Milbank 320A 3-Phase 7-Termina...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,823.71
Milbank U4342-R 7 Terminal Ringless Meter Socket Large Hub Open Lever Bypass

Milbank 320A 3-Phase 7-Terminal Ringless Meter Socket with Lever Bypass

(No reviews yet) Write a Review

Model: U4342-R-2/K6

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

$1,823.71
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 3-Phase 7-Terminal Ringless Meter Socket with Lever Bypass

Professional Power Metering Solution for Commercial & Industrial Applications

The Milbank 320A 3-Phase 7-Terminal Ringless Meter Socket delivers reliable power metering and distribution for demanding commercial and industrial installations. Featuring robust G90 galvanized steel construction with powder coat finish and Type 3R weatherproof rating, this professional-grade meter socket provides secure power measurement with convenient lever bypass functionality for maintenance operations.

Professional Features & Benefits

  • 320 Continuous Ampere Rating: Handles high-capacity electrical loads for commercial and industrial applications with reliable current-carrying capacity.
  • 3-Phase Configuration: Supports balanced three-phase power distribution for efficient operation of motors, HVAC systems, and industrial equipment.
  • 7-Terminal Design: Provides comprehensive metering connections for complex electrical configurations and utility requirements.
  • Lever Bypass Provision: Enables safe maintenance operations by allowing power bypass during meter servicing without service interruption.
  • Type 3R Weatherproof Rating: Protects internal components from rain, sleet, and ice damage for reliable outdoor installation performance.
  • G90 Galvanized Steel Construction: Delivers superior corrosion resistance and structural integrity with professional powder coat finish.
  • UL Listed Certification: Meets rigorous safety and performance standards for code compliance and professional installation confidence.

Technical Specifications

  • Amperage Rating: 320 Continuous Ampere
  • Application: Meter Socket
  • Barrel Lock Provision: 7/8 Inch Knockout and Angle Bracket For Barrel Lock Provision
  • Brand Name: Milbank
  • Bypass Provision: Lever Bypass
  • Cable Entry: Overhead or Underground
  • Departent: Electrical
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Large Hub Opening
  • Insulation: Glass Polyester
  • Load Side Wire Range: 6 AWG - 350 kcmil
  • Main Breaker Size: No Main Breaker
  • Number Of Jaws: 7 Terminal
  • Number Of Main Breakers: 0
  • Number Of Meter Positions: 1 Position
  • Number Of Receptacles: 0
  • Phase: 3 Phase
  • Product Family Code: 7T32
  • Product Height: 38.75 IN
  • Product Length: 6 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Type: Ringless Meter Socket
  • Special Features: American Electric Power
  • Standard: UL Listed;Type 3R
  • Unspsc Number: 39121102
  • Width: 17.75 IN

Professional Applications

  • Commercial Buildings and Office Complexes
  • Industrial Manufacturing Facilities
  • Multi-Unit Residential Properties
  • Retail and Shopping Centers
  • Healthcare and Educational Facilities
  • Municipal and Government Buildings
  • Data Centers and Telecommunications

Why Choose Milbank Quality?

Milbank delivers proven reliability with UL Listed certification and Type 3R weatherproof protection. The robust G90 galvanized steel construction with powder coat finish ensures long-term durability in demanding outdoor environments, while the comprehensive 7-terminal design and lever bypass provision provide the professional functionality required for critical power 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
Frequency Rating:
60 Hertz
Hub Closing Plate:
Large Hub Opening
Insulation:
Glass Polyester
Load Side Wire Range:
6 AWG - 350 kcmil
Main Breaker Size:
No Main Breaker
Number Of Jaws:
7 Terminal
Number Of Main Breakers:
0
Number Of Meter Positions:
1 Position
Number Of Receptacles:
0
Phase:
3 Phase
Product Family Code:
7T32
Product Height:
38.75 IN
Product Length:
6 IN
Product Type:
Ringless Meter Socket
Special Features:
American Electric Power
Standards:
UL Listed;Type 3R
Unspsc Number:
39121102
Product Material:
G90 Galvanized Steel with Powder Coat Finish
Product Mounting:
Surface Mount
Amps:
320
Product Width:
17.75 IN
Department:
Electrical
Product Subgroup:
Electrical
Insulation Type:
Glass Polyester
Hub Style:
Large Hub Opening
Installation Category:
Surface Mount
Number of Phases:
3
Product Details:
Ringless Meter Socket
Frequency:
60 hertz
Number of Terminations:
7

