Mating connectors for PV equipment shall be polarized and shall have a configuration that is ___ with receptacles in other electrical systems on the premises.

• A. compatible
• B. consistent
• C. interchangeable
• D. noninterchangeable

Answer: (D)

Mating connectors for PV equipment are kept noninterchangeable with receptacles in other electrical systems on the premises to prevent accidental cross-connection. This noninterchangeable configuration, along with polarization, ensures that PV output can only connect to PV-specific inlets and outlets and not to standard building circuits. The safety goal is to avoid miswiring, backfeeding, shocks, or equipment damage that could occur if PV connectors could fit with other systems. If a connector were merely compatible or interchangeable, it could mate with non-PV receptacles, creating dangerous or unintended electrical paths.