Milbank 13 Terminal Ringless M...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,750.20
Milbank UC4288 13 Terminal Ringless Meter Socket - Small Closing Plate, Test Switch Prewired with Cover (Configuration 81)

Milbank 13 Terminal Ringless Meter Socket 20A 3 Phase 600V with Test Switch and Small Closing Plate

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Model: UC4288-XL-WC-81

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

$1,750.20
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Milbank 13 Terminal Ringless Meter Socket 20A 3 Phase 600V with Test Switch and Small Closing Plate

Professional metering solution for commercial and industrial applications

The Milbank 13 Terminal Ringless Meter Socket delivers reliable 3 phase power metering with 20 continuous ampere rating and 600V AC capacity. Featuring G90 galvanized steel construction with powder coat finish and Type 3R enclosure rating, this surface mount meter socket provides durable performance for overhead or underground cable entry applications. The unit includes a prewired test switch with cover and small closing plate for complete installation flexibility.

Professional Features & Benefits

  • 20 Continuous Ampere Rating: Provides reliable current handling capacity for commercial metering applications with consistent performance.
  • 3 Phase 600V AC: Supports high-voltage commercial and industrial power systems with professional-grade electrical specifications.
  • 13 Terminal Configuration: Offers comprehensive connection options for complex metering installations and load management requirements.
  • G90 Galvanized Steel with Powder Coat: Delivers superior corrosion resistance and long-term durability in demanding environmental conditions.
  • Type 3R Enclosure Rating: Provides weather-resistant protection suitable for outdoor installations and harsh operating environments.
  • UL Listed Certification: Ensures compliance with safety standards and professional installation requirements for commercial applications.
  • Overhead or Underground Entry: Accommodates flexible cable routing options for diverse installation scenarios and site requirements.

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
  • 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: 5.125 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 5.125L x 12W x20H
  • Product Type: Ringless Meter Socket
  • Special Features: Comision Federal De Electricdad
  • 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
  • Manufacturing Operations
  • Retail and Office Buildings
  • Municipal and Government Facilities
  • Educational Institutions

Why Choose Milbank Quality?

Milbank delivers proven reliability with UL Listed certification and Type 3R weather-resistant construction. The G90 galvanized steel with powder coat finish ensures long-term durability, while glass polyester insulation provides superior electrical performance. Professional surface mount design with ground lug equipment grounding supports safe, code-compliant installations for demanding commercial and industrial applications.

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
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:
5.125 IN
Product Size:
5.125L x 12W x20H
Product Type:
Ringless Meter Socket
Special Features:
Comision Federal De Electricdad
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
Insulation Type:
Glass Polyester
Hub Style:
Small Closing Plate
Installation Category:
Surface Mount
Terminal Type:
Single Mechanical
Number of Phases:
3
Frequency:
60 hertz
Product Details:
Ringless Meter Socket
Number of Terminations:
13
Product Group:
Power Distribution

Milbank UC4288-XL-WC-81 – Frequently Asked Questions

1) Will a Milbank UC4288 13 terminal ringless meter socket work on a 3 phase 4 wire 600V service?
The UC4288-XL-WC-81 is built for 3 phase metering at 600 volts AC, 60 Hertz, with a 13 terminal (13 jaw) socket. A 13 jaw socket is what a utility specifies for transformer-rated 3 phase metering, and the 20 continuous ampere rating is the socket's own current rating, not the service size, because current transformers carry the load and feed the socket. If your utility's meter is a self-contained 3 phase meter drawing full load current, this is the wrong socket type for you.
2) Why is the Milbank UC4288 meter socket only rated 20 amps if my service is 400 or 800 amps?
Because it is a CT-rated socket, not a self-contained one. The 20 continuous ampere rating covers the secondary current coming from the instrument transformers, and the product family code CT20 says the same thing. Service conductors never land in this can; they pass through separately mounted current transformers, and only the CT secondary leads and potential leads come into the 13 terminal socket. There is no bypass provision and no main breaker in the enclosure.
3) Can the Milbank UC4288 CT socket be mounted outdoors?
Yes. The enclosure carries a Type 3R rating and is UL Listed, so it's suited to outdoor rain and weather exposure. The shell is G90 galvanized steel with a powder coat finish. Type 3R is rain and sleet protection, not dust-tight or washdown, so keep it off surfaces that get hosed down or see heavy airborne dust.
4) Does the Milbank UC4288-XL-WC-81 come with the test switch already wired in?
The test switch is prewired with its cover, which is what the -WC-81 configuration means. That saves the electrician from field-wiring the test block, and it's what most utilities require on a transformer-rated installation so a meter tech can verify the CT circuit without opening the secondary. Terminals are single mechanical type.
5) Can I bring conduit into the top of the Milbank UC4288 socket, or is it underground feed only?
Either. The socket is set up for overhead or underground cable entry. It ships with a small closing plate over the hub opening, so if you're coming in overhead you swap that plate for a hub sized to your conduit; if you're feeding from below or from the back, the closing plate stays on and seals the opening. The hub is ordered separately.
6) What does ringless mean on a Milbank meter socket, and will my utility accept it?
Ringless means there is no separate sealing ring around the meter; the cover itself laps over the meter flange and is sealed by the utility. Ringless and ring-type are not interchangeable, and each utility specifies one or the other in its service handbook. Check which style your utility requires before ordering the UC4288, since a ring-type jurisdiction will reject a ringless can on inspection.
7) Do I need a separate disconnect or breaker with the Milbank UC4288 CT meter socket?
Yes, if your installation needs one. This is a metering enclosure only: zero main breakers, zero receptacles, and one meter position. Service disconnecting means, overcurrent protection, and the CT enclosure itself are all separate items on the same job. Grounding is handled at a ground lug provided in the can.
8) How much wall space do I need for a Milbank UC4288 CT meter socket, and how does it mount?
Plan on a footprint of 5.125 x 12 x 20 inches, with 20 inches being the height and 12 inches the width. It's a surface mount enclosure, so it fastens flat to a wall or a strut rack, not flush into the wall. Leave working clearance in front per your inspector's reading of the code, and keep the meter face at the height your utility requires.
9) Can I use one Milbank UC4288 socket to meter two tenants?
No. It has a single meter position, so it serves one metered account. Multi-tenant buildings need either one socket per tenant or a multi-position meter stack or pack sized to the number of units.
10) Is the Milbank UC4288 socket suitable for a 480Y/277V commercial service?
Yes, its 600 volt AC rating covers 480Y/277V and any lower 3 phase system voltage at 60 Hertz. Internal insulation is glass polyester, which is the standard barrier material for these higher-voltage metering cans. Since it's transformer-rated at 20 amperes, the CTs sized to your service determine how much load it can meter.
How fast can I get the Milbank UC4288-XL-WC-81 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 UC4288-XL-WC-81 come with a warranty?
Absolutely. The Milbank UC4288-XL-WC-81 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 UC4288-XL-WC-81?
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 UC4288-XL-WC-81 from ZenSupply?
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