Morris 91556 Copper Ground Clamp, 1/2"-1" Pipe, 3/4" Conduit Hub & Strap

Product Overview

The Morris 91556 is a copper ground clamp that combines a 3/4" rigid-conduit hub with an 8" copper extension strap for bonding grounding conductors to metallic grounding electrodes such as water pipe, ground rod, or copper-weld tubing.

The hub rotates 360° for alignment, is cast from a high-conductivity copper alloy, and uses zinc-plated steel set screws. It accepts conductors from #2 to #10 AWG and fits 1/2" to 1" water pipe.

Key Features

• 3/4" rigid-conduit hub with 360° rotation for alignment
• 8" copper extension strap
• Fits 1/2"–1" water pipe, ground rod, or copper-weld tubing
• Accepts #2–#10 AWG conductors
• Cast copper alloy construction with zinc-plated steel set screws

What this clamp does

Direct answer: The Morris 91556 provides a mechanical and electrical connection between a grounding conductor routed in 3/4" rigid conduit and a metallic grounding electrode such as water pipe, a ground rod, or copper-weld tubing.

Typical use: It is used where a grounding conductor in rigid conduit must be bonded to a pipe or other electrode.

• Provides a bonding point between conduit-mounted grounding conductor and pipe or electrode
• Conduit hub rotates to assist alignment

Pipe, conductor and conduit compatibility

Direct answer: The clamp is specified to fit 1/2" to 1" water pipe and accepts conductors from #2 through #10 AWG; the conduit hub is sized for 3/4" rigid conduit.

• Water pipe range: 1/2"–1"
• Conduit hub size: 3/4" rigid conduit
• Wire range accepted: #2 to #10 AWG

Installation overview

Direct answer: The product description indicates the conduit is intended to thread into the 3/4" hub, the hub may be rotated for alignment, and the strap is positioned against the pipe or electrode before the set screws are tightened.

Note: This is a product-level overview. Follow applicable electrical codes and manufacturer or installer instructions for safe and compliant installation.

• Thread conduit into the hub and adjust hub orientation as needed
• Position the 8" strap against the pipe or electrode and secure with the clamp
• Insert and secure the conductor within the clamp per installer procedures and code requirements

Materials

Direct answer: The body and strap are cast of a copper alloy; the set screws are zinc-plated steel.

Implication: Copper alloy parts provide electrical conductivity; zinc-plated steel screws are specified for fastening.

• Body and strap: copper alloy
• Set screws: zinc-plated steel

Before You Order

Verify that the listed pipe range, conductor size, and 3/4" rigid-conduit hub match your installation and applicable electrical codes.

• Confirm compatibility with your pipe diameter (1/2"–1") and conductor size (#2–#10 AWG)

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Morris 91556 Copper Ground Clamp, 1/2"-1" Pipe, 3/4" Conduit Hub & Strap. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.