Cable Tray Loading Capacity

2 select the tray class load capacity loading the standard classes of cable trays as related to their maximum design loads and to the associated design support spacing based on a simple beam span requirement shall be designated in accordance with table 1.

Cable tray loading capacity.

Fep fepb mi rhh rhw 2 sa sis tbs thhn thhw thw 2 thwn 2 use 2 xhh xhhw xhhw 2 zw 2 unless otherwise specifically permitted elsewhere in the nec nfpa70 code the overcurrent protection for conductor types marked with an asterisk shall not exceed 15a for no. Cable load working load the cable load or the working load is the total weight of the cables to be placed in the tray. The primary role of cablofil cable management from legrand is to be an efficient and universal cable support. Wire basket cable tray fill calculator cable tray sizing calculator.

The nema classes are based on cable loads of 50 75 and 100 per lineal foot. Cable weight lbs ft. This is the total weight of cables in the tray. Minimally 400 increased support and cable strain is reduced up to 65.

For purposes of selecting a suitable tray this weight should be rounded off to the next higher. Watch video learn more. Tw uf 75 c 167 f. Which is subject to change at any time.

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. The quick tray wire mesh cable tray fill table below shows the number of cables and the load in lbf lineal foot developed by typical 4 pair and 6 pair cable weighing 20 lb kft and 40 lb kft respectively while this table is a useful guide actual loads must be calculated using the cable specified. Rhw thhw thw thwn xhhw zw 90 c 194 f. They can also be mounted on wall using brackets.

This table for cable tray sizes is provided by hoffman enclosures inc. Tested load capacity lbs ft. The construction of wbt s shaped tray eliminates stress and pressure point on today s high speed performance cabling media. Perforated cable trays can be hung using a center rod support c hanger or two trapeze configuration.

Quick tray wire mesh cable tray fill table at 50. Cables of 0 21. Cablofil wire mesh tray loading. The cable tray sizing equals the width times the loading depth.

50 fill ratio. 14 copper 20a for no. These trays can accommodate large number of branch lines and have high load bearing capacity. Below is the data for quick tray wire mesh cable tray fill table at 50 fills.

Cable load foot 49 cables 20 lb 1000 ft. The mechanical performance of all products and accessories is tested to the stringent requirements of the international standard iec 61537 and nema ve 1 csa 22 2.