About this document
Cable Tray Thermal Expansion Guidelines by ahmodah is a document available to read on EtoBox.
1) Cable trays need expansion joints to allow for thermal contraction and expansion due to temperature changes. The NEC requires expansion joints where necessary, while NEMA standards provide specifications on placement and sizing. 2) Factors like material, temperature range, and installation temperature determine the required gap size and spacing of expansion joints. For a 100°F temperature differential, steel trays require a joint every 128 feet and aluminum every 65 feet. 3) Bonding jumpers around expan
- Author
- ahmodah
- Language
- EN