Morris 91660 Serrated-Collar Ground Pipe Clamp, 1/2" - 1" Pipe

Product Overview

The Morris 91660 is a copper-alloy ground pipe clamp with a serrated collar designed to bond #2 through #10 AWG conductors to 1/2"–1" water pipe, copper tubing, or a ground rod.

The serrated collar accepts Morris serrated adaptors (91603–91606) for grounding armored cable or conduit. Set screws are zinc-plated steel for improved corrosion resistance.

Key Features

• For bonding #2–#10 AWG conductors to 1/2"–1" pipe, copper tubing, or ground rod
• Serrated collar accepts Morris adaptors 91603–91606 for conduit or armored-cable grounding
• Cast from high-strength, high-conductivity copper alloy
• Zinc-plated steel set screws for corrosion resistance

What this clamp does

The Morris 91660 provides a secure electrical bond between grounding conductors and metallic piping or a ground rod. It is intended for use where reliable mechanical and electrical contact to a water pipe, copper tubing, or ground rod is required.

• Bonds conductors sized #2 through #10 AWG to pipe or rod
• Serrated collar ensures positive contact and accepts specific adaptors for alternate conductor types

Compatibility and adaptors

Use this clamp with 1/2" to 1" nominal pipe or copper tubing. The serrated collar is compatible with Morris serrated adaptors catalog numbers 91603 through 91606 to connect armored cable or conduit when needed.

• Pipe range: 1/2"–1"
• Wire range: #2–#10 AWG
• Pairs with Morris serrated adaptors 91603–91606 (adaptors sold separately)

Materials and corrosion resistance

The clamp body is cast from a high-strength, high-conductivity copper alloy to provide low-resistance grounding paths. Set screws are zinc-plated steel to resist corrosion in typical electrical grounding installations.

• Clamp material: copper alloy (cast)
• Set screw finish: zinc-plated steel

Installation overview

Installation is straightforward: place the clamp around the pipe, insert the conductor or a serrated adaptor into the collar, and tighten the set screw to secure the connection. Tightening should produce firm mechanical and electrical contact without damaging the conductor.

• Place clamp around pipe or rod within the specified pipe range
• Insert conductor (#2–#10 AWG) or a compatible serrated adaptor
• Tighten set screw(s) to achieve secure connection

Before You Order

Confirm the model number and that the pipe diameter and conductor size match the clamp's specified ranges before ordering.

• Verify pipe or tubing is within 1/2"–1" nominal diameter
• Confirm conductor size is between #2 and #10 AWG
• If grounding armored cable or conduit, order the appropriate serrated adaptor (91603–91606) separately

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Morris 91660 Serrated-Collar Ground Pipe Clamp, 1/2" - 1" Pipe. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.