Morris 91547 Irreversible Grounding Connector, 500 MCM Run / 250 MCM Tap

Product Overview

The Morris 91547 is an irreversible (permanent) grounding connector that bonds a 500 MCM–250 MCM run conductor to a 250 MCM–3/0 stranded tap conductor. It also accepts a 3/4"–5/8" ground rod or #5 (5/8")–#6 (3/4") rebar.

Constructed of pure electrolytic copper, the connector matches or exceeds the current-carrying capacity of the conductors and is acceptable for direct burial in earth or concrete.

Key Features

• Irreversible (permanent) mechanical connection — no set screws to loosen
• Pure electrolytic copper body — matches or exceeds conductor capacity
• Run conductor range: 500 MCM – 250 MCM
• Tap conductor range: 250 MCM – 3/0 stranded
• Accepts 3/4"–5/8" ground rod or #5–#6 rebar for rod/rebar bonding
• Approved for direct burial in earth and concrete (per manufacturer guidance)

What this connector does

The Morris 91547 provides a permanent, irreversible bond between a larger run conductor and a smaller tap, and can also connect a conductor to a ground rod or rebar. It is intended for use in grounding-electrode and bonding systems where a lasting metallic bond is required.

• Bonds run to tap conductors (500 MCM–250 MCM run to 250 MCM–3/0 Str. tap)
• Permits direct conductor-to-rod or conductor-to-rebar connections when electrode sizes match the stated ranges

Conductor, rod, and rebar compatibility

Use this exact SKU when your run and tap conductors and electrodes fall within the listed ranges. Do not assume compatibility outside these ranges.

• Run (main) conductor range: 500 MCM – 250 MCM
• Tap conductor range: 250 MCM – 3/0 stranded
• Ground rod diameters accepted: 3/4"–5/8"
• Rebar sizes accepted: #5 (5/8") – #6 (3/4")

Materials and environmental suitability

The connector is made from pure electrolytic copper. Per the manufacturer's specification, the material selection is intended to match or exceed the conductor's current-carrying capacity and is acceptable for direct burial in earth or concrete.

• Material: pure electrolytic copper
• Suitable for direct burial in earth and concrete (manufacturer guidance)

Installation and connection type

The 91547 creates a permanent, irreversible mechanical connection. Installers insert the run and tap conductors (and a rod or rebar where used) and make the irreversible connection following Morris's installation instructions.

• Connection type: irreversible (permanent)
• Follow Morris installation instructions for making the permanent connection

Before You Order

Confirm the model number and conductor/electrode sizes required for your application before ordering.

• Verify run and tap conductor sizes fall within the listed ranges (500–250 MCM run, 250 MCM–3/0 tap).
• Confirm ground rod or rebar diameter/size matches the connector’s accepted range if using for electrode bonding.
• Follow Morris's installation instructions for making the irreversible connection; the connector is permanent once applied.

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Morris 91547 Irreversible Grounding Connector, 500 MCM Run / 250 MCM Tap. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.