Cable Tray Size Calculation

It is recommended not to exceed a voltage drop of 5.

Cable tray size calculation.

The number of cores in the cable. Cable raceway tray support calculations. 6 once all cable information is entered hit calculate. This is typically in a raceway cable tray or conduit in a cable burried in the earth or in open air.

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. 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. Per the national electrical code article nema 392 9 b cable tray fill calculations and cable tray sizing calculations will be computed as follows.

What is cable tray used for. The sum of the cross sectional areas of all cables cannot exceed 50 of the trays fill area. 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.

Auto will automatically select the smallest cable that meets the three criteria for current rating voltage drop and fault current rating. December 2 2014 at 3 38 pm. On tue dec 2 2014 at 7 52 pm electrical notes articles wrote. 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.

Voltage drop choose the maximum percentage of the source voltage drop. Cable trays may be filled 50 when using control or signal wiring. Cable are laying in single layer in cable tray. Distance between each cable is 10mm.

Cable tray should be perforated and 20 spare capacity. Distance enter the one way length of the wires in the circuit in feet. A 50 fill ratio should equal the maximum number of cables pulled in a given cross section. Chart is based on 50 fill of 4 utp category 6 cable o d 21 033lbs ft not maximum loading weight for the tray.

13 responses to calculate size of cable tray excel sheet atta khan says. Calculate size of cable tray for following cable schedule. Number of cable per trench is 1 number of run of cable is 1 run. Select a cable size or select auto.