Q. What is the Code rule regarding support of raceways and boxes by a cable tray?
See the answer below.
A. In industrial facilities where conditions of maintenance and supervision ensure only qualified persons will service the installation, and if the cable tray system is designed and installed to support the load, cable tray systems can support raceways, cables, boxes, and conduit bodies [392.18(G)] (Figure).
For raceways terminating at the tray, a listed cable tray clamp or adapter must be used to securely fasten the raceway to the cable tray system. The raceway must be supported in accordance with the appropriate raceway Article.
Raceways or cables running parallel to the cable tray system can be attached to the bottom or side of a cable tray system. The raceway or cable must be fastened and supported in accordance with the appropriate raceway or cable’s Code Article.
Boxes and conduit bodies attached to the bottom or side of a cable tray system must be fastened and supported in accordance with Sec. 314.23.
These materials are provided to us by Mike Holt Enterprises in Leesburg, Fla. To view Code training materials offered by this company, visit www.mikeholt.com/code.
