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Monday, August 22, 2016
Question:
Is it legal to use 2 wire NM-B for 3 and 4 way switch travelers if a neutral from the same circuit is present at each switch location?
Tom Ekstrom
A
Answer:
Hey Tom thanks for your question. The general rule in 300.3(B) states that all conductors of a circuit must be within the same cable or other wiring method. But 300.3(B)(3) allows the conductors to be in different nonferrous wiring methods, such as NM cables, if they comply with 300.20(B). Make sure your AHJ agrees with this interpretation.