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NEC 300.11(C) Support

jar546

CBO
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The code reads this way:

(C) Raceways Used as Means of Support.
Raceways shall be used only as a means of support for other raceways, cables, or nonelectrical equipment under any of the following conditions:
  • (1) Where the raceway or means of support is identified as a means of support
  • (2) Where the raceway contains power supply conductors for electrically controlled equipment and is used to support Class 2 or Class 3 circuit conductors or cables that are solely for the purpose of connection to the equipment control circuits
  • (3) Where the raceway is used to support boxes or conduit bodies in accordance with 314.23 or to support luminaires in accordance with 410.36(E)
What it means is this:

As a general rule, this section prohibits supporting cables by securing them to the exterior of a raceway. Electrical, telephone, and data cables wrapped around a raceway can impede dissipation of heat from the raceway, thus affecting the temperature of the conductors contained in the raceway. The weight from large bundles of cables can compromise the mechanical integrity of the raceway system. For those reasons, this section also prohibits the use of a raceway as a means of support for nonelectrical equipment, such as suspended ceilings, water pipes, and signs.

Class 2 conductors or cables are allowed to be supported by a raceway as long as the power supply conductors are inside the raceway or functionally associated with the attached Class 2 circuit conductors. For example, the thermostat conductors for heating or air-conditioning units are permitted to be supported by the conduit supplying power to the unit.

How would you explain this to a contractor who just violated this section?
 
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