Morris 90561 Aluminum Feed-Thru Ground Pipe Clamp, 2-1/2"-4" Pipe

Product Overview

The Morris 90561 is a feed‑thru style aluminum ground pipe clamp designed to bond a grounding conductor to pipes or conduit with a nominal diameter range of 2-1/2" to 4".

The clamp is cast from 6061‑T6 tin‑plated aluminum alloy, is dual rated for copper or aluminum conductors, and includes a tin‑plated set screw and machined‑steel mounting hardware.

Key Features

• Feed‑thru design allows the grounding conductor to pass through the clamp while providing a mechanical and electrical connection to the pipe.
• Cast 6061‑T6 tin‑plated aluminum alloy body.
• Dual rated for copper and aluminum conductors.
• Tin‑plated set screw (5/8"‑18) and tin‑plated machined‑steel mounting hardware.
• Supports nominal pipe sizes 2-1/2" to 4" and conductor sizes 250 MCM down to 6 AWG.

What this clamp does

Direct answer: The Morris 90561 provides a mechanical and electrical bond between a grounding electrode conductor and a metal water pipe, ground rod, galvanized pipe, or steel conduit while allowing the conductor to pass through the clamp (feed‑thru style).

The feed‑thru design secures the conductor and attaches the clamp body to the pipe.

• Feed‑thru style for continuous conductor routing
• Mechanical and electrical bonding to the pipe surface

Where to use it

Direct answer: Use this clamp when bonding grounding electrode conductors to pipes or conduit with nominal diameters between 2-1/2" and 4".

The product description identifies water pipe, ground rod, galvanized pipe, and steel conduit as intended connection types.

• Pipe/conduit nominal diameter: 2-1/2"–4"
• Intended for bonding to water pipe, ground rod, galvanized pipe, or steel conduit

Conductor and pipe compatibility

Direct answer: This clamp is dual rated for copper and aluminum conductors and lists a wire range of 250 MCM to 6 AWG.

Confirm conductor insulation, routing, and local code requirements before installation.

• Conductor compatibility: Copper and aluminum (dual rated)
• Wire range: 250 MCM–6 AWG
• Pipe range: 2-1/2"–4" nominal diameter

Materials and corrosion resistance

Direct answer: The clamp body is described as cast from 6061‑T6 tin‑plated aluminum alloy; the set screw and mounting hardware are described as tin‑plated.

Tin plating and the listed materials are intended to provide corrosion resistance where dissimilar metals are joined, as indicated in the product description.

• Body: 6061‑T6 tin‑plated aluminum alloy
• Set screw: tin‑plated (5/8"‑18)
• Mounting hardware: tin‑plated machined steel

Basic installation overview

Direct answer: The product description shows the clamp is installed by placing it around the pipe, routing the conductor through the feed‑thru, and tightening the set screw and mounting hardware.

Follow applicable local electrical codes and project requirements during installation.

• Place clamp on pipe and feed conductor through the run
• Tighten the set screw and mounting hardware to secure pipe and conductor

Before You Order

Confirm the model number, required quantity, pipe diameter, and conductor sizes before ordering.

• Verify pipe nominal diameter is within 2-1/2"–4".
• Confirm conductor size is within 250 MCM–6 AWG and that dual‑rated Cu/Al compatibility matches your conductor material.
• If unsure about code compliance or installation specifics, consult a licensed electrician.

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Morris 90561 Aluminum Feed-Thru Ground Pipe Clamp, 2-1/2"-4" Pipe. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.