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Temporary Grounding Equipment
Grounding Testing Equipment

To indicate energized conditions on overhead lines, (from left) Chance Auto Ranging Voltage Indicator, Digital Voltage Detector and Multi-Range Voltage Detector. At far right, Energized Cable Sensor performs the same function on URD cable with an exposed concentric neutral and elbows without test points.

Temporary Grounding Equipment Safe Working Practices
Reasons for temporary grounding to protect personnel working on de-energized lines include these five:

  1. Induced voltage from adjacent energized lines,
  2. Fault-current feedover from adjacent lines,
  3. Lightning strikes anywhere on the circuit,
  4. Switching-equipment malfunction or human error,
  5. Accident-initiated contact with adjacent lines.

Since anyone of the above could result in re-energizing the circuit, most utilities treat these potential dangers as ever­present and impose strict temporary-grounding work rules. Their crews' experience often voices these watch-words for the wise to heed:
"If you can't see both ends, it's hot." and
"If it isn't grounded, it isn't dead."

Vital Procedure Recommendations

  • Step One: Testing
    With a test instrument, confirm the circuit to be worked has been de-energized intentionally before ground sets are applied.
  • Step Two: Cleaning
    For a good connection, scrub oxides and contaminants from conductor, buswork or lattice contact points. Chance universal wire brushes make this easy. Serrated-jaw clamps also aid by penetrating surface contaminants.
  • Step Three: Connecting
    Chance insulated clampsticks are the proper tools to apply grounding clamps. To help achieve correct connection tightness, various clampstick lengths and styles are available in Catalog Section 2100, "Insulated Hand Tools."

General Practices
On de-energized distribution lines, Chance recommends Double-Point grounding (at both structures adjacent to work­site: jumpering all three phases together and grounding) plus a personal ground at the worksite (from any one phase to a grounded cluster bar well below the worker's feet). On a system without a neutral, Chance recommends connecting down leads to screw ground rods installed at least 20 feet from all structures and barricaded. Only for maintenance tasks during which grounds need not be replaced does Chance find acceptable the Single-Point grounding method (at only the worksite: jumpering all phases together and grounding plus personal ground, as above).
Where adequate phase-to-phase clearances permit, Chance accepts the practice of grounding only the phase being worked (in the same manner as personal ground, above).

Grounding Set Ratings

Short Circuit Properties A

Continuous Current
Rating, A RMS, 60 Hz

Minimum Cable Size
with Ferrule Installed
Equal or Larger Than

Withstand Rating,
Symmetrical kA RMS, 60 Hz

Ultimate Rating/Capacity, B
Symmetrical kA RMS, 60 Hz

15
cycles
(250
MS)

30
cycles
(500
MS)

Copper Cable
Size

6
cycles
(100
MS)

15
cycles
(250
MS)

30
cycles
(500
MS)

60
cycles
(1 S)

14

10

#2

29

18

13

9

200

#2

21

15

110

48

30

21

15

250

110

27

20

2/0

61

38

27

19

300

2/0

34

25

3/0

76

48

34

24

350

3/0

43

30

4/0

96

60

43

30

400

4/0

54

39

250 kcmil or two 2/0

114

72

51

36

450

250 kcmil or two 2/0

74

54

350 kcmil or two 4/0

159

101

71

50

550

350 kcmil or two 4/0

A Withstand and ultimate short circuit properties are based on performance with surges not exceeding 20% asymmetry factor (see Appendices X3 and X4, ASTM F 855).
B Ultimate rating represents a symmetrical current which the clamp shall carry for the specified time.

Reference:
Derived from ASTMF 855, Standard Specifications for Temporary Protective Grounds to be Used on De-energized Electric Power Lines and Equipment. Copyright ASTM Reprinted with permission.

