Bronze Ground Beam Clamps Types GBC and GBCH
• Clamp is manufactured from high strength, corrosion resistant copper alloy • Used to ground trailer frames, cable trays, telephone, and CATV pedestals • Design allows copper ground wire installation from four directions • 7/16” hex head bolt installs with cam-wrench, socket, or crescent wrench • Square head bolt installs with pliers when tighter connection is needed • UL 467 listed
Type GBC
Type GBCH
FIGURE DIMENSIONS (IN.) L W H
CATALOG NUMBER
CONDUCTOR RANGE
BEAM BOLT
Square HD 5/16 - 18
GBC-6
6 Sol. - 14 Sol.
1.63
1.00
1.19
Hex HD 5/16 - 18
GBCH-6
Bronze Ground Clamp Connectors Type GM
• Clamp is manufactured from high copper content alloy • Designed to clamp a single copper conductor to a flat surface or 1/4” thick bus bar • Furnished with silicon bronze bolt, nut, and lockwasher for corrosion resistance • Standard catalog items accommodate 1/4” bar; for other applications, specify bar thickness • Suitable for direct burial in earth or concrete • UL 467 listed
FIGURE DIMENSIONS (IN.)
CATALOG NUMBER
CONDUCTOR RANGE 8 Sol. - 4 Str. 4 Sol. - 2/0 Str.
BOLT SIZE
A
B
C
A
GM-1 GM-2 GM-3 GM-4• GM-5• GM-6•
1.25 1.63 2.13 2.38 3.00 3.50
1.00 1.13 1.50 1.63 1.75 1.88
1.63 1.75 2.00 2.50 3.00 3.13
3/8 3/8 1/2 1/2 5/8 5/8
2/0 Sol. - 250 kcmil 300 - 500 kcmil 500 - 750 kcmil 750 - 1000 kcmil
B
C
• UL listing is limited to a maximum wire size of 250 kcmil
259
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