Cooper Bussmann CT02MAN - Manual (Page 31)

29
Cable Tray Manual Cooper B-Line, Inc
Material Thickness: 0.125" Aluminum or 14 Gauge Steel Cross Section Area,
2 Rails:
Aluminum - 1.00 sq. in.
Steel - 0.76 sq. in.
13 / 16 "
3 / 8 "
0.080" Aluminum or
14 Gauge Steel
3 / 8 " Bolting Hardware
Cross Section Cable
Tray Side Rail
Adjustable Vertical Rigid
Cable Tray Connectors
4 1 / 2 "
9 1 / 2 "
4"
4"
Figure 1
(See Page 45 Appendix Sheet 1)
Temperature Rise Test
C1
T T T
C2 C3
Current Source
500 kcmil copper, Type RH Insulation
Insulated Joints
Cable Lug
Fuse (if used)
Cable Lug
T - Temperature Measurement at each Tray Connection C1,
C2, & C3 - Cable Tray Connectors or Bonding Jumpers
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
(also see Sections
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.
99-N1
600 amps max.
99-40
1600 amps max.
99-1620
2000 amps max.