Safety Reviews & Grounding Sets
Grounding Set

Safety Reviews
On a regular basis, each utility needs to re-examine its temporary grounding practices. As part of the total maintenance program, schedule such routine reviews apart from sessions to set new practices for system upgrades and additions. Among others, include on your review checklist these basics:

  1. Clamp designs specific to each application,
  2. Cable sized for fault-current potential (see table on page 3002) and minimum-slack lengths,
  3. How construction affects placement of grounds,
  4. Work procedures outlined above,
  5. Inspect and test each grounding set.

Ideal for this function is the Chance Grounding-Set Tester.,
It checks the resistance in a protective ground set and can help locate problems often remedied by simple repairs. A how-to video is included with the tester. See Catalog Section 2450, "Instruments and Meters,"for details and ordering information.

Selecting ground clamps and cable
To serve your particular needs, the Chance grounding line comprises both ready-made sets and separate components for your specifications. Among the options and criteria to consider:

  • Functional fit-Sizes of the clamp types in this section appear in ascending order of maximum-main-line size. By design, many clamps serve a wide size range for their conductor type (cable, bus or tower).
  • Adequate capacity-Published ratings for both clamps and cable must withstand maximum-potential system fault-current magnitude and full-time duration. Certified test reports are available on request.
  • Coordinated connectors-Terminal (either pressure-type or threaded-type) selected for clamps dictates the cable ferrule type (either plain or threaded) to match.
  • On-site handling-Application clearances and fit (for overhead conductors and ground wires, transmission tower shapes, URD apparatus or substation buswork) affect clamp and cable dimensions.

How to order a Grounding Set
In addition to the specifying criteria above, each part of a grounding set requires certain choices:
1. Clamps
• ASTM designations for Type, Class and Grade given for clamps shown in this section.
2. Ferrules
• Copper or aluminum.
• Plain or threaded.
3. Cable
• Length required to reach application distances.
• ASTM Type I with black or yellow elastomer jackets for temperatures from -40°F (-40°C) through +194°F (+90°C).
• ASTM Type III with clear thermoplasticjacketfor tempera­tures from +14°F (-100ºC) through +140°F (+60°) should be used only in well-ventilated areas.
4. Support Stud
• This option recommended on only one clamp to help control lifting the set to the first clamp attachment point.
5. Shrink Tubing
• This translucent option recommended for stress relief and inspection of cable strands between ferrule and jacket.

C-Type Grounding Clamps - Page 1
C-Type Grounding Clamps

Catalog Number

C6001959
T6000465
T6000466
T6000790

C6002271

C6001754

C6002275

C6002276

T6002708

C6001743

ELECTRICAL RATINGS

Continuous Current (AMPS)

200

400

350

400

400

400

400

Fault Current - 15 Cycles (AMPS)

21,500

43,000

27,000

43,000

43,000

43,000

43,000

Fault Current - 30 Cycles (AMPS)

15,000

30,000

20,000

30,000

30,000

30,000

30,000

MECHANICAL RATINGS

Recommended Torque (in.-lb.)

200

350

250

250

250

250

250

Main Line Range - Max.

477 kcmil
ACSR
(0.814")

1033 kcmil
ACSR
(1.25")

750 kcmil
Str. Cu.
636 kcmil ACSR
(0.998")

033 kcmil ACSR
(1.25")

1033 kcmil
ACSR
(1.25")

033 kcmil ACSR
(1.25")

1000 kcmil Cu.
1590 kcmil
ACSR (1.50")

Main Line Range - Min.

#6 Sol. Cu.
(0.162")

#6 Sol. Cu.
(0.162")

#8 Sol. Cu.
(0.128")

#8 Sol. Cu.
(0.128")

#8 Sol. Cu.
(0.128")

#8 Sol. Cu.
(0.128")

#6 Sol. Cu.
(0.162")

Jumper Range - Max.

110 Grd. Cable
w/Threaded
Stud

4/0 Grd. Cable
w/Threaded
Stud

2/0 Grd. Cable
w/Threaded
Stud

4/0 Grd. Cable
w/Plain
Plug

4/0 Grd. Cable
w/Plain
Plug

4/0 Grd. Cable
w/Threaded
Stud

4/0 Grd. Cable
w/Threaded
Stud

Jumper Range - Min.

