Milbank 3-Phase Ringless Meter...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,000.23
Milbank UC4279-XL-21-LI 13 Terminal Ringless Small Closing Plate Test Switch Prewired Test Switch Cover Configuration 21 LISCO Approved

Milbank 3-Phase Ringless Meter Socket 20A 600V 13 Terminal with Small Closing Plate LISCO Approved

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Model: UC4279-XL-21-LI

In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,000.23
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Milbank 3-Phase Ringless Meter Socket 20A 600V 13 Terminal with Small Closing Plate LISCO Approved

Professional 3-Phase Metering Solution with LISCO Approval

The Milbank 3-Phase Ringless Meter Socket delivers reliable 20 continuous ampere service at 600V AC for professional electrical installations. This UL Listed Type 3R enclosure features G90 galvanized steel construction with powder coat finish, 13 terminal configuration, and specialized LISCO approval for Long Island Lighting Company applications. The surface mount design accommodates overhead or underground cable entry with single mechanical terminals and glass polyester insulation for dependable performance.

Professional Features & Benefits

  • 20 Continuous Ampere Rating: Provides reliable current handling capacity for consistent 3-phase metering applications
  • 600V AC 3-Phase Configuration: Supports high-voltage commercial and industrial electrical systems with professional-grade voltage handling
  • UL Listed Type 3R Enclosure: Weather-resistant protection ensures reliable outdoor operation and code compliance
  • G90 Galvanized Steel Construction: Durable material with powder coat finish provides long-term corrosion resistance and structural integrity
  • 13 Terminal Ringless Design: Simplified installation with secure electrical connections and reduced maintenance requirements
  • LISCO Approved Specification: Meets Long Island Lighting Company requirements for utility-approved metering installations
  • Overhead/Underground Cable Entry: Versatile installation options accommodate various service entrance configurations

Technical Specifications

  • Amperage Rating: 20 Continuous Ampere
  • Application: Meter Socket
  • Brand Name: Milbank
  • Bypass Provision: No Bypass
  • Cable Entry: Overhead or Underground
  • Departent: Electrical
  • Equipment Ground: Ground Lug
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Small Closing Plate
  • Insulation: Glass Polyester
  • Line Side Wire Range: 12 - 10 AWG
  • Load Side Wire Range: 12 - 10 AWG
  • Main Breaker Size: No Main Breaker
  • Number Of Jaws: 13 Terminal
  • Number Of Main Breakers: 0
  • Number Of Meter Positions: 1 Position
  • Number Of Receptacles: 0
  • Phase: 3 Phase
  • Product Family Code: CT20
  • Product Height: 20 IN
  • Product Length: 4.125 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 4.125L x 12W x20H
  • Product Type: Ringless Meter Socket
  • Special Features: Long Island Lighting Company
  • Standard: UL Listed;Type 3R
  • Terminal: Single Mechanical
  • Unspsc Number: 39121102
  • Voltage Rating: 600 Volts Alternating Current
  • Width: 12 IN

Professional Applications

  • Commercial Building Metering
  • Industrial Facility Power Distribution
  • Multi-Tenant Properties
  • Utility Service Entrance Points
  • LISCO Territory Installations
  • 3-Phase Electrical Systems
  • Professional Electrical Contracting

Why Choose Milbank Quality?

Milbank delivers proven reliability with UL Listed Type 3R certification and specialized LISCO approval for utility compliance. The G90 galvanized steel construction with powder coat finish ensures long-term durability, while the 13 terminal ringless design provides professional-grade electrical connections for dependable 3-phase metering service.

