Mating connectors in PV source circuits must be configured to be what in relation to receptacles in other electrical systems?

Mating connectors in photovoltaic (PV) source circuits must be configured to be noninterchangeable in relation to receptacles in other electrical systems. This requirement is crucial for safety and specific operational standards. By ensuring that the connectors are noninterchangeable, it prevents accidental connections between solar power and other unrelated electrical systems, which could lead to dangerous conditions, equipment failure, or even electrical fires.

This specification aligns with the principle of reducing the risk of incorrect wiring and ensuring that only compatible components are used together. If the connectors were interchangeable or universal, it could lead to a situation where PV source circuits could inadvertently link to other electrical networks, which might operate at different voltages or current levels, causing potential hazards.

In summary, the designation of connectors as noninterchangeable serves a vital safety function within the guidelines of Article 690 of the National Electrical Code, ensuring that photovoltaic systems are correctly isolated from other electrical systems.