Ladder ventilated solid 4.
Cable tray loading classes.
The nema classes are based on cable loads of 50 75 and 100 per lineal foot.
In 1948 thomas jefferson cope developed the first modular cable tray system and introduced it to the electrical industry.
Nema ve 1 this standard specifies the manufacturing requirements for metal cable trays such as.
Size the width of cable tray and the load rating for expansion and additions.
Styles of tray there are three different styles of cable tray.
For purposes of selecting.
This is the total weight of cables in the tray.
Class 1 tray fittings are designed for use with nema classes 12b and 12c cable trays.
Below is the data for quick tray wire mesh cable tray fill table at 50 fills.
Class 3 tray fittings are designed for use with cable trays with.
This is the total weight of cables in the tray.
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.
Cope is the original brand of cable tray.
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.
Cable load working load the cable load or the working load is the total weight of the cables to be placed in the tray.
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.
Channel cable tray ladder cable tray single rail cable tray wire mesh cable tray solid bottom or nonventillated cable tray and trough or ventilated cable tray and associated fittings for use in accordance with the rules of the national electrical code.
Please note the load ratings in table 1 are those most commonly used.
These systems have 2 wide side rail flanges and 4 hole splice plates.
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.
These systems have 1 1 8 wide side rail flanges and 4 hole splice plates.
Cable load foot 49 cables 20 lb 1000 ft.
This table for cable tray sizes is provided by hoffman enclosures inc.
Which is subject to change at any time.
Select tray sizethere are different widths and heights of cable tray and what you require will depend on number size spacing and weight of.
Csa class code side rail esignation designation height rated load rated span kg m m 97 97 112 112 di c6 d3m 102 150.
Select the type of traythere are three different types of cable tray.
