Specification

Thomas and Betts Corporation
Product Guide Specification
COMPRESSION AND MECHANICAL GROUNDING CONNECTORS
26 05 26.01-6
REVISION 0
C. Mechanical Ground Connectors
1. Mechanical ground connectors shall have a UL listing and/or CSA certification.
2. Mechanical ground connectors shall be of the following series:
a. GTC13 series tower ground clamps
1) GTC13 series tower ground clamps shall be made from high-strength
corrosion resistant copper alloy.
2) GTC13 series tower ground clamps shall use a square shank bolt to prevent
turning while tightening the nut.
3) GTC13 series tower ground clamps shall cover a wire range of 2/0 to 250
kcmil.
b. CTG250 wide-range tower ground clamp
1) CTG250 wide-range tower ground clamp shall be dual rated for both
aluminum and copper conductors.
2) CTG250 wide-range tower ground clamp may be used on aluminum or
galvanized steel cable tray.
3) CTG250 wide-range tower ground clamp shall have a ribbed neck on the bolt
to prevent rotation during tightening of the nut.
4) CTG250 wide-range tower ground clamp shall have a tin plated body.
5) CTG250 wide-range tower ground clamp shall have galvanized hardware.
6) CTG250 wide-range tower ground clamp shall cover a wire range of #2 to
250 kcmil.
c. Aluminum lay-in lug
1) Aluminum lay-in lug shall be of the LL414 series.
2) Aluminum lay-in lug shall be dual rated for both aluminum and copper
conductors.
3) Aluminum lay-in lug shall be made from high-strength, high-conductive
aluminum alloy.
4) Aluminum lay-in lug shall use a slotted of hex drive aluminum set screw.
5) Aluminum lay-in lug shall be an open-faced design to allow easy inserting of
the conductor.
6) Aluminum lay-in lug shall have stud hole diameters of .22”, .27” or .33”.
7) Aluminum lay-in lug shall be rated for 90ºC conductors.
8) Aluminum lay-in lug shall cover a wire range of #14 to 250 kcmil.
d. Copper lay-in lug
1) Copper lay-in lug shall be CULL414 or CULL414TP.
2) Copper lay-in lug shall be made from high-strength, conductive copper alloy.
3) Copper lay-in lug shall be listed for direct burial.
4) Copper lay-in lug shall use a stainless steel slotted set screw.
5) Copper lay-in lug shall have a stud hole diameter of .22”.
6) Copper lay-in lug shall cover a wire range of #14 to #4 AWG.
7) Copper lay-in lug shall be rated for 90ºC conductors.
8) Copper lay-in lug CULL414TP shall be tin plated.
e. Service post connectors
1) Service post connectors shall be of the SP-S (short stud) series of SP-L (long
stud) series.
2) Service post connectors shall be available in single or double conductor
constructions.
3) Service post connectors shall be used to ground one or two copper cables to
steel structure or transformer.
4) Service post connectors shall be made from high-strength, corrosion
resistant copper alloy.
5) Service post connectors shall have hex designed bolts and nuts for easy
installation.
6) Service post connectors shall cover a wire range of #12 to 500 kcmil
stranded copper and #12 to #2 solid copper.