Is the term "traveller" defined or used anywhere else in the NEC? If I could use that term, it would shorten that exception a bunch...1.) NEC Section/Paragraph: 310.15(B)(2)(a)
2.) Proposal Recommends: new text
3.) Proposal: Add exception:
Exception No. x: A conductor in three-way and four-way switch loops in cable or raceway installations shall be omitted from adjustment factors where the load connected cannot be connected to another supplying conductor at the same time.
4.) Substantiation: In most threeway and fourway switching methods, the load is alternated between travellers, eliminating the need to include both travellers in derating.
[ March 20, 2005, 08:28 AM: Message edited by: georgestolz ]