Cut Sheet

5
Technical Data TD01701001E
Effective December 2013
UL low voltage busway
Pow-R-Way III
EATON www.eaton.com
Pow-R-Bridge (Figure 7)
Pow-R-Way III joint connections are made with the Pow-R-Bridge
joint package, which is installed on each section of busway prior
to shipment. A double-headed, torque-indicating bolt is provided
to ensure that proper installation torque is achieved. Fall-away
instruction tags are furnished on the torque-indicating bolt heads to
allow for visual inspection from a distance. When the proper torque
value is achieved, the top bolt head will shear off and allow the tag
to fall to the floor. Any joint that is improperly torqued will retain the
highly visible (caution yellow) tag at the bolt head.
The Pow-R-Bridge can provide an adjustment of ±0.50 inch (12.7 mm)
at each joint. Over adjustment is prevented by the joint covers, which
will only allow a 0.50 inch (12.7 mm) adjustment to be made and
by stopping lances on the conductor bars of the Pow-R-Bridge. The
non-rotating design of the Pow-R-Bridge maintains its configuration
integrity when it has been removed from a section of busway.
The conductors and insulators will not displace or swivel, making
reinstallation of the Pow-R-Bridge quick and easy.
Outdoor Pow-R-Bridge (Figure 8)
Joint connections for outdoor feeder as well as sprinkler-proof
plug-in busway are made with a weatherized version of the
Pow-R-Bridge joint. This two-piece design allows for an ingress
protection rating of IP66. This reusable design is made by using
special ground plates designed to work with a top and bottom joint
cover to form a weatherized seal. This UL Listed package comes
with drain plugs and an access cap to the torque bolt per the
UL standard.
Table 2. Busway Pow-R-Bridge Joint Dimensions
UL 857
Ampere Rating
Figure 9
Configurations
Dimensions in Inches (mm)
W L
Copper
225 A 4.50 (114.3) 7.38 (187.5)
400 A 4.50 (114.3) 7.38 (187.5)
600 A 4.50 (114.3) 7.38 (187.5)
800 A 4.50 (114.3) 7.38 (187.5)
1000 A 5.12 (130.0) 7.38 (187.5)
1200 A 5.62 (142.8) 7.38 (187.5)
1350 A 6.12 (155.4) 7.38 (187.5)
1600 A 7.12 (180.9) 7.38 (187.5)
2000 A 8.38 (212.9) 7.38 (187.5)
2500 B 10.88 (276.4) 7.38 (187.5)
3200 C 15.88 (403.4) 7.38 (187.5)
4000 C 18.38 (466.9) 7.38 (187.5)
5000 D 23.41 (594.6) 7.38 (187.5)
Aluminum
225 A 4.50 (114.3) 7.38 (187.5)
400 A 4.50 (114.3) 7.38 (187.5)
600 A 4.50 (114.3) 7.38 (187.5)
800 A 5.62 (142.8) 7.38 (187.5)
1000 A 6.12 (155.4) 7.38 (187.5)
1200 A 7.12 (180.9) 7.38 (187.5)
1350 A 8.38 (212.9) 7.38 (187.5)
1600 B 9.12 (231.6) 7.38 (187.5)
2000 B 10.88 (276.4) 7.38 (187.5)
2500 C 18.38 (466.9) 7.38 (187.5)
3200 D 19.88 (505.0) 7.38 (187.5)
4000 D 23.41 (594.6) 7.38 (187.5)
Bridge Joint
Pressure Plate
(Top & Bottom)
Double-headed
Torque-Indicating
Bolt (Bottom)
Belleville
Washer
Ground Path Plate
Bridge Joint
Retainer Screw
Ground Path
End Block
130º Epoxy
Insulation
on Bars
.375-16 flg.
Head Hex Bolt
(4 per Cover)
Joint Cover
Ground
Path Label
Captive Nut
Retainer
Ground Path
End Block
High Strength
Glass Polyester
Insulators
Ground
Path Contact
Surface
1/4-20 flg.
Head Hex Bolt
(4 per cover)
Figure 7. Indoor Bridge Joint Features
Figure 8. Outdoor Bridge Joint Features
Figure 9. Pow-R-Bridge Joint
Drain Plug
Phasing Label
Belleville Washer
High Strength Glass
Polyester Insulators
Pow-R-Bridge Joint
1/4-20 Flange
Head Hex Bolt
Torque Bolt
Access Cap
Closed Cell Neoprene Gasket
Drain Plug
Warning/Ground Path Label
Bottom Joint Cover
Joint Clamp Nut
Ground Path
End Block
Joint Clamp Bolts
Top Joint Cover
Captive Nut Retainer
Ground Plate
Gasketed Moisture
Barrier Plate
Joint Clamp
Spacer