Cable Tray Width Calculation

On tue dec 2 2014 at 7 52 pm electrical notes articles wrote.

Cable tray width calculation. Cable raceway tray support calculations. This is typically in a raceway cable tray or conduit in a cable burried in the earth or in open air. Cable tray is sized based on the number and type of cables required for the current and future need. The sum of the cable diameters is not to exceed 90 of the available cable tray width.

To determine the required width of a ladder or ventilated trough cable tray as per section 318 11 b 4. 1 2 no s of 3 5cx300 sq mm xlpe cable having 59 7mm outer diameter and 5 9 kg meter weight 2 2 no s of 3 5cx400 sq mm. Tray size of 0 1852 o d. Not required outside diameter cable qty cable size weight lbs ft total cable weight.

Practical guide on the amount of cable weight that can be installed tested in accordance with nema ve 1 csa e222 2 126 1. Cable id cable o d. Voltage drop choose the maximum percentage of the source voltage drop. 9 to begin a new calculation return to the input screen and select the clear button.

Calculate size of cable tray for following cable schedule. Cable tray should be perforated and 20 spare capacity. Space between cables must be equal to 2 15 times one cable diameter 3 x 2 15 x 1 07 inches 6 90 inches. Distance enter the one way length of the wires in the circuit in feet.

Lbs ft inside tray depth. This will clear both the input and output pages. 2 fill in all pertinent project information. This excel sheet contains formulas for calculating cable tray size and conduit size.

A 50 fill ratio should equal the maximum number of cables pulled in a given cross section. 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. Cables of 0 21. Total cable tray width required is 8 56 inches 6 90 inches 15 46.

Solid bottom cable tray. All the calculations are subjected to the requirements of the national electrical code nec. Cable tray size includes tray width tray length tray weight and tray area. Wire basket cable tray fill calculator cable tray sizing calculator.

Chart is based on 50 fill of 4 utp category 6 cable o d 21 033lbs ft not maximum loading weight for the tray. Cable are laying in single layer in cable tray. Distance between each cable is 10mm. 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.

The cable tray sizing equals the width times the loading depth. Minimum allowable tray. B cables smaller than 4 0 awg kcmill 120 sq mm ladder type cable tray.