Milbank 3-Phase Ringless Meter...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,257.94
Milbank UC4966-O-WC-21-NST G90 Galvanized Steel 13 Terminal Ringless Meter Socket, Type 3R, Plain Top, Nstar Massachusetts

Milbank 3-Phase Ringless Meter Socket 20A 600V G90 Galvanized Steel Type 3R Underground Entry

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Model: UC4966-O-WC-21-NST

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

$2,257.94
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Milbank 3-Phase Ringless Meter Socket 20A 600V G90 Galvanized Steel Type 3R Underground Entry

Professional 3-Phase Metering Solution for Underground Service Applications

The Milbank 3-Phase Ringless Meter Socket delivers reliable electrical metering with 20 continuous ampere rating and 600V AC capacity. Constructed from G90 galvanized steel with powder coat finish, this Type 3R enclosure provides weather-resistant protection for surface mount installations. Features 13 terminal configuration with single mechanical terminals and glass polyester insulation for professional underground cable entry applications.

Professional Features & Benefits

  • 20 Continuous Ampere Rating: Provides reliable current handling capacity for residential and light commercial 3-phase metering applications.
  • 600V AC 3-Phase Configuration: Supports standard voltage requirements with professional 13-terminal design for comprehensive electrical connections.
  • G90 Galvanized Steel Construction: Delivers superior corrosion resistance and structural durability with powder coat finish for extended service life.
  • Type 3R Weather Protection: Ensures reliable operation in outdoor environments with protection against rain, sleet, and ice formation.
  • Underground Cable Entry: Designed specifically for underground service applications with appropriate cable entry provisions and plain top configuration.
  • UL Listed Compliance: Meets rigorous safety and performance standards for professional electrical installations and code compliance.
  • Single Position Design: Optimized for single meter installations with efficient space utilization and straightforward connection procedures.

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: 12 - 10 AWG
  • Load Side Wire Range: 12 - 10 AWG
  • Main Breaker Size: No Main Breaker
  • Number Of Jaws: 13 Terminal
  • Number Of Main Breakers: 0
  • Number Of Meter Positions: 1 Position
  • Number Of Receptacles: 0
  • Phase: 3 Phase
  • Product Family Code: CT20
  • Product Height: 20 IN
  • Product Length: 5.125 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 5.125L x 12W x20H
  • Product Type: Ringless Meter Socket
  • Special Features: Nstar Massachusetts
  • Standard: UL Listed;Type 3R
  • Terminal: Single Mechanical
  • Unspsc Number: 39121102
  • Voltage Rating: 600 Volts Alternating Current
  • Width: 12 IN

Professional Applications

  • Residential 3-Phase Service Metering
  • Light Commercial Facilities
  • Multi-Unit Properties
  • Professional Offices
  • Small Industrial Applications
  • Underground Service Installations
  • Massachusetts Utility Compliance Projects

Why Choose Milbank Quality?

Milbank delivers proven reliability with UL Listed compliance and Type 3R weather protection. The G90 galvanized steel construction with powder coat finish ensures long-term durability in demanding outdoor environments, while the professional 13-terminal configuration provides comprehensive connectivity for 3-phase metering applications.

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:
12 - 10 AWG
Load Side Wire Range:
12 - 10 AWG
Main Breaker Size:
No Main Breaker
Number Of Jaws:
13 Terminal
Number Of Main Breakers:
0
Number Of Meter Positions:
1 Position
Number Of Receptacles:
0
Phase:
3 Phase
Product Family Code:
CT20
Product Height:
20 IN
Product Length:
5.125 IN
Product Size:
5.125L x 12W x20H
Product Type:
Ringless Meter Socket
Special Features:
Nstar Massachusetts
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:
12 IN
Department:
Electrical
Product Subgroup:
Electrical
Product Group:
Metering & Service Entrance

Milbank UC4966-O-WC-21-NST – Frequently Asked Questions

1) Will the Milbank UC4966 meter socket work for an NSTAR service in Massachusetts?
The UC4966-O-WC-21-NST is built to the NSTAR Massachusetts utility specification, which is why it carries the NST suffix in the model number. If your utility spec sheet calls for a different POCO approval, this is not the socket to order, since utility-approved sockets are not interchangeable between territories.
2) Is this a CT-rated meter socket or a self-contained one? What does 20 amps mean on a 13-terminal socket?
This is the transformer-rated (CT) type. The 13 terminal jaw configuration is the instrument-transformer arrangement used for 3-phase CT metering, and the 20 continuous ampere rating is the socket's own instrument-circuit rating, not the size of the service being metered. The actual service current is handled by separate current transformers ahead of the socket. If you need a socket that carries the full load current directly, you want a self-contained 100A, 200A or 320A meter socket instead.
3) What size wire can I land in the Milbank UC4966 CT meter socket?
Both line side and load side terminals take 12 to 10 AWG, on single mechanical lugs. That range is what you would expect on a CT cabinet, where the conductors coming into the socket are instrument leads from the current transformers rather than service conductors. There is also a ground lug for the equipment ground.
4) Does this Milbank socket come with a hub for overhead service conductors?
No. It ships with a plain top and is configured for underground cable entry, so there is no factory hub opening for an overhead mast. For an overhead drop you need a socket with a hub opening or a hub closing plate provision, not this one.
5) Does the Milbank UC4966 have a meter bypass, or do I need to pull the meter to work on the load side?
There is no bypass provision on this socket. Power cannot be maintained through it while the meter is out, so any work that requires the meter removed means an outage on that service. Utilities that require a lever or horn bypass on CT installations will call it out on their spec sheet, and this model does not satisfy that.
6) Is there a main breaker or disconnect built into this meter socket?
None. The UC4966 is a meter socket only, with zero main breakers and no receptacles, so the service disconnect has to be provided separately downstream or ahead of it per your local requirements. If you want metering and the main in one can, you need a meter-main combination unit rather than a straight socket.
7) Can this meter socket be mounted outdoors on the side of a building?
Yes. The enclosure is Type 3R and UL Listed, so it is rated for outdoor use against rain, sleet and ice. The shell is G90 galvanized steel with a powder coat finish, which is the usual construction for exterior service equipment exposed to weather.
8) What voltage service can a 13-terminal Milbank CT socket be used on?
It is rated 600 volts AC at 60 hertz, which covers the common 3-phase services a contractor meets in the field, including 120/208V wye, 277/480V wye and 480V delta. The internal insulation is glass polyester. Note that the voltage rating is a ceiling, not a requirement, so confirm the utility wants this exact socket for the service class you are metering.
9) What does ringless mean on a meter socket, and does it change how the cover comes off?
Ringless means there is no separate sealing ring clamping the meter to the socket. The cover itself retains the meter, and you take the cover off to get at the meter and the terminals. Utilities specify ringless or ring-type by territory and they are not interchangeable, so match whichever your POCO requires. This Milbank unit is the ringless style.
10) How many meters can this Milbank socket serve? Can I use it for a multi-tenant building?
One meter only. It is a single position socket, so each metered tenant needs their own. For a multi-unit property with several tenants on one service, you want a multi-position meter stack or a gang socket rather than individual single-position cans.
How fast can I get the Milbank UC4966-O-WC-21-NST 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 UC4966-O-WC-21-NST come with a warranty?
Absolutely. The Milbank UC4966-O-WC-21-NST 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 UC4966-O-WC-21-NST?
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 UC4966-O-WC-21-NST from ZenSupply?
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