Cut Sheet

51
Technical Data TD01701001E
Effective March 2017
UL low-voltage busway
Pow-R-Way III
EATON www.eaton.com
Installation data
Hoisting and positioning busway
Pow-R-Way III is manufactured with two sets of lifting eyes at
the ends of each piece to facilitate the hoisting and positioning
of the busway during installation. Refer to Figure 79 for location
of lifting eyes.
Figure 79. Hoisting riser and horizontal busway
Busway joint assembly
When connecting sections of busway, the following guidelines must
be followed:
1. Carefully read NEMA publication BUI.1 provided with the busway
before installing equipment.
2. Contact surfaces must be kept clean and free of all contaminants.
3. Align the (factory installed) Pow-R-Bridge end of the piece being
positioned with the non-bridge joint end of the adjacent section.
Confirm that the “T” and “F” labels of both sections are in the
same plane. Failure to do so will result in an improper installation
with the phase bars of the connected sections out of sequence.
Then, slide the two sections together until the bus bars of the
non-bridge section contact the stopping lances of the bridge joint
conductor bars of the section being positioned.
Figure 80 illustrates examples of incorrect and correct connections.
Obviously, the installation is incorrect if the bridge joint is missing,
but the busway will also be improperly installed if the “T” label
of the bridge joint is not in the same plane as the “T” label of
the busway.
Incorrect Joint Assembly:
No Pow-R-Bridge
Incorrect Joint Assembly:
”T“ and ”F“ Labels Misaligned
Correct Joint Assembly
Figure 80. Bridge joint installation
Torque indicating bolt (Figure 81)
The torque indicating bolt is a double-headed bolt designed
to ensure that proper installation torque is achieved. Fall-away
instruction labels are provided between the upper and lower bolt
heads. A standard wrench with a (minimum) 14.00 inch (355.6 mm)
handle should be used to complete the joint installation. Torque
should be applied to the upper head only and as when the proper
value is achieved. This bolt head will shear off allowing the tag to fall
to the floor. Any joint that is improperly torqued will retain the highly
visible tag and should be retightened. The lower bolt head remains
intact for future maintenance and a label is provided on the bridge
joint with the proper torque requirements.
Figure 81. Torque indicating bolt
ote:N For maintenance or relocation torque from 55 to 65 ft–lb
using a torque wrench.
Yellow
Instruction
Label
For initial installation, tighten
until outer head shears off.
Use a 14-inch (355.6 mm) or
longer wrench.
Torque Indicating Bolt
as Shipped
Torque Indicating Bolt
After Installation