#2 Grd. Cable
w/Threaded
Stud

#2 Grd. Cable
w/Threaded
Stud

#2 Grd. Cable
w/Threaded
Stud

#2 Grd. Cable
w/Plain
Plug

#2 Grd. Cable
w/Plain
Plug

#2 Grd. Cable
w/Threaded
Stud

#2 Grd. Cable
w/Threaded
Stud

Weight Each

1-1/2 lb./0.7kg.

2 lb./0.9kg.

1 lb./0.5kg.

1-1/4. lb./0.6 kg.

1-1/4.lb./0.6kg.

1-1/4. lb./0.6kg.

1-1/2 lb./0.7kg.

ASTM Designation

Type I
Class A
Grade 2

Type I
Class A
Grade 5

Type I
Class A
Grade 3

Type I
Class A
Grade 5

Type I
Class B
Grade 5

Type I
Class B
Grade 5

Type I
Class A
Grade 5

C-Type Grounding Clamps - Page 2
C-Type Grounding Clamps

Catalog Number

 

C6002255

 

C6002256

 

T6003203

T600065S

ELECTRICAL RATINGS

Continuous Current (AMPS)

400

400

400

400

400

400

400

Fault Current - 15 Cycles (AMPS)

43,000

43,000

43,000

43,000

43,000

43,000

43,000

Fault Current - 30 Cycles (AMPS)

30,000

30,000

30,000

30,000

30,000

30,000

30,000

MECHANICAL RATINGS

Recommended Torque (in.-lb.)

250

250

250

250

250

250

250

Main Line Range - Max.

2" O.D. Bus

2" O.D. Bus

2" O.D. Bus

2" O.D. Bus

2" O.D. Bus

2" O.D. Bus

2" O.D. Bus

Main Line Range - Min.

#6 Sol. Cu.
(0.162")

#6 Sol. Cu.
(0.162")

#6 Sol. Cu.
(0.162")

#6 Sol. Cu.
(0.162")

#6 Sol. Cu.
(0.162")

#6 Sol. Cu.
(0.162")

#6 Sol. Cu.
(0.162")

Jumper Range - Max.

4/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Threaded Stud

4/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Threaded Stud

4/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Threaded Stud

4/0 Grd. Cable
w/Threaded Stud

Jumper Range - Min.

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Threaded Stud

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Threaded Stud

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Threaded Stud

#2 Grd. Cable
w/Threaded Stud

Weight Each

2 lb./0.9kg.

1-3/4 lb./0.8kg.

2 lb./0.9kg.

1-3/4 lb./0.8kg.

*

1-3/4 lb./0.8kg.

1-3/4 lb./0.8kg.

ASTM Designation

Type I
Class A
Grade 5

Type I
Class A
Grade 5

Type I
Class B
Grade 5

Type I
Class B
Grade 5

Type II
Class B
Grade 5

Type I
Class A
Grade 5

Type I
Class A
Grade 5

*C6000386 has 1-1/4” x 6' Epoxiglas® Pole and total weight of 3-3/4 lb. (1.7 kg.).

C-Type Grounding Clamps & Bus-Bar Grounding Clamps
C-Type Grounding Clamps
Bus-Bar Grounding Clamps

Catalog Number

G33672

C6001733

C6000375

G3369

C6000337

ELECTRICAL RATINGS

Continuous Current (AMPS)

400

400

400

400

400

Fault Current - 15 Cycles (AMPS)

43,000

43,000

*70,000

43,000

43,000
*60,000

Fault Current - 30 Cycles (AMPS)

30,000

30,000

*50,000

30,000

30,000
*60,000

MECHANICAL RATINGS

Recommended Torque (in.-lb.)

250

250

300

300

300

Main Line Range - Max.

2-1/2" O.D. Bus

2-1/2" O.D. Bus

3" O.D. Bus

4" x 4" Square
4.5" O.D. Bus

6-5/8" O.D. Bus

Main Line Range - Min.

