support. Although the use of cable tray fittings is not mandatory, it is often desirable to use them when possible to improve the appearance of the installation.

392.5.Construction Specifications. (F) Nonmetallic Cable Tray.

This type of cable tray is usually made of Fiberglass Reinforced Plastic (FRP). Applications for FRP cable tray systems include some corrosive atmospheres and where non-conductive material is required. B-Line fiberglass cable tray systems are manufactured from glass fiber reinforced plastic shapes that meet ASTM flammability and self- extinguishing requirements. A surface veil is applied during pultrusion to ensure a resin rich surface and increase ultraviolet resistance, however, for extended exposure to direct sunlight, additional measures, such as painting the tray, are sometimes employed

to insure the longevity of the product. Ambient temperature is also a design consideration when FRP cable tray is used. An ambient temperature of 100°F will decrease the loading capacity of poltester resin fiberglass cable tray by 10%.

392.6. Installation. (A) Complete System.

This section states that cable tray systems can have mechanically discontinuous segments, and that the mechanically discontinuous segment cannot be greater than 6 feet. A bonding jumper sized per Section 250.102 is necessary to connect across any discontinuous segment. The bonding of the system should be in compliance with Section 250.96.

Bonding

Jumper

Cable Tray Elevation Change Without Fittings

 

 

 

 

6

8

 

 

 

 

 

 

 

 

 

 

 

 

5

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

 

 

 

 

10

 

2

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

11

12

 

13

 

 

 

 

 

9

 

 

 

 

 

 

 

18

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

 

 

17

 

14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Typical Cable

 

 

 

 

 

 

 

Tray Layout

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nomenclature

 

 

 

 

 

 

1.

Ladder Type Cable Tray

10.

30° Vertical Inside Bend, Ladder Type Tray

 

 

2.

Ventilated Trough Type Cable Tray

11.

Vertical Bend Segment (VBS)

 

 

3.

Splice Plate

 

12.

Vertical Tee Down, Ventilated Trough Type Tray

 

 

4.

90° Horizontal Bend, Ladder Type Tray

13.

Left Hand Reducer, Ladder Type Tray

 

 

5.

45° Horizontal Bend, Ladder Type Tray

14.

Frame Type Box Connector

 

 

6.

Horizontal Tee, Ladder Type Tray

15.

Barrier Strip Straight Section

 

 

7.

Horizontal Cross, Ladder Type Tray

16.

Solid Flanged Tray Cover

 

 

8.

90° Vertical Outside Bend, Ladder Type Tray

17.

Cable Channel Straight Section, Ventilated

 

 

9.

45° Vertical Outside Bend, Ventilated Type Tray

18.

Cable Channel, 90° Vertical Outside Bend

 

 

 

 

 

 

 

Cable Tray Manual

 

 

 

Cooper B-Line, Inc

21

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Cooper Bussmann CT02MAN manual Construction Specifications. F Nonmetallic Cable Tray, Installation. a Complete System