Milbank Ring Type Meter Socket...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,293.41
Milbank U3320-R 6 Terminal Ring Type Large Hub Open Test Switch Provision 24in-42in-11in Painted Steel Single Front Lift Off Screw Cover Current Transformer Rack Provision

Milbank Ring Type Meter Socket 6 Terminal 20A 1 Phase 600V with Test Switch Provision

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Model: U3320-R

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

$2,293.41
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Milbank Ring Type Meter Socket 6 Terminal 20A 1 Phase 600V with Test Switch Provision

Professional single-position meter socket with test switch provision for reliable electrical service metering

The Milbank Ring Type Meter Socket delivers professional-grade electrical metering with 6 terminal configuration and 20 continuous ampere rating. This single-position, 1 phase unit operates at 600 volts AC and features G90 galvanized steel construction with powder coat finish for durability. The surface mount design includes large hub opening for overhead cable entry and ground lug for equipment grounding, making it ideal for residential and light commercial applications requiring reliable meter socket performance.

Professional Features & Benefits

  • 20 Continuous Ampere Rating: Provides reliable current handling capacity for residential and light commercial electrical service applications.
  • 6 Terminal Ring Type Design: Ensures secure electrical connections with single mechanical terminals for dependable meter interface.
  • 600V AC Operating Voltage: Supports standard electrical service voltages with 60 Hz frequency rating for versatile installation compatibility.
  • G90 Galvanized Steel Construction: Delivers long-lasting durability with powder coat finish and Type 3R rating for outdoor weather resistance.
  • Test Switch Provision: Enables safe meter testing and maintenance procedures without service interruption.
  • UL Listed Certification: Meets rigorous safety and performance standards for professional electrical installations.
  • Large Hub Opening Design: Accommodates overhead cable entry with proper wire range support for 14-10 AWG conductors.

Technical Specifications

  • Amperage Rating: 20 Continuous Ampere
  • Application: Meter Socket
  • Brand Name: Milbank
  • Bypass Provision: No Bypass
  • Cable Entry: Overhead
  • Departent: Electrical
  • Equipment Ground: Ground Lug
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Large Hub Opening
  • 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: 42.063 IN
  • Product Length: 11 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 11L x 24W x42.063H
  • 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 installations
  • Light commercial facility power monitoring
  • Multi-unit residential properties
  • Small office and retail establishments
  • Utility company meter interface applications
  • Electrical contractor service upgrades

Why Choose Milbank Quality?

Milbank delivers proven reliability with UL Listed certification and Type 3R weather-resistant rating. The G90 galvanized steel construction with powder coat finish ensures long-term durability in outdoor installations, while glass polyester insulation provides dependable electrical performance for professional electrical service applications.

Manufacturer Resources

Product Specs

Amperage Rating:
20 Continuous Ampere
Application:
Meter Socket
Brand Name:
Milbank
Bypass Provision:
No Bypass
Cable Entry:
Overhead
Equipment Ground:
Ground Lug
Frequency Rating:
60 Hertz
Hub Closing Plate:
Large Hub Opening
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:
42.063 IN
Product Length:
11 IN
Product Size:
11L x 24W x42.063H
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 U3320-R – Frequently Asked Questions

1) Is the Milbank U3320-R meter socket a 20 amp service socket, or is that rating for something else?
The 20 continuous ampere rating on the U3320-R is the socket's own current rating, which is why this is a transformer-rated enclosure rather than a self-contained service socket. The meter jaws see secondary current from current transformers, not the full service load. It carries no bypass provision and no main breaker, and both line and load side terminals are sized for 14-10 AWG conductors, which is instrument wiring, not service entrance cable. If you need a socket that carries the full 100A or 200A service current directly, this is the wrong type.
2) Can the Milbank U3320-R be mounted outdoors on a building exterior?
Yes. The U3320-R is Type 3R rated and UL Listed, so it is built for outdoor rain-tight service. The enclosure is G90 galvanized steel with a powder coat finish and mounts to the surface of a wall or structure. Cable entry is from overhead through a large hub opening, so plan the mast or conduit run to come in from above.
3) Will a 6 terminal ring type socket accept the meter my utility is supplying?
The U3320-R has 6 jaws and a ring type cover, which is the standard arrangement for a single phase transformer-rated meter. Utilities differ on whether they require ring or ringless enclosures, so confirm with the serving utility before ordering. A ringless meter will not seat correctly in a ring type socket, and the two are not interchangeable.
4) Is the U3320-R rated for a 480V commercial service?
Yes, it is rated to 600 volts AC at 60 hertz, which covers 120/240V, 277/480V and 600V single phase applications. Insulation is glass polyester. It is a single phase unit, so a three phase installation needs a different socket.
5) What size conductors terminate in this meter socket?
Both line and load side terminals take 14 to 10 AWG using single mechanical terminals. That range suits CT secondary leads and metering conductors. If you are trying to land service entrance cable in the 2/0 to 350 kcmil range, this cabinet will not accept it.
6) How much wall space do I need for the Milbank U3320-R meter socket enclosure?
Plan for a footprint of 11 x 24 x 42.063 inches, listed as 11 length, 24 width and 42.063 height. It is a tall, single-position cabinet, so verify vertical clearance for the meter height your utility requires plus room above for the overhead hub entry.
7) What does the test switch provision on the Milbank U3320-R actually give me?
Provision means the enclosure is prepared to accept a test switch, so a utility or meter tech can take readings and verify the metering without dropping service. The switch itself is a separate item; the socket gives you the space and mounting for it. Same idea applies to the current transformer rack provision the cabinet is built around.
8) Does the Milbank U3320-R include a disconnect or main breaker?
No. This socket has zero main breakers and no bypass provision, so it is metering only. Overcurrent protection and any service disconnect have to be provided in separate equipment downstream. There are also no receptacles in the enclosure.
9) Is there a place to land the equipment ground in the Milbank U3320-R?
A ground lug is factory supplied in the enclosure for equipment grounding. No separate grounding kit is needed for that connection.
10) What is the exact Milbank part number to order this meter socket by?
Order it as Milbank U3320-R. That is the single model for this 6 terminal ring type, single position, 600V transformer-rated socket cabinet with test switch provision.
How fast can I get the Milbank U3320-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 U3320-R come with a warranty?
Absolutely. The Milbank U3320-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 U3320-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
Why buy the Milbank U3320-R from ZenSupply?
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