Cable Tray Support Span

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Cable tray support span.

The nema classifications for cable tray were established to simplify and standardize the specification of cable tray. Vertical cable tray elbows at the bottom of runs should be supported at the top of the elbow and within 610mm of the joint at the bottom of the elbow. One or more spans iec 61537 7 3i for installations with more than one span it is important to notice that the loading capacity is not the same form one end to the other. The support span should not be greater than the straight section length.

Select the type of traythere are three different types of cable tray. This classification is based on the working load the total weight of the cables and the support span the distance between supports. Cable tray is a mechanical support system for cables and raceways. The cable tray institute cti was founded in 1991 to support the cable tray industry by engaging in research development education and the dissemination of information designed to promote enhance and increase the visibility of the industry.

Support load calculation per iec 61537. Ladder ventilated solid 4. Support spans support span is the distance between the supports. On each side of an expansion connection.

The basic types of cable tray supports are. Section 2 manufacturing standards 2 1 materials. Cable tray support a device which provides ad equate means for supporting cable tray sections and fittings. Vertical cable tray elbows at the top of runs should be supported at the joint on each end.

Using cable trays as walkways can cause personal injury and also damage cable tray and installed cables. The nema classes are based on cable loads of 50 75 and 100 per lineal foot. Hazardous voltages in electrical equipment can cause severe personal injury or death. Cable tray support span the distance between the center lines of supports.

Vertical straight lengths should be supported at intervals dictated by the building structure not to exceed 20 ft. Evenly distributed load 2 x point load support distance. A support should be located 2 ft. Cable traysystem component used for cable support consisting of a base with integrated side members or a base connected to side members.

Select tray sizethere are different widths and heights of cable tray and what you require will depend on number size spacing and weight of the cables in the tray. Do not use a cable tray as a walkway ladder or support for people. Cable tiesis a type of fastener especially used for binding and organising several cables or wires together or to a cable management system. Snaptrack tray standard 20 lengths.

Cable load working load the cable load or the working load is the total weight of the cables to be placed in the tray.