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Burndy UCG28RS Aluminum Alloy Parallel Groove Clamp Connector
The Burndy UCG28RS is a multiple-purpose parallel groove clamp engineered from high strength, high conductivity aluminum alloy for reliable mechanical bolted connections in utility overhead and underground distribution systems. This versatile connector accommodates a wide conductor range, including 1/0-4/0 AWG stranded copper/aluminum or ACSR conductors on Side A and 6-4/0 AWG stranded copper/aluminum conductors on Side B, making it suitable for a broad range of tap and splice applications on distribution lines. Hardware is designed for one- or two-wrench installation and is rated for an installation torque of 250 in-lbs, helping installers achieve a consistent, secure connection in the field.
Key Features
- Conductor Range: Accommodates 1/0-4/0 AWG stranded copper/aluminum or ACSR conductors on Side A and 6-4/0 AWG stranded copper/aluminum conductors on Side B.
- Durable Construction: Made from high strength, high conductivity aluminum alloy for long service life and dependable electrical conductivity.
- Bolted Connection: Parallel groove clamp hardware allows for one- or two-wrench installation, simplifying assembly in the field.
- Installation Torque: Rated for 250 in-lbs installation torque to help ensure a secure, consistent connection.
- Multi-Purpose Design: Engineered to join dissimilar conductor types and sizes within a single fitting, reducing the number of connector SKUs required on a job.
- Bolt Size: 1/2-Inch hardware for compatibility with standard installation tooling.
Technical Specifications
- Conductor Range: 4/0-AWG
- Product Type: Mechanical
- Side A Conductor Range: 1/0-4/0 AWG Stranded Copper/Aluminum or ACSR
- Side B Conductor Range: 6-4/0 AWG Stranded Copper/Aluminum
- Bolt Size: 1/2-Inch
- Installation Torque: 250 in-lbs
- Material: High Strength, High Conductivity Aluminum Alloy
Typical Applications
- Utility Overhead and Underground Distribution Systems
- Mechanical Bolted Tap Connections
- Parallel Groove Splicing of Stranded Copper/Aluminum and ACSR Conductors
- Grounding and Bonding of Distribution Conductors
- Power Line Construction, Maintenance, and Repair
Why Burndy?
Burndy is a trusted name in utility-grade electrical connectors, and the UCG28RS parallel groove clamp reflects that standard with its high strength, high conductivity aluminum alloy construction and a precise 250 in-lbs installation torque specification. Built to handle a broad conductor range across both stranded copper/aluminum and ACSR conductor types, this clamp gives utility and line crews the versatility and dependable, code-conscious performance needed for demanding overhead and underground distribution work.
Manufacturer Resources
Spec Sheet
Product Specs
- list_batch:
- BURNDY-20260915
- Wire Size:
- 4/0-AWG
- Product Type:
- Connector
- Product Material:
- Aluminum
- Department:
- Electrical
- Product Group:
- Wire Connectors & Terminals
- Product Subgroup:
- Wire Connectors
Burndy UCG28RS – Frequently Asked Questions
1) What conductor sizes will the Burndy UCG28RS parallel groove clamp take on each side?
The UCG28RS takes 1/0-4/0 AWG stranded copper/aluminum or ACSR on Side A, and 6-4/0 AWG stranded copper/aluminum on Side B. That split is what lets you run a smaller tap off a larger main in one fitting, so you don't need a separate connector for each combination. Note Side A will not take anything below 1/0, so a small tap has to go in the B groove.
2) What torque do I tighten a Burndy UCG28RS clamp to?
250 in-lbs installation torque, on 1/2 inch bolt hardware. The hardware is set up for one- or two-wrench installation, so a lineman can make the connection off a stick or in a bucket without a special tool. Hit the 250 in-lbs with a torque wrench rather than guessing by feel; the aluminum alloy body relies on that clamping load for the electrical contact.
3) Can I use the Burndy UCG28RS to connect aluminum to copper conductors?
Yes. The UCG28RS is built for joining dissimilar conductor types and sizes in one fitting, and both grooves are rated for stranded copper or aluminum. Side A also accepts ACSR. The body is a high strength, high conductivity aluminum alloy, which is the usual choice for utility copper-to-aluminum mechanical connections.
4) Will the UCG28RS work on ACSR overhead line?
On Side A, yes. That groove is rated for 1/0-4/0 AWG stranded copper/aluminum or ACSR. Side B is rated for stranded copper/aluminum only, at 6-4/0 AWG, so put the ACSR conductor in the A groove.
5) Is a parallel groove clamp the right choice, or should I be using a compression connector?
A parallel groove clamp like the UCG28RS is a bolted mechanical connection: you set both conductors in the grooves and torque to 250 in-lbs with a wrench. No press, no dies, no hydraulic tool, and it can be taken apart later for line work or re-tapping. A compression connector is permanent and needs the matching die set and tool. For overhead and underground distribution taps, splices, and grounding and bonding where crews need to work with hand tools, the bolted clamp is the practical pick.
6) What is the exact part number and top wire size for this Burndy clamp?
Burndy part number UCG28RS. Top rated wire size is 4/0 AWG, with the full range being 1/0-4/0 AWG on the A side and 6-4/0 AWG on the B side. If you need a tap smaller than 6 AWG or a main larger than 4/0, this is not the right clamp in the UCG family.
7) I searched for an electrical connector and got both the Burndy UCG28RS and the Leviton ML2-C - what is the difference?
They solve different problems. The Burndy UCG28RS is an aluminum alloy parallel groove clamp for utility overhead and underground distribution work, making bolted tap and splice connections between stranded copper/aluminum and ACSR conductors up to 4/0 AWG at 250 in-lbs installation torque. The Leviton ML2-C is a midget connector for electrical wiring in the ML2 series, supplied 100 to a pack. If the job is a distribution line tap or splice on large stranded conductor, the UCG28RS is the fitting; the ML2-C is a wiring device.
8) Is the Burndy UCG28RS suitable for hospital or healthcare facility branch wiring like the Leviton 8319-C?
No. The Leviton 8319-C is a hospital grade NEMA 5-20R connector, a cord-connected wiring device sold in packs of 100 for patient-care area use. The Burndy UCG28RS is a mechanical aluminum alloy parallel groove clamp for conductor-to-conductor bolted connections on overhead and underground distribution systems, grounding and bonding included, with a 1/2-inch bolt and 250 in-lbs torque spec. For facility branch circuit devices, the 8319-C is the relevant item; for service or distribution conductor taps feeding the facility, the UCG28RS is.
9) Is the Burndy UCG28RS suitable for underground as well as overhead work?
Both. Burndy lists the UCG28RS for utility overhead and underground distribution systems, including line construction, maintenance and repair, plus grounding and bonding of distribution conductors. The aluminum alloy body is the standard utility material for these outdoor bolted connections.
10) Does the Burndy UCG28RS mount in a 4 inch square box like the RACO 232MSCM?
No, and the two are not alternatives. The RACO 232MSCM is a 4 in. square welded box, 2-1/8 in. deep, with a STAB-IT connector and M bracket - an enclosure that mounts to structure. The Burndy UCG28RS is a bolted parallel groove clamp that clamps directly onto the conductors themselves, one- or two-wrench installation at 250 in-lbs, for line construction, maintenance, and repair. It needs no box and provides no enclosure.
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Does the Burndy UCG28RS come with a warranty?
Absolutely. The Burndy UCG28RS is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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