Specification

Thomas and Betts Corporation
Product Guide Specification
COMPRESSION AND MECHANICAL GROUNDING CONNECTORS
26 05 26.01-9
REVISION 0
H. Grounding Connectors:
1. Blackburn® K1 bronze jumper clamp
a. Blackburn® K1 bronze jumper clamp shall be used to make connections between
aluminum or galvanized steel and copper or copper bonded steel wire.
b. Blackburn® K1 bronze jumper clamp shall have a silicon-bronze bolt and
lockwasher to minimize loosening.
c. Blackburn® K1 bronze jumper clamp shall have a parallel groove design to
eliminate bolt removal for installation.
2. Blackburn® TTC transformer tank ground connectors
a. Blackburn® TTC transformer tank ground connectors shall fit on all standard EEI-
NEMA distribution transformers.
b. Blackburn® TTC transformer tank ground connectors shall have a 1/2"-13 stud for
grounding conductors from #8 to 2/0 AWG.
c. Blackburn® TTC2 transformer tank ground connectors shall have a rotating eyebolt
for accommodating cable in either vertical or horizontal direction.
3. Bronze ground connectors for copper 2709 T series
a. Bronze ground connectors for copper 2709 T series shall support a conductor
range of #8 to 1000 kcmil.
b. Bronze ground connectors for copper 2709 T series shall be made of high strength
bronze for corrosion resistance and durability.
c. Bronze ground connectors for copper 2709 T series shall be supplied with a copper
alloy ¼” bolt, washer and nut.
d. Bronze ground connectors for copper 2709 T-1 series shall support one ground
conductor to flat.
e. Bronze ground connectors for copper 2709 T-2 series shall support two ground
conductors to flat.
4. Bronze ground connectors for copper 2709 and 2710 series
a. Bronze ground connectors for copper 2709 and 2710 series shall support a
conductor range of #8 to 1000 kcmil.
b. Bronze ground connectors for copper 2709 and 2710 series shall be made of high
strength bronze for durability and corrosion resistance.
c. Bronze ground connectors for copper 2709 and 2710 series shall be supplied with
a ¼” copper alloy bolt, washer and nut.
d. Bronze ground connectors for copper 2709-1 series shall come with one bolt and
support one ground conductor.
e. Bronze ground connectors for copper 2709-2 series shall come with one bolt and
support two ground conductors.
f. Bronze ground connectors for copper 2710-2 series shall come with two bolts and
support two ground conductors.
5. Ground connector series type 2752 and 2755
a. Ground connector series type 2752 shall be used for running 2 or 3 conductors
parallel to pipe or rod.
b. Ground connector series type 2752 shall cover standard pipe sizes from 1/4" to 2”
and rod diameter range from 1/2" to 1-1-/4”.
c. Ground connector series type 2752 shall handle a conductor range from #8 AWG
to 750 kcmils.
d. Ground connector series type 2752 shall be made from bronze alloy.
e. Ground connector series type 2755 shall be used for running one conductor
parallel perpendicular to pipe or rod.
f. Ground connector series type 2755 shall cover standard pipe sizes from 1/4" to 6”
and rod diameter range from 1/2" to 1-1-/4”.
g. Ground connector series type 2755 shall handle a conductor range from #8 AWG
to 750 kcmils.
h. Ground connector series type 2755 shall be made from bronze alloy.
i. Ground connector series types 2752 and 2755 shall be in accordance to NEMA
standard CC1.