Where above ground exterior branch circuit conduits enter a building, what is required to prevent condensation according to the NEC®?

When exterior branch circuit conduits enter a building, the requirement to prevent condensation is outlined in the National Electrical Code (NEC) under section 300.7(A). This section specifically dictates that conductors entering a building must be arranged to prevent condensation from forming, which can lead to moisture accumulation and potential damage or electrical hazards. Proper sealing around the conduit entries and maintaining an appropriate temperature differential helps mitigate the risk of condensation, ensuring that the electrical installations remain safe and secure.

The relevance of this provision ensures that electrical systems are protected from moisture-related issues, thereby enhancing their longevity and operational reliability. Other sections, while they may cover related topics regarding conduits and wiring practices, do not specifically address the prevention of condensation in the same focused manner as section 300.7(A).