Milbank U4342-R-2/K6 – Frequently Asked Questions

1) Does the Milbank U4342-R meter socket include a main breaker?
No. The U4342-R is a meter socket only, with no main breaker and no receptacles. You'll need a separate service disconnect downstream to meet code. It carries one meter position with 7 jaws, rated 320 continuous amps at 60 Hz, three phase.
2) What wire size can I land in the Milbank 320A 7-terminal ringless socket?
Load side wire range is 6 AWG through 350 kcmil. The connector configuration varies by model: U4342-R-2/K6 has two double connectors rated 6-350 kcmil, while U4342-R-K7-K6 pairs a single connector rated 4 AWG to 600 kcmil with a double connector at 6-350 kcmil. Pick based on whether you're landing parallel conductors or one large feeder per phase.
3) Is a 7-terminal meter socket the right one for my service, or do I need 5-jaw?
Seven jaws is what utilities specify for 3-phase 4-wire metering, and that's what the U4342-R provides: 3 phase, 7 terminations, single meter position. If your service is single phase or 3-phase 3-wire, the utility will call for a different jaw count and this socket won't be accepted. Always confirm the jaw configuration against the serving utility's meter spec before ordering.
4) Can the Milbank U4342-R be mounted outdoors on an exterior wall?
Yes. Type 3R rated and UL Listed, so it's built for outdoor rain, sleet and ice exposure. The enclosure is G90 galvanized steel with a powder coat finish, and it's a surface mount unit, so it bolts flat to the wall or a meter pedestal backboard.
5) Which Milbank U4342-R version do I order if the utility requires a barrel lock?
Two of the four configurations include the barrel lock provision. U4342-R-K7-K6-BLG has the 7/8 inch barrel lock provision, and U4342-R-K7-K6-BLG-AEPU adds the bracket and is AEP approved. The plain U4342-R-2/K6 and U4342-R-K7-K6 do not include it, so if your utility mandates barrel lock sealing, order one of the BLG versions.
6) Is there an American Electric Power approved version of this Milbank meter socket?
Yes. U4342-R-K7-K6-BLG-AEPU is the AEP approved configuration, with the single 4-600 kcmil connector, double 6-350 kcmil connector, and 7/8 inch barrel lock with bracket provision. If you're working in AEP territory, that's the part number the utility will accept.
7) What are the dimensions of the Milbank U4342-R meter socket for wall layout?
The enclosure measures 38.75 inches by 17.75 inches by 6 inches deep. Allow for the hub opening at the top and conduit bends below when laying out the meter board.
8) Does this Milbank socket work for underground service, or only overhead?
Both. Cable entry is rated for overhead or underground feed. It comes with a large hub opening for overhead service masts; for an underground lateral you close off the hub and bring conduit in through the bottom.
9) What does the lever bypass on this meter socket do for maintenance?
The lever bypass lets a utility or qualified electrician shunt current around the meter so the meter can be pulled or changed without dropping the load. On a 320 amp commercial service feeding tenants or HVAC equipment, that's what keeps the building energized during a meter swap. Bypass operation is normally restricted to the serving utility.
10) What is ringless construction on a meter socket and does it change my install?
A ringless socket like the U4342-R uses a full-length cover that the meter sits behind, instead of a sealing ring around the meter rim. Utilities pick one style or the other, and they are not interchangeable in the field. Confirm your utility specifies ringless before ordering, because a ringless can will be rejected where a ring-type is required.
11) What insulating material separates the jaws in the Milbank 320A socket?
Glass polyester. That's the base material holding the 7 jaws, and it's what gives the socket its dielectric strength and heat resistance at sustained 320 amp loading.
How fast can I get the Milbank U4342-R-2/K6 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 U4342-R-2/K6 come with a warranty?
Absolutely. The Milbank U4342-R-2/K6 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 U4342-R-2/K6?
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 U4342-R-2/K6 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.
!