#4 Str. Cu.
(0.232")

#4 Str. Cu.
(0.232")

0.50" O.D.
Bus

4/0 Str. Cu.
(0.500")

3-1/2" O.D. Bus

Jumper Range - Max.

4/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Threaded Stud

4/0 Grd. Cable
w/Threaded Stud

4/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Plain Plug

Jumper Range - Min.

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Threaded Stud

#2 Grd. Cable
w/Threaded Stud

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Plain Plug

Weight Each

2-3/8 lb./1.1kg.

2-3/8 lb./1.1kg.

3 lb./1.4kg.

5 Y4 lb./2.4kg.

6 lb.l2.7 kg.

ASTM Designation

Type I
Class A
Grade 5

Type I
Class A
Grade 5

Type I
Class B
Grade 7

Type I
Class A
Grade 5

Type I
Class A
Grade 6

*Rating with twin-grounding cables.

Snap-On (Duckbill-Type) Grounding Clamps - Page 1
Snap-On Grounding Clamps

Catalog Number

G18102

G36221

*HG37061

T6000806

ELECTRICAL RATINGS

Continuous Current (AMPS)

300

400

400

400

Fault Current - 15 Cycles (AMPS)

28,000

43,000

36,000

43,000

Fault Current - 30 Cycles (AMPS)

20,000

30,000

25,000

30,000

MECHANICAL RATINGS

Recommended Torque (in.-lb.)

250

250

250

250

Main Line Range - Max.

250 kcmil Str. Cu.
410 ACSR
(0.574")

566 kcmil Cu.
900 kcmil ACSR
(1.162")

566 kcmil Cu.
900 kcmil ACSR
(1.162")

1590 kcmil ACSR
(1.625")

Main Line Range - Min.

#6 Sol. Cu.
(0.162")

#6 Sol. Cu.
(0.162")

#6 Sol. Cu.
(0.162")

0.5"

Jumper Range - Max.

2/0 Grd. Cable
w/Plain Plug

4/0 Grd. cable
w/Plain Plug

4/0 Grd. Cable
w/Plain Plug

410 Grd. Cable
w/Plain Plug

Jumper Range - Min.

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Plain Plug

Weight, each

1-1/2 lb./0.6 kg.

1-1/2 lb./0.7 kg.

*

1-3/4 lb./0.8 kg.

ASTM Designation

Type I
Class A
Grade 3

Type I
Class A
Grade 5

Type II
Class A
Grade 4

Type I
Class B
Grade 5

*HG37061 has 1-1/4" x 6' Epoxiglas@ Pole and total weight of 3-1/2 lb. (1.6 kg.).

Snap-On (Duckbill-Type) Grounding Clamps
Snap-On Grounding Clamps

Catalog Number

C6001734

*C6000198

C6000197

C6000434

ELECTRICAL RATINGS

Continuous Current (AMPS)

400

400

400

400

Fault Current - 15 Cycles (AMPS)

43,000

43,000

43,000

43,000

Fault Current - 30 Cycles (AMPS)

30,000

30,000

30,000

30,000

MECHANICAL RATINGS

Recommended Torque (in. - lb.)

250

250

250

250

Main Line Range - Max.

566 kcmil Cu.
900 kcmi] ACSR
(1.162")

950 kcmil Cu.
1510 kcmil ACSR
(1.506")

950 kcmil Cu.
1510 kcmil ACSR
(1.506")

950 kcmil Cu.
1510 kcmil ACSR
(1.506")

Main Line Range - Min.

#6 Sol. Cu.
(.162")

#6 Sol. Cu.
(.162")

#6 Sol. Cu.
(.162")

#6 Sol. Cu.
(.162")

Jumper Range - Max.

4/0 Grd. Cable
w/Threaded Stud

4/0 Grd. cable
w/Threaded Stud

4/0 Grd. Cable
w/Threaded Stud

4/0 Grd. Cable
w/Plain Plug

Jumper Range - Min.