Manufacturer Resources

Product Specs

Amperage Rating:
20 Continuous Ampere
Application:
Meter Socket
Brand Name:
Milbank
Bypass Provision:
No Bypass
Cable Entry:
Overhead or Underground
Equipment Ground:
Ground Lug
Frequency Rating:
60 Hertz
Hub Closing Plate:
Small Closing Plate
Insulation:
Glass Polyester
Line Side Wire Range:
12 - 10 AWG
Load Side Wire Range:
12 - 10 AWG
Main Breaker Size:
No Main Breaker
Number Of Jaws:
13 Terminal
Number Of Main Breakers:
0
Number Of Meter Positions:
1 Position
Number Of Receptacles:
0
Phase:
3 Phase
Product Family Code:
CT20
Product Height:
20 IN
Product Length:
4.125 IN
Product Size:
4.125L x 12W x20H
Product Type:
Ringless Meter Socket
Special Features:
Long Island Lighting Company
Standards:
UL Listed;Type 3R
Terminal:
Single Mechanical
Unspsc Number:
39121102
Voltage Rating:
600 Volts Alternating Current
Product Material:
G90 Galvanized Steel with Powder Coat Finish
Product Mounting:
Surface Mount
Amps:
20
Product Width:
12 IN
Department:
Electrical
Product Subgroup:
Metering & Meter Sockets
Product Group:
Power Distribution

Milbank UC4279-XL-21-LI – Frequently Asked Questions

1) Is the Milbank UC4279-XL-21-LI meter socket approved for use on Long Island?
Yes. The UC4279-XL-21-LI is LISCO approved, meaning it meets Long Island Lighting Company requirements for utility metering installations. That approval is the reason to pick this socket over a generic 13-jaw can: outside LISCO territory the utility approval carries no weight, and inside it, a non-approved socket will not pass inspection.
2) Why is a 3-phase 600V meter socket only rated 20 amps?
Because it is a CT-rated metering enclosure, not a self-contained service socket. The 20 continuous ampere rating and the 12 to 10 AWG line and load wire ranges are for the instrument transformer secondary wiring, not for the service conductors. Actual load current passes through separately mounted current transformers. If you are metering a service directly, you need a self-contained socket sized to the service amperage instead.
3) Can this meter socket be mounted outdoors?
Yes. The enclosure is UL Listed and rated Type 3R, which is the standard rain-tight classification for outdoor service equipment. The shell is G90 galvanized steel with a powder coat finish for corrosion resistance, so it holds up on exterior walls and in coastal Long Island conditions.
4) Does the Milbank UC4279-XL-21-LI include a main breaker or a bypass?
No to both. It is a straight metering enclosure with no main breaker and no bypass provision, so the service disconnect has to be provided separately downstream. There are also no receptacles in the cabinet. Equipment grounding is handled by the built-in ground lug.
5) Will a 13 jaw meter fit this socket, and how many meters does it take?
The socket is built for a single 13 terminal meter position, which is the jaw count used for 3-phase 4-wire transformer-rated metering. One meter position only, so a multi-tenant building needs one cabinet per metered service. A 7-jaw or 4-jaw meter will not seat in it.
6) What size wall space do I need for this Milbank CT cabinet?
Plan for a surface mounted enclosure measuring 4.125 inches deep by 12 inches wide by 20 inches high. It mounts flat to the wall or meter pole backboard, so allow working clearance in front of the cover plus room above or below for the service raceway, since cable can enter overhead or underground.
7) What does ringless mean and will my utility accept it?
Ringless means the cover slides over the meter and is secured to the enclosure instead of being clamped by a sealing ring around the meter rim. Some utilities specify ringless, others ring-type, so it is dictated by the serving utility. This one is built to the LISCO specification, which is where it belongs.
8) What is the small closing plate on this Milbank socket for?
The small closing plate covers the hub opening on top of the enclosure when you are not fitting a conduit hub. If the service comes in underground from below, you leave the plate in place. For overhead entry you remove it and install the hub sized to your raceway, which is ordered separately.
How fast can I get the Milbank UC4279-XL-21-LI delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Milbank UC4279-XL-21-LI come with a warranty?
Absolutely. The Milbank UC4279-XL-21-LI is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Milbank UC4279-XL-21-LI?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Milbank UC4279-XL-21-LI from ZenSupply?
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