Milbank 320A Ringless Meter So...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,476.13
Milbank U5759 4 Terminal Ringless Meter Socket - Large Closing Plate Lever Bypass, Dual Main Breaker Options

Milbank 320A Ringless Meter Socket with Dual Main Breaker and Lever Bypass System

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Model: U5759-X

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

$3,476.13
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Milbank 320A Ringless Meter Socket with Dual Main Breaker and Lever Bypass System

Professional electrical metering solution with integrated main breaker protection

The Milbank 320A Ringless Meter Socket delivers reliable electrical metering and distribution with dual main breaker options and convenient lever bypass functionality. This 1-phase, 240V system features robust G90 galvanized steel construction with powder coat finish and UL Listed Type 3R rating for dependable outdoor performance. The 4-terminal design accommodates wire ranges from 1 AWG to 300 kcmil with professional 3/8 inch stud terminals and dual barrel ground lugs for secure connections.

Professional Features & Benefits

  • 320 Continuous Ampere Rating: Handles substantial electrical loads for residential and light commercial applications with reliable capacity.
  • Dual Main Breaker Configuration: Provides enhanced electrical protection and distribution flexibility with two integrated main breakers.
  • Lever Bypass Provision: Enables convenient maintenance and service operations without complete power interruption.
  • UL Listed Type 3R Enclosure: Weather-resistant construction ensures reliable outdoor performance and code compliance.
  • G90 Galvanized Steel Construction: Durable material with powder coat finish provides long-term corrosion resistance and structural integrity.
  • 4-Terminal Ringless Design: Professional metering interface accommodates utility requirements with secure jaw connections.
  • Wide Wire Range Compatibility: Accepts conductors from 1 AWG to 300 kcmil for versatile installation requirements.

Technical Specifications

  • Amperage Rating: 320 Continuous Ampere
  • Application: Meter Socket With Main
  • Brand Name: Milbank
  • Bypass Provision: Lever Bypass
  • Departent: Electrical
  • Equipment Ground: 2 Barrel Ground Lug
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Large Closing Plate
  • Insulation: Glass Polyester
  • Load Side Wire Range: 1 AWG - 300 kcmil
  • Number Of Jaws: 4 Terminal
  • Number Of Main Breakers: 2
  • Number Of Meter Positions: 1 Position
  • Number Of Receptacles: 0
  • Phase: 1 Phase
  • Product Length: 4.844 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Type: Ringless Meter Socket
  • Standard: UL Listed;Type 3R
  • Terminal: 3/8 Inch Stud
  • Unspsc Number: 39121102
  • Voltage Rating: Up to 240 Volts Alternating Current
  • Width: 15 IN

Professional Applications

  • Residential Service Entrance Applications
  • Light Commercial Electrical Distribution
  • Multi-Unit Residential Properties
  • Professional Office Buildings
  • Retail and Commercial Establishments
  • Industrial Facility Electrical Systems
  • Utility Metering Infrastructure

Why Choose Milbank Quality?

Milbank delivers proven electrical distribution solutions with UL Listed certification and Type 3R weather-resistant construction. The robust G90 galvanized steel material with powder coat finish ensures long-term durability and reliable performance in demanding electrical applications.

Manufacturer Resources

Product Specs

Amperage Rating:
320 Continuous Ampere
Application:
Meter Socket With Main
Brand Name:
Milbank
Bypass Provision:
Lever Bypass
Equipment Ground:
2 Barrel Ground Lug
Frequency Rating:
60 Hertz
Hub Closing Plate:
Large Closing Plate
Insulation:
Glass Polyester
Load Side Wire Range:
1 AWG - 300 kcmil
Number Of Jaws:
4 Terminal
Number Of Main Breakers:
2
Number Of Meter Positions:
1 Position
Number Of Receptacles:
0
Phase:
1 Phase
Product Length:
4.844 IN
Product Type:
Ringless Meter Socket
Standards:
UL Listed;Type 3R
Terminal:
3/8 Inch Stud
Unspsc Number:
39121102
Voltage Rating:
Up to 240 Volts Alternating Current
Product Material:
G90 Galvanized Steel with Powder Coat Finish
Product Mounting:
Surface Mount
Amps:
320
Product Width:
15 IN
Department:
Electrical
Product Subgroup:
Electrical
Insulation Type:
Glass Polyester
Hub Style:
Large Closing Plate
Installation Category:
Surface Mount
Terminal Type:
3/8 Inch Stud
Number of Phases:
1
Product Details:
Ringless Meter Socket
Frequency:
60 hertz
Number of Terminations:
4