#2 Grd. Cable
w/Threaded Stud

#2 Grd. Cable
w/Threaded Stud

#2 Grd. Cable
w/Threaded Stud

#2 Grd. Cable
w/Plain Plug

Weight Each

1-1/2 lb./0.7 kg.

*

1-1/2 lb./0.7 kg

1-1/2 lb./0.7kg.

ASTM Grade

Type I
Class A
Grade 5

Type II
Class B
Grade 5

Type I
Class B
Grade 5

Type I
Class B
Grade 5

*C6000198 has 1-1/4" x 6' Epoxiglasi® Pole and total weight of 3-1/2 lb. (1.6 kg.).

Cluster Grounding Clamps
Cluster Grounding Clamps
4th Grounding Clamp

Catalog Number

G3405

G3803

ELECTRICAL RATINGS

Continuous Current (AMPS)

350

400

Fault Current - 15 Cycles (AMPS)

28,500

36,000

Fault Current - 30 Cycles (AMPS)

20,000

25,000

MECHANICAL RATINGS

Recommended Torque (in.-Ib.)

250

250

Main Line Range - Max.

400 kcmil Str. Cu.
636 kcmil ACSR
(.998")

566 kcmil Cu.
900 kcmil ACSR
(1.162")

Main Line Range - Min.

#8 Sol. Cu.
(0.12")

#6 Sol. Cu.
(0.162")

Jumper Range - Max.

2/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Plain Plug

Jumper Range - Min.

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Plain Plug

Weight Each

4-1/2 lb./2 kg.

6-5/8 lb./3 kg.

ASTM Designation

Type I
Class A
Grade 3

Type I
Class A
Grade 4

Tower & Flat Face Grounding Clamps - Page 1
Tower & Flat Face Grounding Clamps

Catalog Number

C6002232

G33633SJ

C6001735

C6002231

G33634SJ

T6001798

ELECTRICAL RATINGS

Continuous Current (AMPS)

400

400

400

400

400

400

Fault Current - 15 Cycles (AMPS)

43,000

27,000

27,000

43,000

27,000

27,000

Fault CUITent - 30 Cycles (AMPS)

30,000

20,000

20,000

30,000

20,000

20,000

MECHANICAL RATINGS

Recommended Torque (in.-lb.)

250

250

250

250

250

250

Main Line Range - Max.

1-1/2” Angles
1-1/2” Flat

1-1/2” Angles
1-1/2”  Flat

1-1/2”  Angles
1-1/2” Flat

1-1/2”  Angles
1-1/2” Flat

1-1/2” Angles
1-1/2” Flat

1-1/2” Angles
1-1/2” Flat

Main Line Range - Min.

1/8”

1/8”

1/8”

1/8”

1/8”

1/8”

Jumper Range - Max.

4/0 Grd. Cable
w/Threaded Stud

2/0 Grd. Cable
w/Plain Plug

2/0 Grd. Cable
w/Threaded Stud

4/0 Grd. Cable
w/Threaded Stud

2/0 Grd. Cable
w/Plain Plug

2/0 Grd. Cable
w/Threaded Stud

Jumper Range - Min.

#2 Grd. Cable
w/Threaded Stud

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Threaded Stud

#2 Grd. Cable
w/Threaded Stud

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Threaded Stud

Weight Each

2 lb./0.9 kg.

1-5/8 lb./0.7 kg.

1-1/2 lb./0.7 kg.

2 lb./0.9 kg.

1-5/8 lb./0.7 kg.

1-1/2 lb./0.7kg.

ASTM Designation

Type I
Class B
Grade 5

Type I
Class B
Grade 3

Type I
Class B
Grade 3

Type III
Class B
Grade 5

Type III
Class B
Grade 3

Type III
Class B
Grade 3

Tower & Flat Face Grounding Clamps
Tower & Flat Face Grounding Clamps

Catalog Number

G33631

G33632

C6000085

C6001783

ELECTRICAL RATINGS

Continuous Current (AMPS)

400

400

400

400

Fault Current - 15 Cycles (AMPS)

27,000

27,000

43,000

43,000

Fault Current - 30 Cycles (AMPS)

20,000

20,000

30,000

30,000

MECHANICAL RATINGS

Recommended Torque (in.-lb.)

