Milbank 7 Terminal Ringless Me...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,058.23
Milbank 7 Terminal Ringless Meter Socket Large Closing Plate Lever Bypass Side Bussed, 1 Position 320 Ampere

Milbank 7 Terminal Ringless Meter Socket 320 Ampere 3 Phase with Lever Bypass

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Model: U2120-X

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

$1,058.23
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Milbank 7 Terminal Ringless Meter Socket 320 Ampere 3 Phase with Lever Bypass

Professional electrical metering solution with lever bypass functionality

The Milbank 7 Terminal Ringless Meter Socket delivers reliable 320 continuous ampere service at 600 volts AC for 3 phase applications. Constructed with G90 galvanized steel and powder coat finish in a Type 3R enclosure, this surface mount meter socket features lever bypass provision and accommodates overhead, underground, and side wireway cable entry options. Glass polyester insulation and grounding stud provide enhanced safety and performance.

Professional Features & Benefits

  • 320 Continuous Ampere Rating: Handles high-capacity electrical loads for demanding commercial and industrial applications
  • 7 Terminal Configuration: Provides comprehensive metering connections for complex electrical systems
  • Lever Bypass Provision: Enables safe meter maintenance and replacement without service interruption
  • Type 3R Enclosure: Weather-resistant construction suitable for outdoor installations and harsh environments
  • G90 Galvanized Steel Construction: Superior corrosion resistance and long-term durability with powder coat finish
  • Flexible Cable Entry: Accommodates overhead, underground, and side wireway connections for versatile installation options
  • UL Listed: Meets rigorous safety standards for professional electrical installations

Technical Specifications

  • Amperage Rating: 320 Continuous Ampere
  • Application: Meter Socket
  • Brand Name: Milbank
  • Bypass Provision: Lever Bypass
  • Cable Entry: Overhead and Underground and Side Wireway
  • Departent: Electrical
  • Equipment Ground: Grounding Stud
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Large Closing Plate
  • Insulation: Glass Polyester
  • Line Side Wire Range: 4 AWG - 600 kcmil or Two 1/0 AWG - 250 kcmil
  • Load Side Wire Range: 4 AWG - 600 kcmil or Two 1/0 AWG - 250 kcmil
  • Main Breaker Size: No Main Breaker
  • Number Of Jaws: 7 Terminal
  • Number Of Main Breakers: 0
  • Number Of Meter Positions: 1 Position
  • Number Of Receptacles: 0
  • Phase: 3 Phase
  • Product Family Code: 7T32
  • Product Height: 31.75 IN
  • Product Length: 6.5 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 6.5L x 17.75W x31.75H
  • Product Type: Ringless Meter Socket
  • Standard: UL Listed;Type 3R
  • Unspsc Number: 39121102
  • Voltage Rating: 600 Volts Alternating Current
  • Width: 17.75 IN

Professional Applications

  • Commercial Buildings and Office Complexes
  • Industrial Facilities and Manufacturing Plants
  • Multi-Unit Residential Properties
  • Retail and Shopping Centers
  • Healthcare and Educational Facilities
  • Municipal and Government Buildings
  • Data Centers and Telecommunications

Why Choose Milbank Quality?

Milbank meter sockets deliver proven reliability with UL Listed safety certification and Type 3R weather-resistant construction. The G90 galvanized steel with powder coat finish ensures long-term performance in demanding environments, while the comprehensive 7 terminal configuration and lever bypass provision provide professional-grade functionality for critical electrical metering applications.

