The provisions of Article 392 of NFPA 70 are adopted by reference with the following modifications:
1. Revise the informational note to section 392.1 to read:
"Informational Note: For further information on cable trays, see ANSI/NEMA-VE 1-2009, Metal Cable Tray Systems; and NECA/NEMA 105-2015, Standard for Installing Metal Cable Tray Systems."
2. Revise section 392.10, including table 392.10(A), to read:
"(A) Uses Permitted. Metal cable tray shall be permitted to be used as:
(1) A support system for ac or dc power conductors 50 volts or less
(2) For communications circuits, control circuits, and signaling circuits.
(3) A support system for the wiring methods in Table 392.10(A), under the conditions described in their respective articles and sections.
Table 392.10(A) Wiring Methods
Wiring Method | Article/Chapter
|
Wiring Method | Article/Chapter
|
Electrical metallic tubing: Type EMT | 358 |
Instrumentation tray cable: Type ITC | 727 |
Intermediate metal conduit: Type IMC | 342 |
Mineral-insulated, metal-sheathed cable: Type MI | 332 |
Multipurpose and communications cables | Chapter 8 |
Optical fiber cables | 770 |
Other factory-assembled, multiconductor control, signal, or power cables that are specifically approved for installation in cable trays | |
Power-limited tray cable | 725 |
Rigid metal conduit: Type RMC | 344 |
(B) Hazardous (Classified) Locations. Cable trays in hazardous (classified) locations shall contain only the cable types and raceways permitted by other articles in this Code."
3. Revise subsection 392.12 to read:
"Uses Not Permitted. Cable tray systems shall not be used in the following:
(1) Hoistways
(2) Where subject to severe physical damage
(3) Ducts and other spaces for environmental air subject (plenums) subject to 300.22
(4) As a support system for ac or dc power conductors over 50 volts"