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Electrical Connections
For Illustration Only Shown with 3 Bars in Phase A
and 2 Bar in Phase B and 1 Bar in Phase C
Illustration depicts arrangement with
standard molded glass polyester bus support.
SIDE VIEW
Figure 17. Main Bus Joints—Auxiliary Section
SPACER IF NO
BREAKER IN
UPPER CELL
BREAKER RISER (TYP.)
ONE MAIN BUS BAR
TWO MAIN BUS BARS
ONE 1/4 X 4 COPPER or
TWO 3/8 X 6 COPPER or
ONE 3/8 X 6 COPPER or
TWO 3/8 X 6 ALUMINUM
ONE 3/8 X 6 ALUMINUM
Figure 18. Main Bus Joints Connection Configurations
Courtesy of NationalSwitchgear.com
Molded Glass Polyester Support
A
B
C
MAIN BUS BAR
MAIN BUS (TYP.)
THREE MAIN BUS BARS
THREE 3/8 X 6 COPPER or
THREE 3/8 X 6 ALUMINUM
INSULATION BOOT
REAR VIEW
A
B
C
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