Cable Tray Support Design Calculation

Sum of od in total cross sectional areas of all cables.

Cable tray support design calculation.

Cable raceway tray support calculations cable tray is sized based on the number and type of cables required for the current and future need. To join two components together clamp or fix to walls ceilings or other supports covers and cable retainers associated supports bespoke supports for cable tray and cable ladder other than bs 6946 channel. Steel fiberglass or else to state the right diameter. 6 cable ladder and cable tray systems including channel support systems and other associated supports definitions and abbreviations accessory component used for a supplementary function e g.

On tue dec 2 2014 at 7 52 pm electrical notes articles wrote. Total sum of the diameters. A cable tray manufacturer has to provide the cable tray parts data as width height weight. Tray design depth.

Then according to cable tray support configuration a structural engineer may calculate the actual load on each support rod and according to rod material. Evenly distributed load 2 x point load support distance. The installation will use cat cable at 19 in diameter 20 lb. 1 insure that macros have been enabled.

It would take 7 3 inch conduits to obtain this allowable fill area 7 2 95 square inches 20 65 square inches. Calculate cable tray width calculate cable tray area calculate cable tray length calculate cable tray weight calculate remaining width of cable tray calculate remaining area of cable tray free download. For cable tray installers this publication is intended as a practical guide for the proper installation of cable tray systems. Quick tray wire mesh cable tray fill table at 50 fill use the following formula to calculate the number of cables that will result in a particular fill ratio where.

A 50 fill ratio should equal the maximum number of cables pulled in a given cross section. The cost of 600 volt insulated multiconductor cables listed for use in cable tray is greater than the cost of 600 volt insulated individual conductors used in conduit. A inside tray area in in 2 d cable diameter in inches f fill ratio in n number of cables the formula is n f a 100 d 2 2 π example. Straight section supports installed at 5 foot 1 5m centers are typical.

Support load calculation per iec 61537.