Project Description

Safety:
Temporary personal protective equipment is designed for one purpose only, to protect the worker.
Grounding equipment should be manufactured to and maintained to the highest standards.
Standards:
Very stringent requirements are specified by the ASTM F855 standard. While this is a voluntary
standard, we design all our clamps, cables and ferrules to exceed the values of this standard.
The withstand values from ASTM are:

Grade 15 Cycle
(kA)

30 Cycle
(kA)

Cable Size
(Copper)

Continuous
Current
Rating
A RMS
1 14 10 #2 200
2 21 15 1/0 250
3 27 20 2/0 300
4 34 25 3/0 350
5 43 30 4/0 400

Quality:
Whether it’s the machining of the casting, the assembly of the clamp, or the assembly of the complete
grounding or jumper assembly, we pride ourselves in the quality of the product that is created at Hast-
ings. Every employee that handles the parts is vigilant for any quality issues.
Material:
Clamps are available in either bronze alloy or aluminum alloy metals. Great care is taken in selecting the
best materials for the performance required. The bronze alloys allow for higher strength and higher melt-
ing temperatures. Aluminum alloys allow for lighter weight and less resistance.
Experience:
Hastings works closely with the utility industry in solving grounding problems. Through our close con-
tact with our customers, we stay in touch with their needs and this guides our efforts for future product
designs. Hastings also participates in the development of industry standards.

GROUND CLAMPS FOR SUBSTATION GROUNDING
? The grounding clamps with hanger studs enable substation maintenance crews to utilize their portable grounds on large bus by providing a fault current rated hanger stud as part of the clamp (Clamp numbers 21056, 21546-1, 12282)
? Use of the hanger stud clamps could save cost of special ground assemblies made up for each substation

CAT NO MAIN LINE RANGE
MAXIMUM
MINIMUM

MAXIMUM
SIZE
CABLE

MAXIMUM FAULT
CURRENT RATING

TERMINAL
TYPE

LBS

BRONZE

21056 5” O.D.
1 1/4” O.D. – STUD IS 3.25” LONG

54KA@ 15 CYCLES
39KA@ 30 CYCLES? 4.5

21546-1 3 5/8” X 2 1/4” RECTANGULAR BUS
STUD IS 4” LONG

43KA@ 15 CYCLES 4.4

ALUMINUM

4367-2 4” X 1/2” FLAT BUS OR 2.875 DIA BUS
6 SOL .16 DIA 1/0 21KA@ 15 CYCLES
15KA@ 30 CYCLES

BOLTED? 2.4

4367-1 3” X 3” SQUARE BUS
6 SOLID .16 DIA? 2.4

9071 3” DIA BUS OR CABLE
6 STR .18 DIA? 4/0

54KA@ 15 CYCLES
39KA@ 30 CYCLES

BOLTED 4.2

12282 6.625 DIA BUS
1/0 STR .398 DIA? 4/0 BOLTED 5.5

21057 6.625 DIA / 9 1/2” COPPER BAR
1/0 STR .398 DIA? 4/0 8.7