The maximum cable load allowed on the system is called the load capacity.
Cable tray support span distance.
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.
Support of cable tray and ladder is typically done in the same fashion as us installations but generally has fewer restrictions as to loading design.
This classification is based on the working load the total weight of the cables and the support span the distance between supports.
Cable support systems in the international world iec61537 2004.
Cantilever bracket trapeze single rod suspension.
The nema standard.
For purposes of selecting a suitable tray this weight should be rounded off to the next higher nema working allowable load.
This is the total weight of cables in the tray.
Cable tray systems 1 3 tec nema class hnical data the nema classifications for cable tray were established to simplify and standardize the specification of cable tray.
Support points are often trapezes suspended from threaded rod cantilever brackets or other strut systems.
Section 2 manufacturing standards 2 1 materials.
For flexible systems where the cable is not directly fixed to the support system for example a j hanger installation calculations need to be undertaken to determine the required distance between the cable support positions to achieve a set deflection off set.
6 cable ladder and cable tray systems including channel support systems and other associated supports definitions and abbreviations accessory component used for a supplementary function e g.
The nema classes are based on cable loads of 50 75 and 100 per lineal foot.
To join two components together clamp or fix to walls ceilings or other supports covers and cable retainers associated supports bespoke supports for cable tray and cable ladder other than bs 6946 channel.
Support spans support span is the distance between the supports.
Cable supports should be applied either side of the bend.
The basic types of cable tray supports are.
Cable tray support span the distance between the center lines of supports.
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Different standards may use different terms when referring to load capacity but it all boils down to span and cable weight.
Support load calculation per iec 61537 one or more spans iec 61537 7 3i.
