According to nec 392 9 b when using ventilated tray with multi conductor control cable the sum of the cross sectional areas shall not exceed 50 percent of the interior cross section of the cable raceway tray.
Ladder cable tray weight chart.
The corrosion resistance of steel varies widely with coating and alloy.
The nema classes are based on cable loads of 50 75 and 100 per lineal foot.
1 straight cable tray sections aluminum rail height load depth select from chart above a620c 09 sl20 24 g straight length catalog numbers.
All able tray side rails rungs and splice plates are numbered for material traceability.
Cable tray and ladder systems as the industry leader in cable tray eaton offers one of the widest ranges of b line series cable management solutions available in the market today.
With unmatched quality and service we offer a variety of styles materials and finishes available to support virtually any commercial and industrial cable.
For purposes of selecting a suitable tray this weight should be rounded off to the next higher.
Cable tray is one of the most common methods of supporting wire and cable.
Chart is based on 50 fill of 4 utp category 6 cable o d 21 033lbs ft not maximum loading weight for the tray.
Quick tray wire mesh.
Plastic cable trays 60 mm side height standard support width 1 5 m55 cable trays 1 this chapter contains an overview of the rico cable tray systems for various loads and applications subdivided into product families.
Wire mesh cable tray fill ratio cross section of cable cross section of tray.
There are many different types of cable tray including basket ladder and solid bottom tray can be manufactured in various types of material including aluminum steel and fiber and other nonmetallic materials.
Cable tray must be supported on spans shorter than or equal to the length of the cable tray being installed.
See system pictures 1 to 6 table of contents page.
Cable load working load the cable load or the working load is the total weight of the cables to be placed in the tray.
90 7 kg concentrated load applied at the mid span of the rung over and above the nemarated cable load with a 1 5 safety factor for highlighted nema spans and loads.
The quick tray wire mesh cable tray fill table below shows the number of cables and the load in lbf lineal foot developed by typical 4 pair and 6 pair cable weighing 20 lb kft and 40 lb kft respectively while this table is a useful guide actual loads must be calculated using the cable specified.
Aluminum cable tray aluminum cable trays are fabricated from structural grade copper free aluminum extrusions.
Cross section of the tray.
This is the total weight of cables in the tray.
Individual rungs will support without collapse a 200 lb.
