Selection Guide

42 BLACKBURN GROUNDING SYSTEMS
Cat. no. Clamp type Conduit size (in.)
 Swivel

 –


 Straight

 –


 Swivel 


 Straight 


 Swivel 

 
 Swivel 

 
 Swivel 

 
Cat. no. Description Conductor size (AWG)
TGC Square-head tin-plated steel bolt 
Listed to UL
®
467
—
Ground clamps
Tray clamps & beam grounding clamp
For aluminum and steel cable trays
with regular or reinforced flanges.
• Serrations and biting teeth on clamping saddle
provide a high-quality bond between conduit
and clamp
• Can be clamped to any position in a 90° arc
• Hardened steel screws bite into tray and
provide positive bond
• Malleable iron hub and steel U-bolt accept
conduit from any angle
Efficiently grounds trailer frames, cable trays,
CATV and telephone pedestals.
• Connects #6 to #14 solid copper conductor to
metal frames where continuity of grounding
can be assured
•
7
16" silicon bronze hex-head bolt installs with
cam-wrench, socket or crescent wrench
• Tin-plated square-head bolt enables installation
with pliers when tighter ground connection
is needed
• Ground wire hole access from four directions
minimizes need to bend ground wire
• Designed so ground wire may be installed on
clamp prior to mounting clamp on metal frame,
reducing installation time
• Beam and ground wire connection can be
tightened separately with disconnecting integrity
of ground circuit
• High-strength copper alloy (91% nom.) provides
greater conductivity, durability and corrosion
resistance without the need for plating
• High-strength anchoring bolt penetrates paint
or metal oxide
—
Tray clamps
—
Beam grounding clamp