Morris 91709 Rotatable Rigid-Conduit-Hub Ground Clamp, 2-1/2" - 4" Pipe, 1" Hub

Product Overview

The Morris 91709 is a copper ground clamp with a 1" rotatable rigid‑conduit hub for bonding conduit to water pipe, copper tubing, or a ground rod. The serrated conduit adaptor swings 360° to simplify alignment.

Cast of high‑strength, high‑conductivity copper alloy with zinc‑plated steel set screws, the 91709 terminates conductors from 3/0 AWG down to 10 AWG and clamps to pipe sized 2-1/2" through 4".

Key Features

• 1" rotatable rigid‑conduit hub with serrated adaptor that swings 360° for alignment
• Compatible with 2-1/2"–4" pipe, copper tubing, or ground rods
• Accepts conductors in the 3/0 AWG – 10 AWG range
• Cast from high‑strength, high‑conductivity copper alloy
• Zinc‑plated steel set screws for corrosion resistance

What this clamp does

The Morris 91709 provides a secure electrical bond between 1" rigid conduit and a metallic grounding point such as a water pipe, copper tubing, or ground rod. It also provides a termination point for a grounding conductor between 3/0 AWG and 10 AWG.

Pipe and conductor compatibility

Use this clamp where the structure being bonded is a pipe or tubing with an outside diameter within the specified range, and where the conductor falls within the listed AWG sizes.

• Pipe range: 2-1/2" – 4"
• Conduit hub size: 1" (rotatable rigid‑conduit hub)
• Wire/conductor range: 3/0 AWG – 10 AWG

Basic installation steps

Install by threading the 1" rigid conduit into the rotatable hub, rotating the hub to the required orientation (the serrated adaptor provides 360° swing for alignment), positioning the clamp on the pipe or ground rod, inserting the grounding conductor, and tightening the set screws to secure the clamp and conductor.

Materials and corrosion resistance

The body is cast from a high‑strength, high‑conductivity copper alloy to maintain electrical continuity. Set screws are zinc‑plated steel to provide enhanced resistance to corrosion compared with plain steel hardware.

Before You Order

Confirm the model number and the pipe diameter and conductor size required for your application before ordering.

• Verify the pipe/tubing outside diameter falls within 2-1/2"–4"
• Confirm the grounding conductor is within the 3/0 AWG–10 AWG range
• Confirm you require a 1" rigid conduit hub and a rotatable, 360°‑alignment adaptor

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Morris 91709 Rotatable Rigid-Conduit-Hub Ground Clamp, 2-1/2" - 4" Pipe, 1" Hub. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.