Milbank Ring Type Meter Socket...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,585.64
Milbank U3340-O 6 Terminal Ring Type Plain Top Test Switch Provision 24in-52in-11in Painted Steel Single Front Lift Off Screw Cover Current Transformer Rack Provision

Milbank Ring Type Meter Socket 20A 600V 1-Phase with Test Switch Provision and Current Transformer Rack

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Model: U3340-O

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

$2,585.64
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Milbank Ring Type Meter Socket 20A 600V 1-Phase with Test Switch Provision and Current Transformer Rack

Professional metering solution with test switch and CT rack provisions

The Milbank Ring Type Meter Socket delivers reliable single-phase electrical metering with 20 continuous ampere rating and 600V AC capacity. This surface-mount unit features G90 galvanized steel construction with powder coat finish, Type 3R enclosure rating for outdoor applications, and UL listing for professional installations. The 6-terminal ring type design includes test switch provision and current transformer rack provision for enhanced monitoring capabilities.

Professional Features & Benefits

  • 20 Continuous Ampere Rating: Provides reliable current handling capacity for residential and light commercial metering applications
  • 600V AC 1-Phase Design: Compatible with standard single-phase electrical systems for versatile installation options
  • G90 Galvanized Steel with Powder Coat: Delivers superior corrosion resistance and long-lasting durability in outdoor environments
  • Type 3R Enclosure Rating: Ensures protection against rain, sleet, and ice formation for reliable outdoor operation
  • Test Switch Provision: Enables safe meter testing and maintenance without service interruption
  • Current Transformer Rack Provision: Supports advanced metering and monitoring system integration
  • UL Listed Certification: Meets rigorous safety standards for professional electrical installations

Technical Specifications

  • Amperage Rating: 20 Continuous Ampere
  • Application: Meter Socket
  • Brand Name: Milbank
  • Bypass Provision: No Bypass
  • Cable Entry: Underground
  • Departent: Electrical
  • Equipment Ground: Ground Lug
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Plain Top
  • Insulation: Glass Polyester
  • Line Side Wire Range: 14 - 10 AWG
  • Load Side Wire Range: 14 - 10 AWG
  • Main Breaker Size: No Main Breaker
  • Number Of Jaws: 6 Terminal
  • Number Of Main Breakers: 0
  • Number Of Meter Positions: 1 Position
  • Number Of Receptacles: 0
  • Phase: 1 Phase
  • Product Family Code: TRNS
  • Product Height: 52.063 IN
  • Product Length: 11 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 11L x 24W x52.063H
  • Product Type: Ring Type Meter Socket
  • Standard: UL Listed;Type 3R
  • Terminal: Single Mechanical
  • Unspsc Number: 39121102
  • Voltage Rating: 600 Volts Alternating Current
  • Width: 24 IN

Professional Applications

  • Residential electrical service metering
  • Small commercial facility power monitoring
  • Multi-unit residential properties
  • Professional office buildings
  • Retail establishments
  • Light industrial facilities
  • Utility service connections

Why Choose Milbank Quality?

Milbank delivers proven reliability with UL listed certification and Type 3R enclosure protection. The G90 galvanized steel construction with powder coat finish ensures long-term durability in demanding outdoor environments, while the professional 6-terminal ring type design provides secure connections for dependable electrical metering service.

Manufacturer Resources

Product Specs

Amperage Rating:
20 Continuous Ampere
Application:
Meter Socket
Brand Name:
Milbank
Bypass Provision:
No Bypass
Cable Entry:
Underground
Equipment Ground:
Ground Lug
Frequency Rating:
60 Hertz
Hub Closing Plate:
Plain Top
Insulation:
Glass Polyester
Line Side Wire Range:
14 - 10 AWG
Load Side Wire Range:
14 - 10 AWG
Main Breaker Size:
No Main Breaker
Number Of Jaws:
6 Terminal
Number Of Main Breakers:
0
Number Of Meter Positions:
1 Position
Number Of Receptacles:
0
Phase:
1 Phase
Product Family Code:
TRNS
Product Height:
52.063 IN
Product Length:
11 IN
Product Size:
11L x 24W x52.063H
Product Type:
Ring Type Meter Socket
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:
20
Product Width:
24 IN
Department:
Electrical
Product Subgroup:
Metering & Meter Sockets
Product Group:
Power Distribution

Milbank U3340-O – Frequently Asked Questions

1) Will the Milbank U3340-O meter socket work for a CT metering installation?
That's exactly what the U3340-O is built for. It's a 20 continuous amp, 600VAC single-phase ring type socket with a current transformer rack provision and a test switch provision inside the enclosure. The 20 amp rating is the instrument-rated meter circuit, not the service load, so the actual service current is carried by the CTs mounted on the rack and only the metering current passes through the socket jaws. If you're looking for a self-contained socket that carries full service amperage through the jaws, this isn't it.
2) What size wire can I land in the Milbank U3340-O meter socket?
Both line and load terminals take 14 to 10 AWG, with single mechanical terminals. That's small conductor territory, consistent with a CT-rated socket where only the metering circuit conductors land here. If you're trying to terminate service-size copper or aluminum, this socket won't accept it.
3) Can the Milbank U3340-O ring type meter socket be installed outdoors?
Type 3R rated and UL Listed, so yes, outdoor wall mounting is what it's made for. The enclosure is G90 galvanized steel with a powder coat finish. Type 3R covers falling rain, sleet and ice formation. It is not a washdown or dust-tight rating, so for an interior process area or a location subject to hosedown you want a higher enclosure type.
4) Does the Milbank U3340-O meter socket have a bypass or a main breaker?
Neither. The U3340-O is a no-bypass socket with no main breaker and no breaker positions. If your utility requires a lever or horn bypass so the meter can be pulled without dropping the service, this socket won't satisfy that, and if you need overcurrent protection at the metering point you'll be adding a separate disconnect. What it does have for maintenance is the test switch provision, which is how a CT installation is normally tested rather than by bypassing.
5) Does the Milbank U3340-O meter socket come with a hub for overhead service entrance?
Plain top, with no hub opening, and the cable entry is underground. For an overhead drop you'd need a hub closing plate arrangement or a different socket configured for overhead entry, so if the service is coming in from a weatherhead this is the wrong top. Underground lateral feeds are what it's set up for.
6) Do the current transformers and test switch come with the Milbank U3340-O socket?
No. The socket is supplied with a rack provision and a test switch provision, meaning the mounting and space are there but the CTs and the test switch itself are separate items, typically supplied or specified by the serving utility to match the service size. Order the cabinet knowing you'll be adding those before the installation is complete.
7) What Milbank part number do I order for a single phase 6 terminal CT cabinet with a test switch?
Milbank U3340-O. That's the manufacturer part number for the ring type, plain top, 6 terminal single phase CT rack socket with test switch provision in a Type 3R enclosure.
How fast can I get the Milbank U3340-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 U3340-O come with a warranty?
Absolutely. The Milbank U3340-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 U3340-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 U3340-O from ZenSupply?
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