Milbank 320A 3-Phase Ringless ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,112.23
Milbank U3936-R 7 Terminal Ringless Large Hub Open Lever Bypass Tall Shell

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

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Model: U3936-R

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

$1,112.23
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Milbank 320A 3-Phase Ringless Meter Socket with Lever Bypass - 7 Terminal Large Hub

Professional metering solution with integrated bypass functionality

The Milbank 320A 3-Phase Ringless Meter Socket delivers reliable electrical metering with convenient lever bypass operation for professional installations. Featuring a robust G90 galvanized steel construction with powder coat finish and Type 3R rating, this 7-terminal unit provides versatile overhead or underground cable entry options. The large hub opening and tall shell design accommodate various installation requirements while maintaining UL Listed safety standards.

Professional Features & Benefits

  • 320 Continuous Ampere Rating: Handles substantial electrical loads for commercial and industrial applications with reliable current capacity.
  • Lever Bypass Provision: Enables safe meter maintenance and replacement without interrupting power service to critical loads.
  • 7 Terminal Configuration: Provides comprehensive connection points for complex 3-phase electrical systems and metering requirements.
  • Type 3R Enclosure Rating: Weather-resistant construction protects internal components from rain, sleet, and ice formation in outdoor installations.
  • G90 Galvanized Steel Construction: Durable material with powder coat finish ensures long-term corrosion resistance and structural integrity.
  • Large Hub Opening Design: Accommodates various cable sizes and entry methods for flexible installation configurations.
  • UL Listed Certification: Meets rigorous safety standards for reliable operation in commercial and industrial electrical systems.

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: Grounding Stud
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Large Hub Opening
  • Insulation: Glass Polyester
  • 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: 4.844 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 4.844L x 13W x38.75H
  • 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: 13 IN

Professional Applications

  • Commercial Building Electrical Services
  • Industrial Facility Power Distribution
  • Multi-Tenant Properties
  • Manufacturing Plants
  • Retail and Office Buildings
  • Municipal and Government Facilities
  • Educational Institutions

Why Choose Milbank Quality?

Milbank delivers proven reliability with UL Listed certification and Type 3R weather protection. The durable G90 galvanized steel construction with powder coat finish ensures long-term performance in demanding electrical applications, while the comprehensive 7-terminal design and lever bypass functionality provide professional-grade metering solutions for critical power systems.

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:
Grounding Stud
Frequency Rating:
60 Hertz
Hub Closing Plate:
Large Hub Opening
Insulation:
Glass Polyester
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:
4.844 IN
Product Size:
4.844L x 13W x38.75H
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:
13 IN
Department:
Electrical
Product Subgroup:
Electrical
Product Group:
Metering & Service Entrance

Milbank U3936-R – Frequently Asked Questions

1) Does the Milbank U3936-R meter socket have a main breaker, or do I need a separate disconnect?
No main breaker. The U3936-R is a meter socket only, with one meter position and zero main breakers, so the service disconnect has to be provided separately downstream. It also has no receptacles. If you need metering and the main disconnect in one enclosure, this is not the unit for that job.
2) Is a 7 terminal meter socket right for a 3-phase 4-wire service?
Yes. The U3936-R is built with 7 jaws for 3-phase metering, rated 600 volts AC at 60 hertz and 320 continuous amps. Seven-jaw sockets are the standard configuration for 3-phase, 4-wire network and wye services. A single-phase service uses a 4-jaw or 5-jaw socket instead, so confirm the utility's meter form before ordering this one.
3) Can this Milbank meter socket be mounted outdoors on an exterior wall?
Yes. The U3936-R carries a Type 3R enclosure rating and is UL Listed, so it is suited to outdoor service entrance work where rain, sleet and ice are the exposure. The shell is G90 galvanized steel with a powder coat finish, and it is a surface mount unit, so it bolts flat to the wall or a structural backing.
4) What does lever bypass do on a meter socket, and do I need it?
Lever bypass lets a utility or electrician shunt the meter jaws so the meter can be pulled and replaced without dropping power to the load. On the U3936-R it is a lever-operated bypass built into the socket. Many utilities require bypass on 320 amp class services and on any account that cannot tolerate an outage for a meter change. If your utility does not require it, a non-bypass socket of the same jaw count is the simpler option.
5) Can I bring service conductors into this socket from underground, or is it overhead only?
Either one. The U3936-R accepts overhead or underground cable entry, and it ships with a large hub opening at the top for an overhead weatherhead run. For an underground lateral you close off the hub and land conductors through the bottom. That flexibility is what makes the same socket usable on a pole-fed building and a pad-fed one.
6) What size lugs or terminals does the Milbank U3936-R use for landing conductors?
Line and load connections are made to 3/8 inch studs, and there is a separate grounding stud for the equipment ground. Stud-type terminals mean you are landing lugged conductors or compression terminals rather than setscrew box lugs, so size your terminations for a 3/8 inch bolt hole before the crew shows up.
7) How much wall space do I need for the Milbank U3936-R meter socket?
Plan for a footprint of 4.844 x 13 x 38.75 inches, with 38.75 inches being the height of the tall shell and 13 inches the width. The 4.844 inch dimension is the depth off the wall. That tall shell is the reason to check clearances above and below the meter before you commit to a location, particularly under a soffit or over a foundation step.
8) What is the difference between a ringless meter socket and a ring type one?
A ringless socket like the U3936-R uses a sealable cover that slides down over the meter instead of a locking ring clamping the meter to the socket rim. Utilities specify one or the other and they are not interchangeable, so the choice is dictated by your serving utility, not by preference. Check the utility's service handbook before you buy either style.
9) Is 320 amps the same as a 400 amp service?
The U3936-R is rated 320 continuous amperes, which is the standard continuous rating for what the trade calls a 400 amp class residential or light commercial service (400 amps at 80 percent). If your drawing calls for a true 400 amp continuous socket, this is not that device. For most 400 amp class services fed with a 400 amp utility drop, a 320 continuous socket is what the utility expects.
10) Will the Milbank U3936-R work on a 480 volt 3-phase system?
The voltage rating is 600 volts AC, which covers 480Y/277 and 208Y/120 three-phase services as well as lower voltages, at 60 hertz. What actually decides the fit is the meter form your utility requires for that service, since the socket is wired for 7-jaw 3-phase metering.
11) I am standardizing meter sockets across a multi-tenant property. What identifies this exact Milbank unit?
Order by Milbank model U3936-R, product family code 7T32. That designation covers the 7 terminal ringless large hub, lever bypass, tall shell configuration at 320 continuous amps. The UNSPSC for procurement systems is 39121102. Specifying the model number is the only reliable way to get the same jaw count, bypass style and hub opening across every position on the property.
12) What insulating material is used inside this Milbank meter socket?
The jaw and terminal insulation is glass polyester, a thermoset that holds dielectric strength and dimensional stability under the heat a 320 amp connection puts on it. Combined with the galvanized steel shell and powder coat, it is built for long-term outdoor service rather than a temporary set.
How fast can I get the Milbank U3936-R 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 U3936-R come with a warranty?
Absolutely. The Milbank U3936-R 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 U3936-R?
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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