Cable Tray Support Requirements

If used in these areas it must be supported in an open cable support system such as cable runway center rail and ladder type cable tray.

Cable tray support requirements. In a closed system such as raceway wireway or solid bottom tray with solid covers plenum cable is not required by the nec. Hazardous voltages in electrical equipment can cause severe personal injury or death. Do not use a cable tray as a walkway ladder or support for people. Fg 1 fiberglass cable tray systems covers construction and test requirements for continuous complete nonmetallic systems of ladder ventilated solid bottom cable trays or channel type trays intended for the support of power or control cables or both.

Nema fg 1 was rescinded as a published standard in november 2017. Standard depths of 1 1 inches in metal systems and 1 1 1 8 1 5 and 2 3 16 inches in nonmetallic systems. Because cable trays offer flexibility for expansion and changes engineers and designers should design and size cable tray systems to anticipate both current and future needs. Load and support requirements.

Standard widths of 3 4 and 6 inches in metal systems and up to 8 inches in nonmetallic systems. An economical support for cable drops and branch cable runs from the backbone cable tray system. Plenum cable can be used only in environmental air handling areas. Cable tray is a mechanical support system for cables and raceways.

Mushroom headed steel roofing bolts and nuts shall be used for the installation and coupling of trays. Under nec article 392 metallic cable trays are required to. 29 cfr 1910 303 b 8 requires the appropriate mounting and cooling of electrical equipment.