rated up to 20 amps, the minimum size for the EGC is 14 AWG. This size ensures that the EGC can safely conduct any potential fault current back to the ground without exceeding its ampacity and risking overheating or damage.

Choosing 14 AWG as the minimum size EGC aligns with the NEC's requirement for grounding safety in electrical systems, thereby providing adequate