Grounding Pipe Clamps | McMaster-Carr

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Grounding

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Warning: Products have one, but not necessarily all, of the selected characteristics.

Grounding

Bonding

	For Wire Gauge For Wire Gauge

16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1/0
2/0
3/0
4/0
250 MCM
300 MCM
350 MCM
400 MCM
500 MCM

	Clamp Type Clamp Type


C	Dual Nut

Magnetic	Pipe

Plier	Single Nut

Spring	U Bolt

	For Pipe Size For Pipe Size

	Material Material

	For Number of Wires For Number of Wires

	Electrical Connection Type Electrical Connection Type

Bolt

Grounding Clamp

Alligator Clip

	System of Measurement System of Measurement

Inch

	For Rod Diameter For Rod Diameter

	For Pipe OD For Pipe OD

	Specifications Met Specifications Met

UL Listed

UL 467

UL 96

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Length Length

12"

14"

24"

	Component Component

Bonding Plate

Copper-to-Aluminum
Connector

	Finish Finish

Galvanized

Tin Plated

	Cable Length Cable Length

	Jaw Opening Jaw Opening

	Connection Material Connection Material

	Current Current

	For Minimum Wire OD For Minimum Wire OD

1/8"

3/8"

7/16"

	Cable Connection Type Cable Connection Type

Bolt and Nut

Screw

Male and Female Cam

	Cable Insulation Color Cable Insulation Color

	Orange
	Clear

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75 Products

About Bonding and Grounding for Static Control

For 1 Wire

For 2 Wires

Attach grounding wire to pipes.

	For Pipe
For No. of Wires	Size	OD	For Wire Gauge	Material	Electrical Connection Type	Specifications Met		Each
1	1/2 to 1	1/2"-1 1/4"	16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2	Bronze	Bolt	UL Listed	0000000	000000
2	1 to 1 1/4	3/4"-1 11/16"	6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0, 250 MCM	Tin-Plated Bronze	Bolt	UL Listed	0000000	00000
2	1 1/2 to 2	1"-2 3/8"	6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0, 250 MCM	Tin-Plated Bronze	Bolt	UL Listed	0000000	00000
2	2 1/2 to 3	2 1/4"-3 1/2"	6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0, 250 MCM	Tin-Plated Bronze	Bolt	UL Listed	0000000	00000
2	3 1/2 to 4	3 1/4"-4 1/2"	6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0, 250 MCM	Tin-Plated Bronze	Bolt	UL Listed	0000000	00000
2	5 to 6	5 5/8"-6 5/8"	6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0, 250 MCM	Tin-Plated Bronze	Bolt	UL Listed	0000000	00000

Grounding Rod Clamps

Connect bare-copper ground wire to grounding rods.

Dual nut clamps give you more flexibility than single nut clamps.

U-bolt clamps are the most adjustable and work with rods ranging in size from 3/8" to 1".

Clamps with a floating pressure bar distribute pressure evenly over a large area, which creates more contact area for grounding.

Two-piece design clamps are easier to install onto bends and continuous loops than other single- and dual-nut clamps.

For clamps with lay-in wire, there’s no need to thread wire through them. Simply lay the wire into the clamp’s opening and fasten.

UL 467 clamps meet a standard for direct burial.

For technical drawings and 3-D models, click on a part number.

