Milbank 200A 1-Phase Ringless ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$318.26
Milbank U3940-O 4 Terminal Ringless Plain Top Georgia Rec

Milbank 200A 1-Phase Ringless Meter Socket with Underground Entry and Plain Top

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Model: U3940-O

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

$318.26
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Milbank 200A 1-Phase Ringless Meter Socket with Underground Entry and Plain Top

Professional metering solution for residential and commercial electrical service

The Milbank 200A 1-Phase Ringless Meter Socket delivers reliable electrical metering with underground cable entry and side wireway configuration. Built with G90 galvanized steel construction and powder coat finish, this UL Listed Type 3R enclosure provides durable outdoor performance for single-phase 600V AC applications with 4-terminal lay-in connections.

Professional Features & Benefits

  • 200 Continuous Ampere Rating: Handles substantial electrical loads for residential and light commercial applications with reliable current capacity.
  • 1-Phase 600V AC Configuration: Compatible with standard single-phase electrical service installations up to 600 volts alternating current.
  • G90 Galvanized Steel with Powder Coat: Provides superior corrosion resistance and long-lasting durability in outdoor environments.
  • UL Listed Type 3R Enclosure: Meets rigorous safety standards and offers protection against rain, sleet, and ice formation.
  • Underground Cable Entry with Side Wireway: Facilitates clean underground service connections with convenient side access for wire management.
  • 4-Terminal Lay-in Design: Simplifies installation with accessible terminal connections accommodating 6 AWG to 350 kcmil wire range.
  • Ringless Plain Top Configuration: Streamlined design eliminates hub requirements while maintaining professional appearance and functionality.

Technical Specifications

  • Amperage Rating: 200 Continuous Ampere
  • Application: Meter Socket
  • Brand Name: Milbank
  • Bypass Provision: No Bypass
  • Cable Entry: Underground with Side Wireway
  • Departent: Electrical
  • Equipment Ground: Ground Lug
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Plain Top
  • Insulation: Glass Polyester
  • Line Side Wire Range: 6 AWG - 350 kcmil
  • Load Side Wire Range: 6 AWG - 350 kcmil
  • 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: 4T20
  • Product Height: 15.25 IN
  • Product Length: 4.5 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 4.5L x 13W x15.25H
  • Product Type: Ringless Meter Socket
  • Standard: UL Listed;Type 3R
  • Terminal: Lay in
  • Unspsc Number: 39121102
  • Voltage Rating: 600 Volts Alternating Current
  • Width: 13 IN

Professional Applications

  • Residential electrical service metering installations
  • Small commercial and retail facility power metering
  • Multi-unit residential properties requiring individual metering
  • Underground electrical service connections
  • Replacement and upgrade projects for existing meter socket installations
  • New construction electrical service installations

Why Choose Milbank Quality?

Milbank meter sockets provide dependable electrical metering solutions backed by UL Listed safety certification and Type 3R environmental protection. The G90 galvanized steel construction with powder coat finish ensures long-term durability and corrosion resistance, while the glass polyester insulation and ground lug equipment grounding deliver reliable electrical performance for professional installations.

Manufacturer Resources

Product Specs

Amperage Rating:
200 Continuous Ampere
Application:
Meter Socket
Brand Name:
Milbank
Bypass Provision:
No Bypass
Cable Entry:
Underground with Side Wireway
Equipment Ground:
Ground Lug
Frequency Rating:
60 Hertz
Hub Closing Plate:
Plain Top
Insulation:
Glass Polyester
Line Side Wire Range:
6 AWG - 350 kcmil
Load Side Wire Range:
6 AWG - 350 kcmil
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:
4T20
Product Height:
15.25 IN
Product Length:
4.5 IN
Product Size:
4.5L x 13W x15.25H
Product Type:
Ringless Meter Socket
Standards:
UL Listed;Type 3R
Terminal:
Lay in
Unspsc Number:
39121102
Voltage Rating:
600 Volts Alternating Current
Product Material:
G90 Galvanized Steel with Powder Coat Finish
Product Mounting:
Surface Mount
Amps:
200
Product Width:
13 IN
Department:
Electrical
Product Subgroup:
Metering & Meter Sockets
Product Group:
Power Distribution

