Cable Tray Loading Classes

Class 3 tray fittings are designed for use with cable trays with.

Cable tray loading classes.

Styles of tray there are three different styles of cable tray. Class 2 tray fittings are designed for use with nema class 20a 20b and 20c cable trays. This is the total weight of cables in the tray. The nema classes are based on cable loads of 50 75 and 100 per lineal foot.

2 select the tray class load capacity loading the standard classes of cable trays as related to their maximum design loads and to the associated design support spacing based on a simple beam span requirement shall be designated in accordance with table 1. Ladder ventilated solid select tray size width and height code cable tray systems are manufactured to conform to the standard load classes of csa as follows. Ladder ventilated solid 4. Csa class code side rail esignation designation height rated load rated span kg m m 97 97 112 112 di c6 d3m 102 150.

These systems have 1 1 8 wide side rail flanges and 4 hole splice plates. Class 1 tray fittings are designed for use with nema classes 12b and 12c cable trays. See nema ve 1 and manufacturer s data. Cable load foot 49 cables 20 lb 1000 ft.

For purposes of selecting. In 1948 thomas jefferson cope developed the first modular cable tray system and introduced it to the electrical industry. Below is the data for quick tray wire mesh cable tray fill table at 50 fills. Cable load working load the cable load or the working load is the total weight of the cables to be placed in the tray.

This is the total weight of cables in the tray. Nema ve 1 this standard specifies the manufacturing requirements for metal cable trays such as. Which is subject to change at any time. Cope is the original brand of cable tray.

Code cable tray systems are manufactured to conform to the standard load classes of csa as follows. Cable load working load the cable load or the working load is the total weight of the cables to be placed in the tray. Size the width of cable tray and the load rating for expansion and additions. Select the type of traythere are three different types of cable tray.

These systems have 2 wide side rail flanges and 4 hole splice plates. The number and type of conductors that can be installed in a cable tray is also limited by the weight of the cables and other load factors for the cable tray for a given load rated cable tray. The nema classes are based on cable loads of 50 75 and 100 per lineal foot. Please note the load ratings in table 1 are those most commonly used.

Select tray sizethere are different widths and heights of cable tray and what you require will depend on number size spacing and weight of.