Milbank 320A 1-Phase Ringless ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,049.79
Milbank U4980-X 4 Terminal Ringless Large Closing Plate Lever Bypass Side Bussed PEPCO

Milbank 320A 1-Phase Ringless Meter Socket with Lever Bypass and Large Closing Plate (9)

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Model: U4980-X

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

$1,049.79
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Milbank 320A 1-Phase Ringless Meter Socket with Lever Bypass and Large Closing Plate

Professional electrical metering solution with integrated bypass capability

The Milbank 320A 1-Phase Ringless Meter Socket delivers reliable electrical metering with integrated lever bypass functionality for professional installations. Featuring robust G90 galvanized steel construction with powder coat finish and Type 3R enclosure rating, this surface-mount meter socket provides 320 continuous ampere capacity at 600V AC with glass polyester insulation for enhanced durability and 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 service interruption through integrated bypass switching.
  • Type 3R Enclosure Rating: Provides weather-resistant protection suitable for outdoor installations and harsh environmental conditions.
  • G90 Galvanized Steel Construction: Delivers superior corrosion resistance and structural integrity with professional powder coat finish.
  • 4 Terminal Ringless Design: Simplifies installation with 3/8 inch stud terminals and eliminates need for separate terminal rings.
  • Large Closing Plate: Accommodates overhead or underground cable entry with versatile connection options.
  • UL Listed Certification: Ensures compliance with safety standards and code requirements for professional electrical installations.

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: 34.125 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 x34.125H
  • 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: 17.75 IN

Professional Applications

  • Commercial Building Electrical Services
  • Residential Service Entrance Applications
  • Multi-Unit Property Metering
  • Industrial Facility Power Distribution
  • Utility Company Metering Installations
  • Electrical Contractor Service Upgrades
  • Municipal and Government Facilities

Why Choose Milbank Quality?

Milbank delivers proven reliability through 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 ringless design and integrated lever bypass provide the performance and safety features demanded by electrical professionals.

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:
34.125 IN
Product Length:
6.5 IN
Product Size:
6.5L x 17.75W x34.125H
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:
17.75 IN
Department:
Electrical
Product Subgroup:
Metering & Meter Sockets
Product Group:
Power Distribution

Milbank U4980-X – Frequently Asked Questions

1) Does the Milbank U4980-X 320A meter socket include a main breaker or disconnect?
No. The U4980-X is a meter socket only, with no main breaker and no receptacles. You'll need a separate service disconnect or main breaker panel downstream to complete the service. It has one meter position, 4 jaws, and a lever bypass for pulling the meter without dropping the service.
2) Will a 4-jaw 320A Milbank socket work on a 120/240V single phase residential service?
Yes. The U4980-X is single phase, 4 terminal, rated 320 continuous amps at up to 600V AC, 60 Hz, which covers standard 120/240V single phase residential and light commercial service. A 4-jaw socket is the single-phase configuration; three-phase service needs a 7-jaw socket instead.
3) Can this Milbank 320A ringless socket be installed outdoors on an exterior wall?
Yes. It carries a Type 3R enclosure rating, which is the standard rain-tight rating for outdoor service equipment, and it's UL Listed. The body is G90 galvanized steel with a powder coat finish, and it mounts on the surface of the wall rather than flush.
4) Does the U4980-X accept overhead or underground service conductors?
Both. It ships with a large closing plate on the top hub opening, so you can knock it out and fit a service entrance hub for an overhead drop, or leave it closed and bring conductors up from below for an underground lateral.
5) How much wall space do I need for the Milbank U4980-X meter socket?
Plan for a footprint of 6.5 x 17.75 x 34.125 inches (length x width x height). It is a surface mount unit, so the full depth sits proud of the wall plus whatever clearance your utility requires in front of the meter.
6) What size lugs or terminals does this 320A Milbank socket have for the service conductors?
The line and load connections are 3/8 inch stud terminals, so you'll be landing ring-tongue or mechanical lugs suited to that stud size rather than setscrew lugs. There is also a ground lug provided for the equipment grounding conductor.
7) What does lever bypass do, and why would I specify it over a socket without bypass?
The lever bypass lets the utility or electrician shunt current around the meter so the meter can be pulled and swapped while the service stays energized. Many utilities require bypass on 320 amp class sockets. If you never need to service the meter under load, a non-bypass socket is simpler, but on a 320A service feeding a building you can't take down, bypass is what you want.
8) What is the difference between a ringless meter socket and a ring-type one?
A ringless socket like the Milbank U4980-X uses a hinged or lift-off cover that the utility seals directly, instead of a sealing ring clamping the meter to the socket. Which one you can install is dictated by the serving utility, not by preference, so confirm your utility accepts ringless before ordering.
9) Is the Milbank U4980-X rated for a 400 amp service?
No. It is a 320 continuous ampere socket, which is the standard rating used for what is commonly called a 400 amp residential class service (320A continuous / 400A intermittent). For a true 400 amp continuous service you need a higher-rated socket or a CT metering cabinet.
10) What insulation is used in the Milbank 320A socket jaw assembly?
Glass polyester. It holds up to heat and tracking better than plain thermoplastic, which matters on a 320 amp continuous service where the jaws carry load all day.
How fast can I get the Milbank U4980-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 U4980-X come with a warranty?
Absolutely. The Milbank U4980-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 U4980-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
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