250

250

250

300

Main Line Range - Max.

1-1/2” Angles
1-1/2” Flat

1-1/2” Angles
1-1/2” Flat

4" Structural
Angles

3/4" x 5" Angles or Flats
5/8" Rod

Main Line Range - Min.

1/8”

1/8”

2" Structural
Angles

1/8”

Jumper Range - Max.

2/0 Grd. Cable
w/Plain Plug

2/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Threaded Stud

Jumper Range - Min.

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Threaded Stud

Weight Each

2-1/2 lb./l.l kg.

2-1/2 lb./1.1 kg.

3-3/4 lb./1.1 kg.

5 lb./2.25 kg.

ASTM Designation

Type I
Class B
Grade 3

Type III
Class B
Grade 3

Type III
Class B
Grade 5

Type III
Class B
Grade 5

All-Angle Grounding Clamps
All-Angle Grounding Clamps

For installation ease, jaws pivot 75° left or right.

Catalog Number

G42291SJ

*HG42296SJ

C6001732

ELECTRICAL RATINGS

Continuous Current (AMPS)

400

400

400

Fault Current - 15 Cycles (AMPS)

43,000

43,000

43,000

Fault Current - 30 Cycles (AMPS)

30,000

30,000

30,000

MECHANICAL RATINGS

Recommended Torque (in.-lb.)

250

250

250

Main Line Range - Max.

954 kcmil ACSR
(1.196")

954 kcmil ACSR
(1.196")

2-1/2 IPS
(2.88")

Main Line Range - Min.

#2 Cu. (.258")

#2 Cu. (.258")

#2 Cu. (.258")

Jumper Range - Max.

4/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Threaded Stud

Jumper Range - Min.

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Threaded Stud

Weight Each

2 lb./0.9 kg.

4-1/4 lb./2.0 kg.

3-1/4 lb./1.5 kg.

ASTM Designation

Type I
Class B
Grade 5

Type II
Class B
Grade 5

Type I
Class B
Grade 5

*Mounted Clamps supplied with 1-1/4” x 6' Epoxiglas® Pole.

Catalog Number

G422810SJ

*HG422816SJ

T6001693

ELECTRICAL RATINGS

Continuous Current (AMPS)

400

400

400

Fault Current - 15 Cycles (AMPS)

43,000

43,000

43,000

Fault Current - 30 Cycles (AMPS)

30,000

30,000

30,000

MECHANICAL RATINGS

Recommended Torque (in.-lb.)

250

250

250

Main Line Range - Max.

2-1/2 IPS
(2.88")

2-1/2 IPS
(2.88")

2-1/2 IPS
(2.88")

Main Line Range - Min.

#2 Cu. (.258")

#2 Cu. (.258")

1-1/4 IPS (1.66")

Jumper Range - Max.

4/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Plain Plug

4/0 Grd. Cable
w/Threaded Stud

Jumper Range - Min.

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Plain Plug

#2 Grd. Cable
w/Threaded Stud

Weight Each

3-1/4 lb./1.5 kg.

5-1/4 lb./2.4 kg.

3-1/4 lb./1.5 kg.

ASTM Designation

Type I
Class B
Grade 5

Type II
Class B
Grade 5

Type I
Class B
Grade 5

*Mounted Clamps supphed wIth 1-1/4” x 6' Epoxiglas® Pole.

