Cable Tray Loading Depth

Cable tray must be supported on spans shorter than.

Cable tray loading depth. For purposes of selecting a suitable tray this weight should be rounded off to the next higher. Cope glas cable tray system. The nema classes are based on cable loads of 50 75 and 100 per lineal foot. 90 7 kg concentrated load over and above published loads.

The cable tray sizing equals the width times the loading depth. 06 152mm 09 229mm 12 305mm 18. Generally cable tray sizing is correct when it appears 50 full of cable or wire or when it contains a 50 fill of cables or wire. In 1948 thomas jefferson cope developed the first modular cable tray system and introduced it to the electrical industry.

5 side rails with 4 loading depth. Below is the data for quick tray wire mesh cable tray fill table at 50 fills. To convert 1 5 safety factor to 2 0 multiply publish load by 0 75. Cable tray must be supported on spans shorter.

To properly evaluate a cable tray wiring system vs. 90 7 kg concentrated load over and above published loads. Cable trays will support without collapse a 200 lb. I don t know how a modern program could calculate the ampacity.

To obtain mid span deflection multiply a load by the deflection multiplier. Cables of 0 21. This table for cable tray sizes is provided by hoffman enclosures inc. Aluminum cable tray inside riser 90 each section includes splice plates and hardware.

Cope cable tray systems. Cable trays will support without collapse a 200 lb. 3 4 lip on both sides. Cope is the original brand of cable tray.

To convert 1 5 safety factor to 2 0 multiply the published load by 0 75. Published load safety factor is 1 5. Matching cover listed below. Today the cope brand is part of atkore international and is the premier producer of all major categories of cable tray systems.

Cable load foot 49 cables 20 lb 1000 ft. Cable tray wiring systems are the preferred wiring system when they are evaluated against equivalent conduit wiring systems in terms of safety dependability space and cost. Cable tray having a usable inside depth of 150 mm 6 in if the depth is more than 6 nec recommends the filling percent will be calculated as only 6 in it is the depth. Inside vertical riser guides and transitions cable tray up or level with cables on the inside.

New 5 load depth glas tray. 10 foot length part numbers type fe rung spacing section width. In power station we used only solid bottom open top tray and the ampacity is calculated as per the. Which is subject to change at any time.

Published load safety factor is 1 5. A conduit wiring system an engineer must be knowledgeable of both their installation and the system features. To obtain mid span deflection multiply a load by the deflection multiplier. This is the total weight of cables in the tray.