Milbank 320A Single Position R...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,037.98
Milbank 4 Terminal Ringless Plain Top Lever Bypass Single Connector, 1 Position 320 Ampere

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

(No reviews yet) Write a Review

Model: U3000-O-K3L-K2L-ALT

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

$1,037.98
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

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

Professional electrical metering solution with lever bypass functionality

The Milbank 320A Single Position Ringless Meter Socket delivers reliable electrical metering with integrated lever bypass capability for professional installations. This 1 phase, 600V AC rated unit features G90 galvanized steel construction with powder coat finish and Type 3R enclosure rating for dependable outdoor service. The surface mount design with plain top configuration and single mechanical terminal system provides versatile installation options for residential and commercial applications.

Professional Features & Benefits

  • 320 Continuous Ampere Rating: Handles high-capacity electrical loads with reliable current carrying capacity for demanding applications.
  • Lever Bypass Provision: Enables safe meter maintenance and replacement without service interruption through integrated bypass functionality.
  • Type 3R Enclosure Rating: Weather-resistant construction protects internal components from rain, sleet, and ice formation in outdoor installations.
  • G90 Galvanized Steel with Powder Coat: Corrosion-resistant materials ensure long-term durability and professional appearance in harsh environments.
  • Single Position Design: Streamlined configuration reduces installation complexity while maintaining full metering functionality.
  • UL Listed Certification: Meets rigorous safety standards for reliable performance and code compliance in professional installations.
  • Ringless Configuration: Eliminates traditional meter rings for simplified meter installation and enhanced safety during service operations.

Technical Specifications

  • Amperage Rating: 320 Continuous Ampere
  • Application: Meter Socket
  • Barrel Lock Provision: 9/16 Inch Knockout and Angle Bracket for Barrel Lock Provision
  • Brand Name: Milbank
  • Bypass Provision: Lever Bypass
  • Departent: Electrical
  • Equipment Ground: 3 Barrel Ground Lug
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Plain Top
  • Insulation: Glass Polyester
  • Line Side Wire Range: 4 AWG - 600 kcmil or Two 1/0 AWG - 250 kcmil
  • Main Breaker Size: No Main Breaker
  • Number Of Main Breakers: 0
  • Number Of Meter Positions: 1 Position
  • Number Of Receptacles: 0
  • Phase: 1 Phase
  • Product Height: 30 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 x30H
  • Product Type: Ringless Meter Socket
  • Special Features: Alliant Energy
  • Standard: UL Listed;Type 3R
  • Terminal: Single Mechanical
  • Unspsc Number: 39121102
  • Voltage Rating: 600 Volts Alternating Current
  • Width: 15 IN

Professional Applications

  • Residential electrical service metering installations
  • Commercial building electrical distribution systems
  • Multi-unit residential properties and apartment complexes
  • Light industrial facilities requiring reliable metering
  • Utility company approved metering applications
  • Electrical contractor service and maintenance operations

Why Choose Milbank Quality?

Milbank meter sockets deliver proven reliability through UL Listed certification and Type 3R weather-resistant construction. The G90 galvanized steel with powder coat finish ensures long-term durability, while the comprehensive wire range compatibility and professional mounting system provide versatile installation options for demanding electrical applications.

Manufacturer Resources

Product Specs

Amperage Rating:
320 Continuous Ampere
Application:
Meter Socket
Brand Name:
Milbank
Bypass Provision:
Lever Bypass
Equipment Ground:
3 Barrel Ground Lug
Frequency Rating:
60 Hertz
Hub Closing Plate:
Plain Top
Insulation:
Glass Polyester
Line Side Wire Range:
4 AWG - 600 kcmil or Two 1/0 AWG - 250 kcmil
Main Breaker Size:
No Main Breaker
Number Of Main Breakers:
0
Number Of Meter Positions:
1 Position
Number Of Receptacles:
0
Phase:
1 Phase
Product Height:
30 IN
Product Length:
4.844 IN
Product Size:
4.844L x 15W x30H
Product Type:
Ringless Meter Socket
Special Features:
Alliant Energy
Standards:
UL Listed;Type 3R
Terminal:
Single Mechanical
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
Insulation Type:
Glass Polyester
Hub Style:
Plain Top
Installation Category:
Surface Mount
Terminal Type:
Single Mechanical
Number of Phases:
1
Product Details:
Ringless Meter Socket
Frequency:
60 hertz
Product Group:
Metering & Service Entrance