Milbank U3940-O – Frequently Asked Questions

1) Will the Milbank U3940-O meter socket work for a 200A underground residential service?
That's exactly what the U3940-O is built for. It's a single-position, 1-phase ringless socket rated 200 continuous amps at 600V AC, 60 Hz, with underground cable entry through a side wireway. The 4-terminal jaw configuration is the standard single-phase residential/light commercial meter arrangement. Note there is no main breaker and no bypass, so it is a meter socket only, not a combination meter-main.
2) What size service conductors will fit the lugs on this Milbank 200A socket?
Both line and load terminals take 6 AWG through 350 kcmil, and they're lay-in style, so you drop the conductor in rather than threading it through a closed lug. That range covers typical 200A copper and aluminum service entrance sizes. There is also a ground lug for the equipment grounding conductor.
3) Can I use this socket for an overhead service drop instead of underground?
No. The U3940-O is configured for underground entry with a side wireway and ships with a plain top, meaning no hub and no provision for a service mast or weatherhead conduit at the top. For an overhead drop you need a hub-type or hub-provision ringless socket instead.
4) Does this Milbank socket include a bypass so the meter can be pulled without dropping power?
No bypass on this one. The U3940-O is specified as no bypass, so power is interrupted when the meter is removed. If your utility requires a lever or horn bypass for maintenance, you need a bypass-equipped socket instead.
5) Do I still need a separate main breaker panel with this meter socket?
Yes. With zero main breakers and no receptacles, the U3940-O only holds the meter and the line and load terminations. Your service disconnect and distribution have to be a separate load center or disconnect downstream of the socket.
6) Is this meter socket rated for outdoor wall mounting in the weather?
Yes. It's a UL Listed Type 3R enclosure, which is the rain, sleet and ice-protected rating used for exterior service equipment, and it surface mounts to the wall. The shell is G90 galvanized steel with a powder coat finish for corrosion resistance, and the jaw assembly is insulated with glass polyester.
7) How much wall space do I need for the Milbank U3940-O, and will it fit where my old socket was?
The enclosure measures 4.5L x 13W x 15.25H inches, so plan on roughly a 13 by 15-1/4 inch footprint with 4-1/2 inches of projection off the wall. Compare that against the existing backplate and conduit locations before you demo the old can; the underground entry means your service conduit has to come up into the side wireway rather than the top.
8) Does a ringless meter socket need a sealing ring, or is the cover different?
Ringless means no separate locking ring. The utility's socket cover slides over the lip of the can and is secured and sealed directly, so there is no ring to order with it. Many utilities specify ringless by default, so verify which style your serving utility accepts before you set the U3940-O.
9) Can one U3940-O serve two apartments or two tenants?
No. It's a single meter position with one 4-terminal jaw set, so it meters one service only. Multi-unit buildings need either one socket per unit or a multi-position meter stack.
10) Will a 4-terminal socket work on a 3-phase service?
No. Four jaws is the single-phase, 3-wire arrangement, and this socket is rated 1 phase. A 3-phase 4-wire service requires a 7-jaw socket. Use the U3940-O only on 120/240V or other single-phase services up to 600V AC.
11) What is the Milbank part number and family code for this 200A ringless underground socket?
Order it as Milbank U3940-O. It falls under Milbank's 4T20 product family code, which denotes the 4-terminal 200-amp group, useful when you're matching a utility-approved socket list by family rather than by individual catalog number.
How fast can I get the Milbank U3940-O 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 U3940-O come with a warranty?
Absolutely. The Milbank U3940-O 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 U3940-O?
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 U3940-O from ZenSupply?
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