Cable Tray Size Calculation

Ignore the neutral and earth conductor in three phase cables.

Cable tray size calculation.

Download cable tray and conduit sizing excel sheet free calculator for electrical design engineers to determine the size of cable tray and the wire conduits. Calculate size of cable tray for following cable schedule. 7 once the calculate button has been selected the program will take you to the output page where the tray size needed will be displayed as well as the article of the nec that it falls under. 13 responses to calculate size of cable tray excel sheet atta khan says.

Voltage drop choose the maximum percentage of the source voltage drop. What is cable tray used for. Distance enter the one way length of the wires in the circuit in feet. December 2 2014 at 3 38 pm.

It is recommended not to exceed a voltage drop of 5. Cable tray is a bridge that allows safe transport of wires across open areas and gives protection against the overheating and fire problems. Cable is directed buried in ground in trench at the depth of 1 meter ground temperature is approximate 35 deg. The number of cores in the cable.

This is typically in a raceway cable tray or conduit in a cable burried in the earth or in open air. Distance between each cable is 10mm. An example how to calculate voltage drop and size of electrical cable photo credit. Select a cable size or select auto.

On tue dec 2 2014 at 7 52 pm electrical notes articles wrote. 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 tray is sized based on the number and type of cables required for the current and future need. A 50 fill ratio should equal the maximum number of cables pulled in a given cross section.

The sum of the cross sectional areas of all cables cannot exceed 50 of the trays fill area. 6 once all cable information is entered hit calculate. Number of cable per trench is 1 number of run of cable is 1 run. 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.

Cable are laying in single layer in cable tray. Cable tray should be perforated and 20 spare capacity. Cable raceway tray support calculations. Auto will automatically select the smallest cable that meets the three criteria for current rating voltage drop and fault current rating.