Milbank 320A Ringless Meter So...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$846.77
Milbank U4741-X 4 Terminal Ringless Large Closing Plate Lever Bypass Stud Type 250kcmil Maximum

Milbank 320A Ringless Meter Socket with Lever Bypass 1-Phase 600V Surface Mount

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Model: U4741-X

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

$846.77
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Milbank 320A Ringless Meter Socket with Lever Bypass 1-Phase 600V Surface Mount

Professional electrical metering solution with integrated bypass capability

The Milbank 320A Ringless Meter Socket delivers reliable electrical metering with integrated lever bypass functionality for professional installations. This 1-phase, 600V unit features a robust G90 galvanized steel construction with powder coat finish and Type 3R rating for versatile indoor and outdoor applications. The 4-terminal design with 3/8 inch stud terminals accommodates up to 250kcmil conductors, while the large closing plate and glass polyester insulation ensure secure, long-lasting performance.

Professional Features & Benefits

  • 320 Continuous Ampere Rating: Handles substantial electrical loads for commercial and residential applications with reliable current capacity.
  • Lever Bypass Provision: Enables safe meter maintenance and replacement without interrupting power service to the facility.
  • Type 3R Enclosure Rating: Weather-resistant construction suitable for both indoor and outdoor installations with protection against rain and sleet.
  • G90 Galvanized Steel Construction: Durable material with powder coat finish provides superior corrosion resistance and long-term reliability.
  • 4-Terminal Ringless Design: Accommodates up to 250kcmil conductors with 3/8 inch stud terminals for secure electrical connections.
  • UL Listed Certification: Meets rigorous safety standards ensuring code compliance and professional installation confidence.
  • Overhead or Underground Cable Entry: Versatile connection options accommodate various installation requirements and utility configurations.

Technical Specifications

  • Amperage Rating: 320 Continuous Ampere
  • Application: Meter Socket
  • Brand Name: Milbank
  • Bypass Provision: Lever Bypass
  • Cable Entry: Overhead or Underground
  • Departent: Electrical
  • Equipment Ground: Ground Lug
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Large Closing Plate
  • Insulation: Glass Polyester
  • Main Breaker Size: No Main Breaker
  • Number Of Jaws: 4 Terminal
  • Number Of Main Breakers: 0
  • Number Of Meter Positions: 1 Position
  • Number Of Receptacles: 0
  • Phase: 1 Phase
  • Product Family Code: 4T32
  • Product Height: 28.75 IN
  • Product Length: 4.844 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 4.844L x 15W x28.75H
  • Product Type: Ringless Meter Socket
  • Standard: UL Listed;Type 3R
  • Terminal: 3/8 Inch Stud
  • Unspsc Number: 39121102
  • Voltage Rating: 600 Volts Alternating Current
  • Width: 15 IN

Professional Applications

  • Residential Service Entrance Metering
  • Commercial Building Electrical Systems
  • Multi-Unit Property Installations
  • Industrial Facility Power Distribution
  • Utility Company Metering Requirements
  • Electrical Contractor Projects
  • Building Renovation and Upgrade Projects

Why Choose Milbank Quality?

Milbank delivers proven reliability with UL Listed certification and Type 3R weather-resistant construction. The robust G90 galvanized steel with powder coat finish ensures long-term durability, while the professional 4-terminal design and lever bypass functionality provide the performance and serviceability that electrical professionals demand for critical metering applications.

