Sizing Conductors, Part ⅩⅩⅩⅤ: Tap conductors

摘要

Transformer secondary conductor rules are similar to the rules for tap conductors. Rules for transformer secondary conductors and tap conductors are even in the same section of the National Electrical Code (NEC). A tap conductor has overcurrent protection ahead of its point of supply, but the rating of that overcurrent protective device exceeds the value permitted for similar conductors that are protected as described elsewhere in 240.4. Likewise, most transformer secondary conductors are not protected in accordance with their ampacities as specified in 310.15.