What is the minimum volume allowance required for conductor fill in a GFCI receptacle device on a 20-ampere circuit?

The minimum volume allowance for conductor fill in a Ground Fault Circuit Interrupter (GFCI) receptacle device on a 20-ampere circuit is indeed 2.25 cubic inches. This requirement is established to ensure that there is adequate space within the electrical box to accommodate the conductors connected to the GFCI receptacle, thus preventing overheating and potential fire hazards. Adequate conductor fill also ensures that electrical connections can be made safely without pinching or overly bending wires, which can lead to failures or compromised performance of the electrical system.

Understanding the importance of conduit fill and box volume is critical for maintaining safety and compliance with electrical codes, which aim to protect both people and property from electrical hazards. Proper volume allowance helps to adhere to standards that ensure sufficient space for heat dissipation as well as mechanical protection for the wires and connections.