Cooper Bussmann CT02MAN manual Temperature Rise Test

(also see Sections

Temperature Rise Test

Material Thickness: 0.125" Aluminum or 14 Gauge Steel				Cross Section Area,
			13/16"	2 Rails:
	4"	91/2"		Aluminum - 1.00 sq. in.

Steel - 0.76 sq. in.

3/8"

41/2"

4"

0.080" Aluminum or

14 Gauge Steel

Rigid

Adjustable Vertical

3/8" Bolting Hardware

Cable Tray Connectors

Cross Section Cable

Tray Side Rail

Insulated Joints

Fuse (if used)

500 kcmil copper, Type RH Insulation

Current Source

Cable Lug

T

T

T

Cable Lug

C1

C2

C3

T - Temperature Measurement at each Tray Connection C1,

C2, & C3 - Cable Tray Connectors or Bonding Jumpers

Figure 1

(See Page 45 Appendix Sheet 1)

392.7.Grounding. (B) Steel or Aluminum Cable Tray Systems. (3) & (4)

For a cable tray to be used as an EGC the manufacturer must provide a label showing the cross-sectional area available. This also holds true for some mechanically constructed cable tray systems such as Redi-Rail®. Redi-Rail has been tested and UL Classified as an EGC. B-Line's label is shown at the top of page 30.

The cable tray system must be electrically continuous whether or not it is going to serve as the EGC. At certain locations (expansion joints, discontinuities, most horizontal adjustable splice plates, etc.), bonding jumpers will be required. Section 250.96. Bonding Other Enclosures states that cable tray shall be effectively bonded where necessary to assure electrical continuity and to provide the capacity to conduct safely any fault current likely to be imposed on them

99-40

1600 amps max.

99-N1

600 amps max.

99-1620

2000 amps max.

250.92(A)(1) & 250.118(12)).

It is not necessary to install bonding jumpers at standard splice plate connections. The splice connection is UL classified as an EGC component of the cable tray system.

NOTE: The NEC® only recognizes aluminum and steel cable trays as EGC’s. As with all metallic cable trays, stainless steel cable trays must be bonded according to NEC® guidelines. Fiberglass cable trays do not require bonding jumpers since fiberglass is non-conductive.

Cable Tray Manual Cooper B-Line, Inc

29