Manufacturer Resources

Product Specs

Amperage Rating:
320 Continuous Ampere
Application:
Meter Socket
Brand Name:
Milbank
Bypass Provision:
Lever Bypass
Cable Entry:
Overhead or Underground
Equipment Ground:
Ground Lug
Frequency Rating:
60 Hertz
Hub Closing Plate:
Large Closing Plate
Insulation:
Glass Polyester
Main Breaker Size:
No Main Breaker
Number Of Jaws:
4 Terminal
Number Of Main Breakers:
0
Number Of Meter Positions:
1 Position
Number Of Receptacles:
0
Phase:
1 Phase
Product Family Code:
4T32
Product Height:
28.75 IN
Product Length:
4.844 IN
Product Size:
4.844L x 15W x28.75H
Product Type:
Ringless Meter Socket
Standards:
UL Listed;Type 3R
Terminal:
3/8 Inch Stud
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:
15 IN
Department:
Electrical
Product Subgroup:
Metering & Meter Sockets
Product Group:
Power Distribution

Milbank U4741-X – Frequently Asked Questions

1) Does the Milbank U4741-X 320A meter socket include a main breaker?
No. The U4741-X is a meter socket only, with no main breaker and no receptacles. It has one meter position and a lever bypass for pulling the meter without dropping service. If the job needs service disconnect at the meter, you need a separate main breaker enclosure or a meter-main combination unit instead.
2) What size conductors will the Milbank 320A ringless meter socket terminals accept?
The terminals are 3/8 inch stud type and take conductors up to 250kcmil. That covers typical 320A (400A rated) residential and light commercial service entrance runs, including parallel-free single 250kcmil copper or aluminum landings. An equipment ground lug is provided.
3) Can this Milbank meter socket be mounted outdoors on an exterior wall?
Yes. The U4741-X carries a Type 3R rating and is UL Listed, so it is built for outdoor wall mounting with protection against rain and sleet, as well as indoor use. It is a surface mount enclosure in G90 galvanized steel with a powder coat finish for corrosion resistance. It is not a flush or semi-flush unit.
4) Is a 4-terminal ringless socket the right choice, or do I need a 5-jaw or ring-type socket?
Four terminals is the standard configuration for single-phase 3-wire 120/240V service, which is what this unit is built for at 1 phase, 600V AC, 60 Hz. If your utility meters a network or a 120/208V single-phase network service, they typically require a 5-jaw socket instead, and that will not work here. Ringless versus ring-type is dictated by the serving utility, so confirm your utility accepts ringless before ordering.
5) Can I feed this Milbank socket from an underground service lateral, or is it overhead only?
Either. Cable entry is rated for overhead or underground, and the enclosure ships with a large closing plate over the hub opening. For an overhead drop you remove the closing plate and install the hub size your utility requires; for an underground lateral you leave the closing plate in place and bring the conductors in through the bottom.
6) Is a 320A meter socket the same thing as 400A service?
The U4741-X is rated 320 continuous amperes, which is the standard rating used for what the trade calls 400 amp residential service, 400A being the non-continuous rating at 80 percent. So yes, this is the socket used ahead of a 400A service with dual 200A panels or a 400A disconnect. Since there is no main breaker in the enclosure, overcurrent protection is downstream.
7) What does the lever bypass do and why would I pay for it over a no-bypass socket?
The lever bypass lets a lineman or meter tech shunt current around the meter socket jaws so the meter can be pulled and replaced without killing power to the building. For occupied commercial space, multi-family, or anything with tenants who cannot take an outage, it is usually a utility requirement rather than an option. Many utilities mandate bypass at 320A class service. If yours does not, a no-bypass socket is the simpler part.
8) What is the exact part number to specify for this Milbank ringless lever bypass socket?
Order Milbank U4741-X. It is the 4-terminal ringless, large closing plate, lever bypass, stud-type socket rated to 250kcmil, in Milbank product family 4T32.
9) What insulates the jaws in this meter socket, and will it hold up in a hot or damp location?
The jaw assembly is mounted on glass polyester insulation, which is the standard high-strength, moisture-resistant material for socket bases, paired with a G90 galvanized steel enclosure and powder coat finish. That combination is what gives the Type 3R outdoor rating on coastal and humid installations.
How fast can I get the Milbank U4741-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 U4741-X come with a warranty?
Absolutely. The Milbank U4741-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 U4741-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 U4741-X from ZenSupply?
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