Milbank 320A 1-Phase Ringless ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$827.30
Milbank U4419-X 5 Terminal Ringless Large Closing Plate Lever Bypass Center Flange Disconnect

Milbank 320A 1-Phase Ringless Meter Socket with Lever Bypass and Large Closing Plate (8)

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Model: U4419-X

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

$827.30
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Milbank 320A 1-Phase Ringless Meter Socket with Lever Bypass and Large Closing Plate

Professional meter socket 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 a robust G90 galvanized steel construction with powder coat finish and Type 3R 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 high-capacity electrical loads for demanding residential and commercial applications
  • Lever Bypass Provision: Enables safe meter maintenance and replacement without service interruption
  • Type 3R UL Listed: Weather-resistant enclosure suitable for outdoor installations with reliable protection
  • G90 Galvanized Steel Construction: Superior corrosion resistance and long-term durability in harsh environments
  • 5 Terminal Ringless Design: Simplified installation with secure 3/8 inch stud terminals for reliable connections
  • Large Closing Plate: Enhanced protection and professional appearance for overhead or underground cable entry
  • Glass Polyester Insulation: Superior electrical insulation properties for safe and reliable operation

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: Bonded Ground Strap
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Large Closing Plate
  • Insulation: Glass Polyester
  • Main Breaker Size: No Main Breaker
  • Number Of Jaws: 5 Terminal
  • Number Of Main Breakers: 0
  • Number Of Meter Positions: 1 Position
  • Number Of Receptacles: 0
  • Phase: 1 Phase
  • Product Family Code: 5T32
  • Product Height: 29 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 x29H
  • 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 Residential Properties
  • Industrial Facility Power Distribution
  • Utility Company Metering Installations
  • Electrical Contractor Service Upgrades
  • Municipal and Government Facilities

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 the bonded ground strap and glass polyester insulation provide enhanced safety and performance for professional electrical installations.

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:
Bonded Ground Strap
Frequency Rating:
60 Hertz
Hub Closing Plate:
Large Closing Plate
Insulation:
Glass Polyester
Main Breaker Size:
No Main Breaker
Number Of Jaws:
5 Terminal
Number Of Main Breakers:
0
Number Of Meter Positions:
1 Position
Number Of Receptacles:
0
Phase:
1 Phase
Product Family Code:
5T32
Product Height:
29 IN
Product Length:
4.844 IN
Product Size:
4.844L x 15W x29H
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:
Electrical
Product Group:
Metering & Service Entrance

Milbank U4419-X – Frequently Asked Questions

1) Will the Milbank U4419-X meter socket work for a 320A 200A-continuous residential service upgrade?
The Milbank U4419-X is rated 320 continuous amperes at 600V AC, single phase, 60 Hz, which is the standard 320A/400A class socket used for large residential and light commercial service entrances. It has one meter position and 5 terminal jaws, so it suits a single 120/240V single-phase self-contained meter. Note there is no main breaker in this enclosure, so overcurrent protection has to live downstream in your panel or a separate disconnect.
2) Does the U4419-X socket come with a main breaker or do I need a separate disconnect?
No breaker is included. The U4419-X carries a main breaker size of "No Main Breaker" and zero main breakers, so it is a straight meter socket only. You will need a separate service disconnect or a main breaker panel downstream to satisfy the service disconnecting means. It also has no receptacles built in.
3) Can this Milbank 320A ringless meter socket be mounted outdoors on an exterior wall?
Yes. The enclosure is UL Listed and rated Type 3R, which is the rain-tight outdoor rating utilities require for service entrance metering. It's a surface mount unit built from G90 galvanized steel with a powder coat finish, so it holds up on an exposed exterior wall.
4) What does lever bypass do on a meter socket, and do I need it?
Lever bypass lets the utility or a qualified tech close a bypass link so current keeps flowing while the meter is pulled and changed, no service interruption to the building. Many utilities mandate bypass at 320A class services. The U4419-X has lever bypass built in. If your utility does not require bypass, a non-bypass socket is the simpler order, but you cannot add a lever bypass to a socket that was not built with one.
5) Can I use this Milbank socket for an underground lateral, or is it overhead only?
Either. Cable entry is listed as overhead or underground, and it ships with a large closing plate over the hub opening, so you can leave the plate in place for an underground feed through the bottom or remove it and fit a hub for an overhead service drop.
6) Will a 5 terminal socket work for my 120/240V single phase service?
Yes. Five jaws is the standard configuration for a self-contained single-phase three-wire 120/240V service, the fifth terminal being the neutral. The U4419-X is a 1 phase, 60 Hz unit with one meter position. If you are metering a three-phase service you need a 7 jaw socket instead, not this one.
7) What wall space do I need to fit the Milbank U4419-X meter socket?
Plan for a footprint of 4.844 x 15 x 29 inches, with 29 inches of height and 15 inches of width on the wall and 4.844 inches of depth off the surface. Leave working clearance in front per your local code and utility rules on top of that.
8) What size lugs or terminals does the Milbank U4419-X use for line and load conductors?
The socket uses 3/8 inch stud terminals. On a 320A service that means you are landing large parallel or single conductors on studs rather than into screw-type lugs, so size your terminations and lug kits to suit a 3/8 inch stud.
9) Is a grounding strap included, or do I need to bond the neutral separately?
A bonded ground strap comes as part of the U4419-X, so the neutral-to-enclosure bond at the service point is provided. Internal insulation is glass polyester, which is what carries the jaw assembly at 600V.
10) What is the difference between a ringless meter socket and a ring-type one, and which does my utility want?
A ringless socket like the Milbank U4419-X uses a hinged or lift-off cover that the utility seals directly, with no separate sealing ring around the meter. Ring-type sockets clamp the meter in with a locking ring. The two are not interchangeable, and the choice is dictated by your utility's metering standard, not by preference. Confirm which style your serving utility accepts before ordering, because the wrong one will fail inspection at the meter set.
11) Can I use the Milbank U4419-X to meter more than one unit in a duplex or small apartment building?
No. It's a single position socket with one set of 5 jaws, so it meters one service only. For a duplex or multi-unit building you need a multi-position meter stack or one socket per tenant. The 320A rating applies to that single position.
12) What is the exact Milbank model and part number for this 320A lever bypass socket?
The model is Milbank U4419-X, a 5 terminal ringless socket with large closing plate and lever bypass, in the 5T32 product family. UNSPSC is 39121102 if you need it for a procurement system.
How fast can I get the Milbank U4419-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 U4419-X come with a warranty?
Absolutely. The Milbank U4419-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 U4419-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 U4419-X from ZenSupply?
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