Morris 91522 Irreversible Grounding Connector, 500 MCM - 250 MCM to 3/4" Rod

Product Overview

The Morris 91522 is a permanent, irreversible grounding connector designed to bond a 500 MCM–250 MCM grounding electrode conductor to a 3/4" ground rod or rebar.

Constructed from pure electrolytic copper, the 91522 is suitable for Copperweld or copper-clad cable and is acceptable for direct burial in earth or concrete.

Key Features

• Irreversible (permanent) connection for long-term grounding continuity
• Wire range: 500 MCM down to 250 MCM grounding electrode conductors
• Fits 3/4" ground rod or rebar
• Made of pure electrolytic copper — matches or exceeds conductor current-carrying capacity
• Acceptable for direct burial in earth or concrete
• Suitable for Copperweld and copper-clad cable

What this connector does

The Morris 91522 provides a permanent, irreversible mechanical bond between a large grounding electrode conductor and a rod or rebar electrode. It is intended to create a reliable electrical connection for counterpoise, grid, and grounding-electrode systems.

• Bonds a single conductor in the 500 MCM–250 MCM range to a 3/4" rod or rebar
• Used where a durable, non-removable connection is required

Materials and environmental suitability

The connector is made of pure electrolytic copper. The material selection matches or exceeds the current-carrying capacity of the specified conductors and is compatible with Copperweld or copper-clad cable.

• Acceptable for direct burial in earth and for embedding in concrete
• Electrolytic copper construction supports long-term conductivity

Basic installation overview

Installation creates an irreversible connection. Position the connector over the 3/4" rod with the conductor properly seated, then make the permanent connection following the manufacturer's installation instructions.

• Ensure conductor size is within the 500 MCM–250 MCM range before making the connection
• Confirm rod/rebar diameter is 3/4"
• Follow Morris's installation procedure to form the irreversible bond

Key specifications

Use the specifications below to confirm compatibility with your grounding components.

• Catalog number: 91522
• Type: Irreversible grounding connector (permanent)
• Wire range: 500 MCM – 250 MCM
• Rod/Rebar diameter: 3/4"
• Material: Pure electrolytic copper
• Burial: Acceptable for direct burial in earth or concrete
• Compatibility: Suitable for Copperweld or copper-clad cable

Before You Order

Confirm the model number and ensure the conductor size and rod/rebar diameter match your application before ordering.

• Verify conductor is within the 500 MCM–250 MCM range
• Verify electrode rod or rebar diameter is 3/4"
• Follow project or code requirements and consult Morris installation instructions for irreversible connections

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Morris 91522 Irreversible Grounding Connector, 500 MCM - 250 MCM to 3/4" Rod. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.