Apparatus Grounding Clamps
Apparatus Grounding Clamps

Chance grounding clamps, ferrules and cable meet ASTM F 855.
Apparatus Grounding Clamps
Ball-and-socket design for multiple uses
For restricted-space applications and as a truck-grounding system, this compact design delivers a high-current rating usually associated with only large clamps.
It applies to a wide range of switching equipment, including:
Industrial metalclad gear,
Substations - indoors and out,
Distribution - overhead and underground.
For trucks, a *ball stud permanently mounts on each body.
Two clamp styles and three ball-stud lengths adapt to many applications. Clamp bodies, eyescrews and "'ball-studs are bronze alloy. Tin-plated ball-studs have nominal 1"-diameter ball and stud to fit NEMA terminal pads. Lockwasher and nut are silicone bronze.
ASTM Designation of Type I, Class A, Grade 5 for any of these clamps is met if associated grounding-cable sets are fitted with 5/8" copper ferrules as on page 3019.
Fault Current Ratings:
43,000 Amps - 15 cycles
30,000 Amps - 30 cycles
Recommended Installing Torques:
Eyescrew 250 inch-pounds
*Ball Stud 300 inch-pounds

Long stud shank accepts most types of grounding clamps
Socket clamps provide multi-angle attachment of grounds

Grounding Stud Cover
Grounding Stud Cover

Grounding Stud Cover - fits onto 1" ball-studs of Apparatus Grounding Clamps above
This flexible cover fits only C6002102 or T6002364 ball-studs. Of the same material as Chance line hose, nonconductive cover may help prevent flashover on ball studs installed in enclosed switchgear, switchyards or substations.
An environmental protector to reduce corrosion and contami­nation on the ball-stud when energized cover is not intended for personnel protection and should not be considered as insulative cover-up equipment. Resilient ozone/corona­resistant thermo-plastic elastomer does not absorb water. Special formulation resists aging/checking and retains high­visibility orange color.
Snap-fit keeps cover in place. The 5/8"-I.D. loop at top permits hot-line tools to "pop" it on and off. Chance silicone lubricant C4002320 or C4170287 may ease installation and removal.

Catalog No.

Description

Weight

C4060416

Grounding Stud Cover

1 oz. (28 g.)

Three-Way Grounding Clamps for *Ball-Stud Conductors, Busbars
Three Way Grounding Clamp

Three-Way Grounding Clamp for *ball-stud, conductors, busbars
Versatile clamp serves such temporary-grounding uses as a truck-grounding system; on industrial metalclad switchgear; substation buswork - indoors and out; overhead, under­ground and substation switches; and three-phase ground sets with special, multi-angle *ball studs. Compact design delivers a high-current rating usually associated with only large clamps.
For grounding trucks or other equipment, *ball stud permanently mounts on each body with furnished lockwasher, flat washer and nut. Removable stud has recessed-hex end fitting for through-mounting versatility.
Clamp body is aluminum. Acme-threaded eyes crew and *ball­stud are bronze alloy. Tin-plated ball-stud has 20mm (0.788") diameter ball, 7/8"-hex fitting and l-1/2"-long 1/2"-13 threads to fit NEMA terminal pads.
ASTM Designation of Type I, Class A, Grade 5 is met if associated grounding-cable sets are fitted with copper ferrules.
Fault current ratings:
43,000 amps - 15 cycles
30,000 amps - 30 cycles
Recommended Installing Torques:
Eyescrew 250 inch-pounds
*Ball Stud 300 inch-pounds
By supporting other clamps in three-phase sets, ball studs reduce installation labor. This can contribute to safety and minimize the number of clamp connections per conductor in an overhead grounding scheme.
*Ball -studs mount without furnished washers in holes of lower clamp boss. The tapped holes ship with plastic plugs.
Clamp terminal is tapped for 5/8"-11 UNC threaded-stud ferrules on grounding cable from #2 through 4/0.
Clamp Main Line Range:

  • Bare Conductors from #8 Sol. Cu. through 636 ACSR
  • Flat Busbar through 1/4" x 1-1/4" maximum
  • Ball-Stud 20mm (0.788") only

Catalog No.

Description

Weight, each

C6002316

Three-Way Clamp Body only

1-1/2 lb./0.68 kg.

C6002317

*20 mm (0.788") diameter Ball Stud with fiat washer, lockwasher and nut

3/8 lb./0.2 kg.

* Ball-stud does not interchange with system shown on tables above this one.

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