Technical Bulletin
StructuredGround
™
Mechanical Connectors
17
• Combine with heavy duty bronze ground clamp
bases to bond water pipes to rigid conduits and to
copper conductors in EMT and rigid conduit
• When used with heavy duty bronze ground clamp
bases, installation exibility is increased, while
inventory costs are decreased when compared
with stocking complete clamp assemblies
• Heavy duty construction for increased durability
• Made from high strength, electrolytic cast bronze
• Zinc plated steel hardware
• Wire range-taking capability minimizes inventory
requirements, saves cost
• cULus 467 Listed for grounding and bonding
Part Number
Conductor Size Range
(AWG)
Conduit Hub Size
(In.) Figure No.
Figure Dimensions
(In.)
Std.
Pkg.
Qty.
A
GHCH4/0-C #8 SOL – 4/0 STR — 1 1.89 100
GHCH2/0-12-L #10 SOL – 2/0 STR 1/2 2 2.30 50
GHCH3/0-34-L #10 SOL – 3/0 STR 3/4 2 2.42 50
GHCH3/0-1-L #10 SOL – 3/0 STR 1 2 2.39 50
Heavy Duty Bronze Hubs
Figure 1
Figure 2
Part Number
Conductor Size
Range (AWG)
Ground
Rod Size
(In.)
Figure Dimensions (In.)
Hex Head Size
(In.)
Std.
Pkg.
Qty.
A C
Standard Duty
GRC4-38-TL #10 SOL – #4 STR 3/8 1.00 0.82 1/2 250
GRC2-12-TL #10 SOL – #2 STR 1/2 1.19 0.68 1/2 250
GRC2-58-TL #10 SOL – #2 STR 5/8 1.34 0.64 1/2 250
GRC2-34-T #10 SOL – #2 STR 3/4 1.48 0.71 1/2 200
WB12-L #10 SOL – #2 STR 1/2 1.28 0.88 1/2 50
WB34-X #8 STR – 1/0 STR
#8 STR – #2 STR
5/8
3/4
1.54 1.03 1/2 10
WB58-Q #8 STR – 1/0 STR 5/8 1.40 1.04 1/2 25
Heavy Duty
GRCH2-12-T #10 SOL – #2 STR 1/2 1.25 0.82 1/2 200
GRCH1/0-58-T #8 SOL – 1/0 STR 5/8 1.42 0.99 1/2 200
GRCH1/0-34-E #8 SOL – 1/0 STR 3/4 1.60 0.97 1/2 20
• Used for grounding copper conductor parallel to
ground rods
• Made from high strength, seamless electrolytic bronze to
provide long term durability
• High strength phos bronze hardware provides long term
reliable assembly
• cULus 467 Listed for grounding and bonding and
suitable for direct burial in earth or concrete - for type
GRC and GRCH
• UL Listed and CSA Certied for grounding and bonding
and suitable for direct burial in earth or concrete - for
Type WB
Bronze Ground Rod Clamps, Direct Burial
A
A
A
A
A
C
C
A
B
RATED
D