Is drainage required for raceways that enclose service-entrance conductors if embedded in masonry?

The requirement for drainage in raceways that enclose service-entrance conductors embedded in masonry is indeed mandated because these conditions can cause moisture to accumulate. The presence of moisture may lead to corrosion and degradation of the conductors, impacting their performance and safety over time.

The National Electrical Code (NEC) emphasizes safety by requiring raceways that are likely to trap water or moisture, especially when embedded in masonry, to have proper drainage provisions. This requirement is crucial for preventing water accumulation around the conductors, which can create hazardous conditions, including short circuits or failures in the electrical system.

Understanding this requirement highlights the importance of proper installation practices in maintaining the safety and integrity of electrical systems, especially in environments where moisture is a concern. Ensuring that raceways have drainage prevents potential problems associated with water exposure, fulfilling the safety standards set forth in the NEC.