When a branch circuit to an isolated ground receptacle is installed using Schedule 40 PVC, how many grounding conductors are required?

The requirement for grounding conductors in an installation using Schedule 40 PVC for an isolated ground receptacle is determined by national electrical codes and best practices for safety. In this specific case, when installing a branch circuit for an isolated ground receptacle, two grounding conductors are necessary.

One grounding conductor is essential to connect the equipment grounding terminal of the isolated ground receptacle to the grounding system, ensuring that if a fault occurs, there is a path to ground that can trip the circuit breaker or fuse.

The second grounding conductor is specifically for the isolated ground. This conductor is typically taken back to the main service grounding bus, which helps eliminate noise and creates a more stable reference for sensitive equipment. This dedicated grounding system is crucial for outlets serving sensitive electronic devices, providing additional protection against electrical noise and ensuring the receptacle operates correctly.

In summary, two grounding conductors are required in this installation scenario to ensure effective operation and safety of the isolated ground receptacle.