What should be verified for a GFCI receptacle installation on a branch circuit?

For a GFCI (Ground Fault Circuit Interrupter) receptacle installation on a branch circuit, verifying the correct conductor size and fill volume is essential. This ensures the circuit can safely handle the electrical load without overheating and that it complies with electrical codes and regulations. Proper conductor sizing is crucial to prevent excess voltage drop and ensure efficient operation, while fill volume pertains to the physical space available for conductors within conduits, which helps to prevent overheating due to overloading.

Each of the other factors listed is also important in their own right. For instance, installation manual guidance assists in ensuring that the GFCI is properly configured, and compatibility with other circuit devices ensures that they operate harmoniously, minimizing risks of failures. Ground fault detection capability is critical for the GFCI itself to function correctly; however, it assumes that the GFCI is already installed. Therefore, while relevant, these factors do not address the specific technical requirements of the branch circuit installation as the correct conductor size and fill volume do.