Single Nut with Floating Pressure Bar

Single Nut with Two-Piece Design

Dual Nut with Two-Piece Design and Lay-In Wire

Single Nut
For Rod Dia. (For Wire Gauge)	Material	Features	Specifications Met		Each
1/2" (10, 9, 8, 7, 6, 5, 4, 3, 2)	Copper Alloy	__	UL 467	0000000	00000
1/2" (8, 7, 6, 5, 4, 3, 2)	Copper Alloy	Floating Pressure Bar	__	0000000	00000
1/2" (6, 5, 4, 3, 2, 1, 1/0, 10, 8, 7, 9) 5/8" (6, 5, 4, 3, 2, 1, 1/0, 10, 8, 7, 9) 3/4" (2, 1, 1/0, 3, 4, 5, 6, 7, 8)	Bronze	__	UL 467	0000000	0000
1/2" (6, 4) 3/4" (6, 4)	Bronze	Two-Piece Design	__	0000000	00000
5/8" (8, 7, 6, 5, 4, 3, 2)	Copper Alloy	Floating Pressure Bar	__	0000000	00000
5/8" (8, 7, 6, 5, 4, 3, 2, 1, 1/0)	Copper Alloy	__	UL 467	0000000	0000
3/4" (8, 7, 6, 5, 4, 3, 2, 1, 1/0)	Copper Alloy	__	UL 467	0000000	0000
3/4" (8, 7, 6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0)	Copper Alloy	Floating Pressure Bar	__	0000000	000000
1" (8, 7, 6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0)	Copper Alloy	__	UL 467	0000000	00000
Dual Nut
1/4"-1" (10, 9, 8, 7, 6, 5, 4, 3, 2)	Bronze	Lay-In Wire, Two-Piece Design	__	0000000	00000
1/2" (6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0, 250 MCM, 300 MCM, 350 MCM) 5/8" (6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0, 250 MCM, 300 MCM, 350 MCM) 3/4" (2, 1, 1/0, 2/0, 3/0, 4/0, 250 MCM)	Bronze	__	UL 467	0000000	00000
U Bolt
3/8"-1" (6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0, 250 MCM, 300 MCM, 350 MCM, 400 MCM, 500 MCM)	Bronze	__	UL 467	0000000	00000

Grounding Plate Clamps

Eliminate the need to drive a new ground rod—these clamps connect grounding wire to an existing flat grounding surface, such as the lid of an electric meter box.

For Wire Gauge	For Max. Plate Thick.	Material	For No. of Wires	Electrical Connection Type	Specifications Met		Each
14, 13, 12, 11, 10, 9, 8, 7, 6	3/8"	Bronze	1	Bolt	UL Listed	0000000	000000

Grounding Clamps for Welding

Designed specifically for use with welding circuits. Clamps that are copper or have copper-plated components prevent weld spatter from sticking.

C-clamps tighten with a handle. Use these multipurpose tools for strong clamping in nearly any application. Heavy duty clamps have a strong frame that won’t spread when holding big workpieces, such as large diameter pipe and thick plate. No-twist clamps have jaws that move in unison to apply even pressure and prevent twisting while securing your workpiece. They’re also known as cantilever clamps. Clamps with an ABS plastic handle have a cushioned grip that’s comfortable to hold.

Plier clamps are good for light duty applications that require mobility, such as building a fence. Nonconductive clamps won’t transmit electricity, meaning you can touch them while the power is on without disrupting the circuit.

Spring clamps have an extended jaw that eases clamping. Both jaws carry current. Flat-jaw clamps grip flat surfaces especially well. They have a larger contact area with the workpiece than standard spring clamps, so electricity flows more easily, but their jaw openings aren’t as large.

Magnetic clamps stick to metal surfaces on your workpiece, even oddly-shaped and sized ones. Compared to traditional clamps, they require less manual effort and are less limited by the amount of space available on your workpiece. However, you can’t use them on aluminum or nonferrous material, and their hold is usually less powerful than traditional clamps. Clamps with an on/off switch let you engage and disengage the magnet for easy placement and removal of your workpiece. Multiple-angle clamps let you hold more than one workpiece at a time, at different angles.

Cable supports prevent cable strand breakage.

For technical drawings and 3-D models, click on a part number.

C-Clamps

C-Clamp, Heavy Duty C-Clamp (Bronze Connection)

No-Twist C-Clamp

No-Twist C-Clamp with ABS Plastic Handle

Standard
Current, A	For Wire Gauge	For No. of Wires	Max. Cable Outlet Dia.	Jaw Opening	Connection Material	Cable Connection Type	Features		Each
300	1/0, 2/0	__	0.56"	2"	Bronze	Male and Female Cam	Copper-Plated Steel Screw	0000000	000000
300	1/0, 2/0	__	0.56"	2"	Bronze	Screw	Copper-Plated Steel Screw	0000000	00000
600	3/0, 4/0	__	0.63"	2"	Bronze	Male and Female Cam	Copper-Plated Steel Screw	0000000	000000
600	3/0, 4/0	__	0.63"	2"	Bronze	Screw	Copper-Plated Steel Screw	0000000	000000
Heavy Duty
600	3/0, 4/0	1	0.66"	3 3/8"	Bronze	Male and Female Cam	Copper-Plated Steel Screw	0000000	000000
600	3/0, 4/0	1	0.66"	3 3/8"	Bronze	Screw	Copper-Plated Steel Screw	0000000	000000
No Twist
400	__	__	__	4 1/2"	Copper	Bolt and Nut	__	0000000	00000
400	__	__	__	4 1/2"	Copper	Bolt and Nut	ABS Plastic Handle	0000000	00000

