GE Industrial Solutions Spectra II Series Plug-in and Feeder Busway with BlueCoat Epoxy Insulation System - Manual (Page 8)

Spectra and Spectra II Series™ Plug-In and Feeder Busway
Installing and Removing Spectra Busway Plugs
6
7. Install the next length and make the joint
assembly (see the instructions for joining
lengths below).
8. If springs are furnished, they must be adjusted
as shown in Figure 6 at this time. Determine
the required dimension H of the hanger
springs, found on the layout drawing or by
using the formula,
Using the final adjusting nuts (E), set the
springs on the hangers to the dimension H.
With the springs adjusted, hold nut (E) in
position and tighten jam nut (F) against nut (E)
to retain the spring setting. Tighten all jam
nuts (F) using this procedure.
Note that when you are calculating the
dimension H for the bottom floor of a riser with
an elbow and busway directly below the floor,
the following must be included in the footage
calculation:
• Busway below the floor to the elbow,
• The elbow,
• 8 feet of horizontal busway.
For the riser to function as a free end, the last
horizontal hanger must be 8 feet from the
bottom elbow.
9. After the busway run is installed and all ―H‖
dimensions are set to the required settings,
starting at the top hanger raise the initial
adjusting nuts (D) of all hangers to the top of
the spring studs. The studs are crimped to hold
the nuts in the uppermost position.
NOTE: Failure to properly adjust the spring
hangers could damage the bus and void the
warranty.
Figure 5. Rigid riser hanger installation.
Figure 6. Spring riser hanger installation
Figure 6A. Seismic Spring riser hanger installation (Cat No:
SBSR”X”)
H = 5 5
8
5
8
– W
150

W =
Busway wt / ft

ft /floor + devi ces on floor
Total number of springs / floor