Instrument Cable Tray Calculation

Cable tray should be perforated and 20 spare capacity.

Instrument cable tray calculation. Per nec tray sizing instructions 1 insure that macros have been enabled. Cable trays may be filled 50 when using control or signal wiring. 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.

10 08 03 cable trays a standards i nema ve1 and ve2 ii iec 61537 iii nec 392 b cable trays fittings and accessories shall be fabricated out of rolled mild steel sheets free from flaws such as laminations rolling marks pitting etc. Cable are laying in single layer in cable tray. Total sum of the diameters. Cable tray shall conform to as per nema ve1 or relevant indian standard.

What is cable tray used for. The sum of the cross sectional areas of all cables cannot exceed 50 of the trays fill area. 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. Distance between each cable is 10mm.

Cable tray ladders are categorized by width and height. On tue dec 2 2014 at 7 52 pm electrical notes articles wrote. Cable tray is a bridge that allows safe transport of wires across open areas and gives protection against the overheating and fire problems. Cable tray is sized based on the number and type of cables required for the current and future need.

A minimum clearance of 9 in 22 9 cm should be maintained between the top of a tray and beams piping etc to facilitate installation of cables in the tray. Cable raceway tray support calculations. Per the national electrical code article nema 392 9 b cable tray fill calculations and cable tray sizing calculations will be computed as follows. Most project specified the height of the ladder tray so that the entire system will fit with each other while width can be adjusted by reducers enlargers.

Practical guide on the amount of cable weight that can be installed tested in accordance with nema ve 1 csa e222 2 126 1. Calculate size of cable tray for following cable schedule. A 50 fill ratio should equal the maximum number of cables pulled in a given cross section. 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.

3 use the pull down menu to choose the type of cables being used and answer any of the pop up questions. Maximum allowable tray fill per area in 2 tray design depth sum of od in total cross sectional areas of all cables.