Morris 91771 U-Bolt Ground Clamp, 3-Conductor, 1-1/2" Pipe, 250 MCM - #4 AWG

Product Overview

The Morris 91771 is a UL467-listed copper U-bolt ground clamp that connects three ground conductors (250 MCM down to #4 AWG) to a 1-1/2" pipe, copper tubing, ground rod, rebar, or fencing.

The clamp body is cast from a copper alloy and uses stainless steel bolts, nuts, and lock washers. It is listed under UL467 for direct burial in soil or concrete.

Key Features

• Connects three conductors parallel or at 90° to a 1-1/2" pipe or similar round electrode
• Wire range: 250 MCM down to #4 AWG
• Body cast from copper alloy
• Stainless steel bolts, nuts, and lock washers
• UL467 listed for direct burial in soil or concrete

What this clamp does

The Morris 91771 U-bolt ground clamp provides a mechanical and electrical connection for up to three grounding conductors to a cylindrical electrode such as a 1-1/2" water pipe, copper tubing, ground rod, rebar, or fencing.

Wire and electrode compatibility

This SKU is specified for three conductors in the range 250 MCM down to #4 AWG and is sized for a 1-1/2" pipe or similar round electrode. Conductors can be placed parallel or oriented at 90 degrees to the pipe as seated in the clamp.

• Conductors supported: 250 MCM – #4 AWG
• Electrode/pipe size: 1-1/2"

Materials and hardware

The clamp body is cast from a copper alloy. Fastening hardware—bolts, nuts, and lock washers—is stainless steel, per the product information.

Installation overview

Install by placing the U-bolt around the pipe or electrode, seating the conductors in the clamp saddle, and tightening the nuts to secure the conductors. The product listing indicates UL467 direct-burial suitability.

Before You Order

Verify the model number and that conductor sizes and the electrode (1-1/2" pipe or similar) match your requirements.

• Rated for conductors 250 MCM through #4 AWG.
• Sized for 1-1/2" round pipe or similar electrodes.
• UL467 direct-burial listing; follow applicable electrical codes for installation.

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Morris 91771 U-Bolt Ground Clamp, 3-Conductor, 1-1/2" Pipe, 250 MCM - #4 AWG. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.