None of them need to run in a cable tray. ![]() All of these wiring methods are self-contained and can be run on various building surfaces. 318-3(a)(1), which lists many permitted wiring methods eligible for cable tray support, all of which have their own articles in the NEC. Note that cables and raceways are self-contained Chapter 3 wiring methods without additional protection or separations. A unit or an assembly of units or sections, and associated fittings, forming a rigid structural system used to support cables and raceways. 318-2 underscores this point:Ĭable Tray System. The fact is, cable trays generally are not recognized as raceways, and they aren't included in the general definition of race-ways in Art. Even where the conductors are equal to or larger than the minimum size, we see cable trays used for single conductors in nonindustrial occupancies, violating Sec. Often individual conductors far smaller than the 1/0 threshold show up in cable tray systems. ![]() ![]() This creates the appearance of a raceway wiring method, often in unintended ways. A Class 2 cable assembly can run on a wall with no separation from a power cable in most cases can this be done in a cable tray?Ĭable trays are the only support system for wiring methods with their own article in the NEC, and they can run long distances.
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