Plier Clamps

Nonconductive Plier Clamp

Plier Clamp

Current, A	For Wire Gauge	Jaw Opening	Connection Material	Cable Connection Type	Stud Lg.	Features		Each
180	1/0	2"	Copper	Bolt and Nut	1/2"	Nonconductive, Cable Support	0000000	000000
200	1/0	1 1/2"	Steel	Bolt and Nut	3/4"	Cable Support	0000000	0000
300	1/0, 2/0	2"	Steel	Bolt and Nut	3/4"	Cable Support	0000000	00000
500	3/0, 4/0	2"	Steel	Bolt and Nut	3/4"	Braided Copper Shunt, Cable Support	0000000	00000

Spring Clamps

Spring Clamp

Flat Jaw Spring Clamp

Standard
Current, A	For Wire Gauge	Max. Cable Outlet Dia.	Jaw Opening	Connection Material	Cable Connection Type	Features		Each
200	6, 5, 4, 3, 2, 1, 1/0	0.51"	1"	Copper	Screw	Copper Hinge Pin, Cable Support	000000	000000
300	6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0	0.54"	1 1/2"	Copper	Screw	Copper Hinge Pin, Cable Support	000000	00000
500	6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0	0.58"	2"	Copper	Screw	Copper Hinge Pin, Cable Support	000000	00000
Flat Jaw
200	6, 5, 4, 3, 2, 1, 1/0	__	5/8"	Copper	Screw	Copper Hinge Pin	0000000	00000
300	6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0	__	1"	Copper	Screw	Copper Hinge Pin	0000000	00000
500	6, 5, 4, 3, 2, 1, 1/0, 2/0, 3/0, 4/0	__	1 1/4"	Copper	Screw	Copper Hinge Pin	0000000	00000

Magnetic Clamps

Magnetic Clamp

Standard
Current, A	Connection Material	Cable Connection Type	Dia.	Handle Lg.	Stud Lg.		Each
250	Brass	Bolt and Nut	3 1/2"	5 1/8"	2"	000000	000000
800	Copper	Bolt and Nut	3 1/2"	5 1/8"	2"	000000	00000

Magnetic Clamps with On/Off Switch

Magnetic Clamp with On/Off Switch

Multiple-Angle Magnetic Clamp with On/Off Switch

Standard
Current, A	Connection Material	Cable Connection Type	Ht.	Wd.	Stud Lg.		Each
200	Steel	Bolt and Nut	2 3/4"	1 13/16"	1 1/4"	0000000	000000
300	Steel	Bolt and Nut	2 3/4"	1 15/16"	1 1/4"	000000	00000
800	Steel	Bolt and Nut	5"	3"	1 1/4"	000000	000000
Multiple Angle
300	Steel	Bolt and Nut	3 3/4"	1 15/16"	__	0000000	000000

Grounding Straps

Straps fit around pipes and grounding rods. For best performance, match the strap material to your pipe material.

For technical drawings and 3-D models, click on a part number.

For Pipe OD	Lg.	For Wire Gauge	Material	For No. of Wires	Electrical Connection Type	Specifications Met		Each
3/8"-2"	7"	14, 13, 12, 11, 10, 9, 8, 7, 6	Copper	1	Bolt	UL Listed	0000000	000000
3/8"-2 3/4"	9"	14, 13, 12, 11, 10, 9, 8, 7, 6	Copper	1	Bolt	UL Listed	0000000	00000
3/8"-3 1/2"	12"	14, 13, 12, 11, 10, 9, 8, 7, 6	Copper	1	Bolt	UL Listed	0000000	00000
3/8"-4"	14"	14, 13, 12, 11, 10, 9, 8, 7, 6	Copper	1	Bolt	UL Listed	0000000	00000
3/8"-6 1/2"	24"	14, 13, 12, 11, 10, 9, 8, 7, 6	Copper	1	Bolt	UL Listed	0000000	00000
1/2"-1"	6"	12, 11, 10	Galvanized Steel	1	Bolt	UL Listed	0000000	0000
1/2"-1"	6"	12, 11, 10, 9, 8, 7, 6	Copper	1	Bolt	UL Listed	0000000	0000
1/2"-2 1/4"	9"	12, 11, 10	Galvanized Steel	1	Bolt	UL Listed	0000000	0000
1/2"-2 1/4"	9"	12, 11, 10, 9, 8, 7, 6	Copper	1	Bolt	UL Listed	0000000	0000
1/2"-3"	12"	12, 11, 10	Galvanized Steel	1	Bolt	UL Listed	0000000	0000
1/2"-3"	12"	12, 11, 10, 9, 8, 7, 6	Copper	1	Bolt	UL Listed	0000000	0000

Bonding and Grounding Clamps with Cable

Create a grounding path to prevent static charge buildup.

