Cable Tray Loading Depth

New 5 load depth glas tray.

Cable tray loading depth.

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. 10 foot length part numbers type fe rung spacing section width. This is the total weight of cables in the tray. Wire basket cable tray fill calculator cable tray sizing calculator.

Which is subject to change at any time. Below is the data for quick tray wire mesh cable tray fill table at 50 fills. 90 7 kg concentrated load over and above published loads. 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.

Cables of 0 21. Tray size of 0 1852 o d. Cope glas cable tray system. For purposes of selecting a suitable tray this weight should be rounded off to the next higher.

I don t know how a modern program could calculate the ampacity. 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. Matching cover listed below.

A conduit wiring system an engineer must be knowledgeable of both their installation and the system features. Cable load working load the cable load or the working load is the total weight of the cables to be placed in the tray. In power station we used only solid bottom open top tray and the ampacity is calculated as per the. To obtain mid span deflection multiply a load by the deflection multiplier.

Published load safety factor is 1 5. Cope is the original brand of cable tray. Today the cope brand is part of atkore international and is the premier producer of all major categories of cable tray systems. Cable trays will support without collapse a 200 lb.

To convert 1 5 safety factor to 2 0 multiply publish load by 0 75. Cable tray must be supported on spans shorter. 3 4 lip on both sides. Cope cable tray systems.

To obtain mid span deflection multiply a load by the deflection multiplier. 5 side rails with 4 loading depth. To convert 1 5 safety factor to 2 0 multiply the published load by 0 75. Inside vertical riser guides and transitions cable tray up or level with cables on the inside.

This table for cable tray sizes is provided by hoffman enclosures inc. The nema classes are based on cable loads of 50 75 and 100 per lineal foot. Aluminum cable tray inside riser 90 each section includes splice plates and hardware. To properly evaluate a cable tray wiring system vs.

06 152mm 09 229mm 12 305mm 18. Cable trays will support without collapse a 200 lb. Published load safety factor is 1 5. Cable tray must be supported on spans shorter than.