Milbank U5759-X – Frequently Asked Questions

1) Will the Milbank U5759-X meter socket handle a 320 amp / 400 amp class residential service?
The U5759-X is rated 320 continuous amperes, single phase, up to 240 volts AC at 60 Hertz. That is the standard 320A continuous rating utilities call a 400 amp class service, and it is the socket you use when the service exceeds 200A. It is a single meter position with a 4 terminal ringless jaw configuration, so it serves one metered service, not two.
2) What size service conductors can I land in the Milbank U5759 meter socket?
Load side terminals take 1 AWG through 300 kcmil on 3/8 inch studs. That range covers parallel or single conductor runs typical of a 320A service, and the stud terminals mean you are landing lugs or compression terminals rather than setscrew barrels. Equipment ground is handled by two barrel ground lugs.
3) What is the difference between the two Milbank U5759-X options, lever bypass and no bypass?
Two builds. The U5759-X is the lever bypass version with dual main breaker provision, meaning the meter can be pulled and serviced without dropping the service. The U5759-X-2/200 has no bypass and comes with dual 200A main breakers. Pick by what the serving utility requires: many utilities mandate bypass on 320A class sockets, and some do not permit it. Confirm with the utility before ordering, because the bypass choice cannot be added later.
4) Does the Milbank U5759-X come with the main breakers installed, or do I buy them separately?
Depends on the build. The U5759-X-2/200 ships as a dual 200A main breaker unit. The U5759-X is the dual main breaker provision version, so it is the enclosure and metering section prepped to accept two mains, and you specify the breakers to suit the service split. Either way the configuration is two mains feeding off one 320A metered service.
5) Can the Milbank U5759 ringless meter socket be mounted outdoors on an exterior wall?
Yes. It is UL Listed with a Type 3R enclosure, which is the rain tight rating for outdoor service equipment, and the body is G90 galvanized steel with a powder coat finish for corrosion resistance. It is a surface mount unit, so it fastens to the wall face rather than recessing into it.
6) Do I need a meter ring for the Milbank U5759, and will my utility accept a ringless socket?
No ring is used. The U5759 is a ringless socket, meaning the cover itself locks over the meter and the utility seals the cover rather than a ring band. Utilities specify one style or the other in their service handbook and they are not interchangeable, so if the utility spec calls for a ring type socket this is the wrong unit. It also ships with a large closing plate for the unused hub opening.
7) Can I feed two panels from one 320A Milbank meter socket instead of setting a second meter?
That is exactly what the dual main configuration is for. One metered 320A service, single meter position, split into two main breakers so you can feed two separate panels, for example a house panel and a shop or an accessory dwelling, from one utility meter. If you need each unit metered and billed separately, this is not the right socket, you want a multi position meter stack.
8) How wide is the Milbank U5759 meter socket, and how far does it stand off the wall?
The enclosure measures 15 inches wide with a 4.844 inch dimension on the product length. Worth checking against your available wall space and any clearance the utility requires around the meter before you set the backing.
9) Does the Milbank 320A socket have a place to plug in a generator or add receptacles?
No receptacles. The U5759 is metering and main breaker distribution only, with zero receptacle positions in the enclosure. If the job calls for a GFCI convenience outlet or a generator inlet at the service, that gets mounted and fed separately.
10) Can a meter be pulled on the Milbank U5759-X without killing power to the building?
On the lever bypass build, yes. The lever bypass carries the load around the meter socket jaws so the utility or an electrician can pull and change the meter with the service energized. The U5759-X-2/200 has no bypass, so a meter pull there means the service is dead until the meter is back in.
11) Is the Milbank U5759 suitable for a three phase commercial service?
No. It is a single phase socket rated up to 240 volts AC with 4 terminal jaws, which is the standard single phase 120/240V residential and light commercial arrangement. A three phase service needs a 7 jaw socket, so this one will not meet the utility's requirement on that job.
12) What insulates the meter jaws in the Milbank U5759, and will it hold up in a hot or humid service location?
Jaw insulation is glass polyester, a thermoset that holds its dielectric and dimensional stability under heat, which matters on a 320A continuous socket where the jaws run warm. Outside that, the G90 galvanized steel shell with powder coat handles the weather side in the Type 3R enclosure.
How fast can I get the Milbank U5759-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 U5759-X come with a warranty?
Absolutely. The Milbank U5759-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 U5759-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 U5759-X from ZenSupply?
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