Milbank 8 Terminal Ringless Me...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,255.69
Milbank UC4965-O-WC-21-NST 8 Terminal Ringless Plain Top Test Switch Prewired Nstar Massachusetts

Milbank 8 Terminal Ringless Meter Socket 3 Phase 20A 600V with Plain Top Test Switch

(No reviews yet) Write a Review

Model: UC4965-O-WC-21-NST

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

$1,255.69
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Milbank 8 Terminal Ringless Meter Socket 3 Phase 20A 600V with Plain Top Test Switch

Professional 3-Phase Metering Solution with Test Switch Capability

The Milbank 8 Terminal Ringless Meter Socket delivers reliable 3-phase electrical metering for commercial and industrial applications. This surface-mounted unit features a robust G90 galvanized steel construction with powder coat finish, providing Type 3R protection for outdoor installations. The 20 continuous ampere rating at 600V AC supports demanding electrical loads while the plain top design with test switch functionality enables safe meter testing and maintenance operations.

Professional Features & Benefits

  • 20 Continuous Ampere Rating: Handles substantial electrical loads for commercial and light industrial applications with reliable current capacity.
  • 3 Phase 600V AC: Supports high-power three-phase electrical systems commonly found in commercial facilities and industrial operations.
  • 8 Terminal Configuration: Provides comprehensive connection points for complex metering installations with multiple circuit requirements.
  • G90 Galvanized Steel with Powder Coat: Delivers superior corrosion resistance and long-term durability in outdoor environments.
  • Type 3R Rating: Ensures reliable protection against rain, sleet, and ice damage for outdoor electrical installations.
  • Plain Top Test Switch: Enables safe meter testing and maintenance without service interruption or safety hazards.
  • UL Listed: Meets rigorous safety standards for professional electrical installations and code compliance.

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: 8 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

  • Commercial Building Electrical Metering
  • Industrial Facility Power Monitoring
  • Multi-Tenant Property Metering
  • Manufacturing Plant Electrical Distribution
  • Retail and Office Complex Installations
  • Municipal and Government Facilities
  • Educational Institution Power Systems

Why Choose Milbank Quality?

Milbank delivers proven reliability through UL Listed safety compliance and Type 3R environmental protection. The robust G90 galvanized steel construction with powder coat finish ensures long-term performance in demanding outdoor installations, while the glass polyester insulation provides superior electrical isolation for safe operation.

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:
8 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 UC4965-O-WC-21-NST – Frequently Asked Questions

1) Is the Milbank UC4965-O-WC-21-NST meter socket approved for NSTAR territory in Massachusetts?
This Milbank 8 terminal ringless socket is built to the NSTAR Massachusetts utility spec, which is why it carries the NST suffix on the model number UC4965-O-WC-21-NST. If your job is outside that utility's service area, check the serving utility's approved meter socket list before you buy, since sockets are approved utility by utility.
2) Why is this 3 phase 600V meter socket only rated 20 amps?
Because it is a CT-rated metering socket, not a self-contained service socket. The 20 continuous ampere rating is the current the socket itself carries from the instrument transformer secondaries, not the building load. The service current passes through separate current transformers in a CT cabinet, and only the low-current metering leads land here. That's also why the line and load side wire ranges are both 12 to 10 AWG, which is control-wire size, not service conductor size. If you need a socket that carries the full service current, you want a self-contained 100A, 200A or 320A socket instead.
3) Does this meter socket have a bypass or a main breaker in it?
No on both. The Milbank UC4965-O-WC-21-NST has no bypass provision and no main breaker, and there are no receptacles. Meter isolation is handled through the test switch instead, which is what lets a meter tech work safely without pulling the load. Overcurrent protection has to come from separate equipment ahead of or behind the metering.
4) Is the top of this Milbank socket drilled for a conduit hub?
No. It ships plain top, meaning the top of the can is solid with no hub opening. This one is configured for underground cable entry, so conduit comes in from below or through a knockout rather than an overhead hub. If you're feeding from an overhead service, you need a hub-top or ringless socket with a hub opening instead.
5) Will an 8 terminal socket accept a standard residential meter?
No. An 8 jaw socket takes an 8 jaw 3 phase meter, typically a transformer-rated form used for 3 phase, 60 Hz service at up to 600 volts. A residential 4 jaw single phase meter will not seat in it. Confirm the meter form your utility is setting, since the jaw count has to match.
6) What size wire lands in the terminals on this Milbank CT meter socket?
Both line side and load side terminals take 12 to 10 AWG, using single mechanical terminals. That's sized for CT secondary and voltage leads. Don't plan on landing service conductors here.
7) Can this Milbank ringless meter socket be mounted outdoors on an exterior wall?
Yes. It's a Type 3R enclosure, UL Listed, in G90 galvanized steel with a powder coat finish, so it handles rain, sleet and ice on an exterior wall. It is surface mount, so you're fastening the back of the can to the wall or to Unistrut, not recessing it into the wall.
8) How much wall space do I need for the Milbank UC4965 meter socket?
The enclosure measures 5.125 long x 12 wide x 20 high in inches. Lay out 12 by 20 inches of flat wall with about 5-1/8 inches of standoff depth, plus whatever working clearance your utility and the NEC require in front of the meter.
9) What does ringless mean on this Milbank meter socket, and does it change the cover I need?
Ringless means there's no sealing ring clamping the meter to the socket. The utility's lift-off cover holds the meter in place and gets sealed instead. Some utilities require ringless, some require ring-type, and they are not interchangeable in the field, so match whatever the serving utility specifies. This one is the ringless style.
10) Can I meter two tenants out of this Milbank socket?
No, it's a single meter position. One tenant, one meter. For a multi-tenant building you need a multi-position meter stack or one socket per tenant.
11) Is there a grounding provision inside this meter socket or do I add one?
A ground lug is provided in the enclosure for the equipment grounding conductor, so you don't need to add a separate lug kit. Internal insulation is glass polyester.
How fast can I get the Milbank UC4965-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 UC4965-O-WC-21-NST come with a warranty?
Absolutely. The Milbank UC4965-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 UC4965-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 UC4965-O-WC-21-NST from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!