Milbank U3000-O-K3L-K2L-ALT – Frequently Asked Questions

1) Will a Milbank U3000-O meter socket handle a 320 amp / 400 amp class residential service?
The U3000-O is rated 320 continuous amperes at 600V AC, 60 Hz, single phase. That is the standard 320A continuous rating used for what utilities commonly call a 400A class single-phase service. It is a single meter position with no main breaker in the can, so the service disconnect and overcurrent protection have to be provided downstream in a separate enclosure or panel.
2) What size service entrance conductors will land in a Milbank U3000-O 320A meter socket?
Line side terminals take 4 AWG through 600 kcmil single, or two conductors from 1/0 AWG through 250 kcmil when you are paralleling. That two-conductor range is what matters on a 320A service run in parallel sets, which is common when 600 kcmil copper is impractical to bend into the can. Terminals are single mechanical type. Equipment ground is a 3 barrel ground lug.
3) Which Milbank U3000-O version do I order if my utility is Alliant Energy?
Two of the five configurations carry Alliant Energy approval: U3000-O-K3L-K2L-ALT, with a single connector locking 4-600 kcmil and a double connector locking 6-350 kcmil, and U3000-O-5T9-K3L-K2L-ALT, which adds the 5th terminal in the 9 o'clock position with single connector locking 6-350 kcmil and double connector locking 6-305 kcmil. If Alliant is the serving utility, order one of the ALT part numbers, not the plain utility version.
4) Do I need a 5th terminal meter socket, and does Milbank make the U3000-O that way?
Yes, if the utility requires a 5th jaw for network or 120/240V three-wire network metering, order U3000-O-5T9-K3L-K2L, which places the 5th terminal at the 9 o'clock position with a single connector locking 6-350 kcmil and a double connector locking 6-305 kcmil. The other configurations are 4 terminal. The 5th terminal position is a utility specification, not an installer preference, so get it off the service application before ordering.
5) Does the Milbank U3000-O come with a hub for overhead service, or do I need to add one?
It ships plain top. There is no factory hub opening, which suits underground lateral feeds where conductors enter from below. For an overhead drop with a mast you need a hub, so either add a closing plate hub sized to your conduit or specify a hub top socket instead. Decide this before the can goes on the wall.
6) What else do I need to order to finish a 320A service with a Milbank U3000-O meter socket?
The socket meters only. It contains no main breaker and no receptacles, so the job also needs the service disconnect and overcurrent device downstream, typically two 200A disconnects or a 400A class disconnect fed from the socket, plus a hub or closing plate if the service comes in overhead. Line side lugs already accept 4 AWG to 600 kcmil or two 1/0 AWG to 250 kcmil, and the 3 barrel ground lug handles the grounding electrode and equipment grounding terminations, so no add on lug kit is needed for those.
7) Will a Milbank U3000-O work on a three phase 208V or 480V commercial service?
No. The U3000-O is a 1 phase socket, 600V AC rated, with a 4 terminal jaw arrangement (5 terminal on the 5T9 configuration). It will not meter a three phase service regardless of voltage. For a three phase commercial service you need a three phase, 7 jaw or CT rated meter socket instead. The 600V rating is the insulation class of the enclosure, not permission to use it three phase.
8) What does lever bypass do on a 320A meter socket, and should I get bypass or non-bypass?
Lever bypass lets the meter be pulled and replaced without dropping power to the load, because a lever shunts current around the meter jaws first. On a 320A residential or small commercial service where the customer cannot lose power for a meter change, that is the reason to specify it. Non-bypass sockets are cheaper to install but every meter swap is an outage. Most utilities mandate bypass at 320A anyway, so check the utility's approved meter socket list before substituting a non-bypass can.
9) Can a ringless Milbank U3000-O be mounted outdoors on the side of a building?
Yes. Type 3R enclosure rating covers outdoor service against rain, sleet, and ice, and the body is G90 galvanized steel with a powder coat finish for corrosion resistance. It is a surface mount can, so it goes on the wall face rather than flush into it. Internal insulation is glass polyester. It is UL Listed.
10) What is the difference between the U3000-O-2/K3L-BL and the U3000-O-K3L-K2L?
Wire connectors. U3000-O-2/K3L-BL uses two single connectors, locking, rated 4-600 kcmil, with the 9/16 inch barrel lock provision. U3000-O-K3L-K2L pairs a single connector locking 4-600 kcmil with a double connector locking 6-350 kcmil, and is the utility version. Pick the double connector version if you are landing parallel conductors on a terminal; pick the two single connector version if each terminal takes one large conductor.
11) Can the utility seal and barrel lock a Milbank U3000-O ringless socket?
Yes. The socket includes a 9/16 inch knockout and an angle bracket for a barrel lock provision, which is what the serving utility uses to lock the cover after the meter is set. The ringless design means the cover itself is the securing element rather than a separate sealing ring, so the barrel lock is how it stays closed.
How fast can I get the Milbank U3000-O-K3L-K2L-ALT 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 U3000-O-K3L-K2L-ALT come with a warranty?
Absolutely. The Milbank U3000-O-K3L-K2L-ALT 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 U3000-O-K3L-K2L-ALT?
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 U3000-O-K3L-K2L-ALT from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!