Also Available: Additional cable lengths for noninsulated and insulated cables with two connections. Please select 6955K889 and specify connection types and length.

Cable With 2 Connections

Alligator Clip

C-Clamp

Plier Clamp

Steel Pipe Clamp

Bronze Pipe Clamp

		Galvanized Steel Cable
Electrical Connection Type	Connection Material	Lg., ft.	OD	Insulation Color		Each
Insulated Cable
Pipe Clamp (2 1/2" Jaw Opening) C-Clamp (1" Jaw Opening)	Cadmium-Plated Steel Galvanized Steel	3	0.13"	Clear	000000	000000
Insulated Retracting Cable
C-Clamp (1" Jaw Opening) Alligator Clip (3/4" Jaw Opening)	Galvanized Steel Copper	5	0.13"	Orange	00000000	00000
Plier Clamp (1 1/8" Jaw Opening) Pipe Clamp (1 5/8" Jaw Opening)	Aluminum Bronze	10	0.13"	Orange	0000000	00000
Plier Clamp (1 1/8" Jaw Opening) Pipe Clamp (1 5/8" Jaw Opening)	Aluminum Bronze	20	0.13"	Orange	0000000	00000

Lightning Protection

Protect electrical systems from lightning strikes on structures up to seventy-five feet tall. When replacing or adding components to an existing system, choose components that match your existing material. For a new system, choose components of the same material.

Rod bases can be mounted horizontally or vertically.

Wire clamps fold around the wire.

Bonding plates electrically bond your system to a metallic object.

Parallel connectors accept lightning wire and rods.

Joint compounds are recommended for use in corrosive environments. Apply at connection points.

For technical drawings and 3-D models, click on a part number.

Lightning Wires

					Aluminum		Copper
Wire Gauge	OD	Insulation	Mounting Hardware Included	Specifications Met		Per Ft.		Per Ft.
16	3/8"	Noninsulated	No	UL Listed, UL 96	000000	00	0000000	00000
14	7/16"	Noninsulated	No	UL Listed, UL 96	0000000	00000	000000	00

Rods

				Aluminum		Copper
Lg.	Thread Size	Mounting Hardware Included	Specifications Met		Each		Each
12"	1/2"-13	No	UL Listed, UL 96	0000000	00000	0000000	000000

Rod Bases

				Aluminum		Copper
For Thread Size	Mounting Orientation	Mounting Hardware Included	Specifications Met		Each		Each
1/2"-13	Horizontal, Vertical	No	UL Listed, UL 96	0000000	000000	0000000	000000

Wire Clamps

			Aluminum		Copper
For Wire OD	Mounting Hardware Included	Specifications Met		Each		Each
3/8"-7/16"	No	UL Listed, UL 96	000000	00	0000000	00000
7/16"-1/2"	No	UL Listed, UL 96	0000000	00000	000000	00

Bonding Plates

			Aluminum		Copper
For Wire OD	Mounting Hardware Included	Specifications Met		Each		Each
1/8"-9/16"	No	UL Listed, UL 96	0000000	000000	0000000	000000

Copper-to-Aluminum Connectors

For Wire OD	Material	Mounting Hardware Included	Specifications Met		Each
1/8"-1/2"	Brass/Aluminum	No	UL Listed, UL 96	0000000	000000

Parallel Connectors

			Aluminum		Copper
For Wire OD	Mounting Hardware Included	Specifications Met		Each		Each
1/8"-5/8"	No	UL Listed, UL 96	0000000	00000	0000000	000000

Wire Guides

			Aluminum		Copper
For Wire OD	Mounting Hardware Included	Specifications Met		Each		Each
1/8"-5/8"	No	UL Listed, UL 96	0000000	00000	0000000	00000

Joint Compounds

	For Aluminum		For Copper
Container Size, fl. oz.		Each		Each
1/2	000000	00000	000000	00000