Manufacturer Resources

Product Specs

Amperage Rating:
320 Continuous Ampere
Application:
Meter Socket
Brand Name:
Milbank
Bypass Provision:
Lever Bypass
Cable Entry:
Overhead and Underground and Side Wireway
Equipment Ground:
Grounding Stud
Frequency Rating:
60 Hertz
Hub Closing Plate:
Large Closing Plate
Insulation:
Glass Polyester
Line Side Wire Range:
4 AWG - 600 kcmil or Two 1/0 AWG - 250 kcmil
Load Side Wire Range:
4 AWG - 600 kcmil or Two 1/0 AWG - 250 kcmil
Main Breaker Size:
No Main Breaker
Number Of Jaws:
7 Terminal
Number Of Main Breakers:
0
Number Of Meter Positions:
1 Position
Number Of Receptacles:
0
Phase:
3 Phase
Product Family Code:
7T32
Product Height:
31.75 IN
Product Length:
6.5 IN
Product Size:
6.5L x 17.75W x31.75H
Product Type:
Ringless Meter Socket
Standards:
UL Listed;Type 3R
Unspsc Number:
39121102
Voltage Rating:
600 Volts Alternating Current
Product Material:
G90 Galvanized Steel with Powder Coat Finish
Product Mounting:
Surface Mount
Amps:
320
Product Width:
17.75 IN
Department:
Electrical
Product Subgroup:
Electrical
Insulation Type:
Glass Polyester
Hub Style:
Large Closing Plate
Installation Category:
Surface Mount
Number of Phases:
3
Product Details:
Ringless Meter Socket
Frequency:
60 hertz
Number of Terminations:
7
Product Group:
Metering & Service Entrance

Milbank U2120-X – Frequently Asked Questions

1) Will a 7 terminal meter socket work for a 3 phase 4 wire service?
The Milbank U2120-X is a 7 jaw socket built for 3 phase metering at up to 600 volts AC, 60 Hz. Seven jaws is the standard configuration for 3 phase 4 wire network metering. If your utility is metering a single phase service, you need a 4 jaw or 5 jaw socket instead, not this one.
2) What size service conductors will the Milbank U2120-X accept?
Both line and load terminals take 4 AWG through 600 kcmil single conductors, or two conductors per terminal in the 1/0 AWG to 250 kcmil range for parallel runs. That range covers typical 320 amp copper or aluminum service entrance conductors without adapters.
3) Does this Milbank meter socket include a main breaker or disconnect?
No. The U2120-X is a meter socket only, with no main breaker and one meter position. You feed it from the utility and land the load side conductors in a separate service disconnect or panel. If you need metering and overcurrent protection in one enclosure, you want a meter main combination instead.
4) What is the difference between the U2120-X, U2120-X-K7 and U2120-X-2/K7?
The base U2120-X ships as the standard socket. The -K7 version adds a single 4-600 kcmil connector, and the -2/K7 adds two single 4-600 kcmil connectors. The choice comes down to how many conductors you are landing per terminal, so pick the connector option that matches your service entrance run rather than ordering lugs separately.
5) Can this 320 amp meter socket be mounted outdoors on an exterior wall?
Yes. It is a Type 3R rainproof enclosure in G90 galvanized steel with a powder coat finish, surface mounted, so an exterior wall is the intended location. It is UL Listed. For indoor mechanical rooms it works equally well, but Type 3R is not rated for washdown or dust-tight areas.
6) Does the lever bypass let the utility pull the meter without killing power to the building?
That is the point of it. The lever bypass shunts current around the meter socket jaws so a meter can be tested, changed, or removed while the service stays energized. Utilities in many jurisdictions require bypass on 320 amp class services, so confirm your serving utility accepts a lever type rather than a horn type before you set it.
7) How much wall space do I need for the Milbank 7 terminal 320A socket?
The enclosure measures 6.5 inches deep by 17.75 inches wide by 31.75 inches high. Allow for that full height when laying out the meter location against utility height requirements, plus working clearance in front per your local code.
8) Can I bring conductors in from underground, or does this socket only take an overhead service?
Both work. Cable entry is rated for overhead, underground, and side wireway, so it suits a service mast, a lateral coming up from below, or a gutter feed from adjacent equipment. A large hub closing plate is part of the build for the overhead hub opening when you are not using it.
9) Is this a ringless or ring type meter socket, and does that matter for my utility?
Ringless. The cover fits over the meter and is secured by the utility seal instead of a sealing ring around the meter rim. Utilities specify one style or the other for their territory and they are not interchangeable in the field, so check your utility's approved meter equipment list before ordering.
10) Is there a place to land the equipment grounding conductor in this Milbank socket?
A grounding stud is provided inside the enclosure for the equipment ground. Current carrying parts are isolated on glass polyester insulation, which holds up better than phenolic at the temperatures a 320 amp service sees.
How fast can I get the Milbank U2120-X 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 U2120-X come with a warranty?
Absolutely. The Milbank U2120-X 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 U2120-X?
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 U2120-X from ZenSupply?
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