Cable Tray Size Calculation

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 size calculation.

What is cable tray used for. Cable tray should be perforated and 20 spare capacity. Distance between each cable is 10mm. Distance enter the one way length of the wires in the circuit in feet.

On tue dec 2 2014 at 7 52 pm electrical notes articles wrote. December 2 2014 at 3 38 pm. 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.

The number of cores in the cable. 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. 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.

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. This is typically in a raceway cable tray or conduit in a cable burried in the earth or in open air. Select a cable size or select auto. Number of cable per trench is 1 number of run of cable is 1 run.

The sum of the cross sectional areas of all cables cannot exceed 50 of the trays fill area. 13 responses to calculate size of cable tray excel sheet atta khan says. An example how to calculate voltage drop and size of electrical cable photo credit. 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. A 50 fill ratio should equal the maximum number of cables pulled in a given cross section. Ignore the neutral and earth conductor in three phase cables. 6 once all cable information is entered hit calculate.

It is recommended not to exceed a voltage drop of 5. Per the national electrical code article nema 392 9 b cable tray fill calculations and cable tray sizing calculations will be computed as follows. Voltage drop choose the maximum percentage of the source voltage drop. Cable tray is sized based on the number and type of cables required for the current and future need.