You're on the right track, but there's a crucial misunderstanding of how voltage to ground is determined in a 240V circuit.Here's the breakdown to clarify: Voltage to Ground for a 240V Circuit (like a 15-50)

In a standard 120/240V single-phase system, the voltage to ground for each leg of the 240V circuit is

120V. This is because each hot leg is 120V relative to the neutral (which is tied to ground at the service). Think of it as each leg using the neutral as the reference to ground, even though the neutral isn't used for the appliance in a 240V appliance. NEC 210.8 (2023)

This section mandates GFCI protection for 125V through 250V receptacles supplied by single-phase branch circuits rated 50 amps or less in specific locations. This section says nothing about voltage to ground.

Application to a 15-50 in a Kitchen (2023 NEC)

A 15-50 receptacle is likely used for an electric range/stove or other 240V appliance.

NEC 210.8(A)(6) (2023) requires GFCI protection for 125-volt through 250-volt receptacles supplied by single-phase branch circuits rated 50 amps or less installed in dwelling unit kitchens or island and peninsular countertops and work surfaces.

Therefore, the inspector is likely correct. A 15-50 receptacle installed in a dwelling unit kitchen, falls under the requirements of NEC 210.8(A)(6) for GFCI protection.

Important Considerations



2020 vs. 2023 NEC Code Cycle

The 2020 NEC might have slightly different wording or exemptions. The most current code cycle being enforced in your jurisdiction will dictate the requirements. Make sure you clarify the code cycle.*

Specific Appliance

The appliance plugged into the 15-50 does not matter. If the receptacle is in the kitchen, it requires GFCI protection.

In summary, the inspector's request is likely based on NEC 210.8 mandating GFCI protection for 125V through 250V receptacles rated 50 amps or less in dwelling unit kitchens. Flag for review