Cable Tray Size Calculation

Cable are laying in single layer in cable tray.

Cable tray size calculation.

Ignore the neutral and earth conductor in three phase cables. Cable trays may be filled 50 when using control or signal wiring. On tue dec 2 2014 at 7 52 pm electrical notes articles wrote. Distance between each cable is 10mm.

Voltage drop choose the maximum percentage of the source voltage drop. 6 once all cable information is entered hit calculate. December 2 2014 at 3 38 pm. 13 responses to calculate size of cable tray excel sheet atta khan says.

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 raceway tray support calculations. 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. Chart is based on 50 fill of 4 utp category 6 cable o d 21 033lbs ft not maximum loading weight for the tray.

Distance enter the one way length of the wires in the circuit in feet. It is recommended not to exceed a voltage drop of 5. Number of cable per trench is 1 number of run of cable is 1 run. Cable tray should be perforated and 20 spare capacity.

Cable tray is a bridge that allows safe transport of wires across open areas and gives protection against the overheating and fire problems. Select a cable size or select auto. 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. An example how to calculate voltage drop and size of electrical cable photo credit.

Cable tray is sized based on the number and type of cables required for the current and future need. What is cable tray used for. Calculate size of cable tray for following cable schedule. The sum of the cross sectional areas of all cables cannot exceed 50 of the trays fill area.

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 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. A 50 fill ratio should equal the maximum number of cables pulled in a given cross section.