Milbank 13 Terminal Ring Type ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4,543.55
Milbank UCSS3423-O 13 Terminal Ringless Plain Top Test Switch Provision Stainless Steel

Milbank 13 Terminal Ring Type Meter Socket 3 Phase 600V 20A Stainless Steel Underground Entry

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Model: UCSS3423-O

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

$4,543.55
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Milbank 13 Terminal Ring Type Meter Socket

Professional 3 Phase Metering Solution with Stainless Steel Construction

The Milbank 13 Terminal Ring Type Meter Socket delivers reliable 3 phase electrical metering with 600V AC rating and 20 continuous ampere capacity. Constructed from unpainted 304 stainless steel with Type 3R enclosure rating, this surface mount meter socket provides durable performance for underground cable entry applications with glass polyester insulation and ground lug equipment grounding.

Professional Features & Benefits

  • 20 Continuous Ampere Rating: Provides reliable current handling capacity for consistent metering performance in demanding applications.
  • 600V AC 3 Phase Configuration: Supports high voltage three phase systems with 60 Hz frequency rating for commercial and industrial installations.
  • 304 Stainless Steel Construction: Delivers superior corrosion resistance and long-term durability in harsh environmental conditions.
  • Type 3R Enclosure Rating: Ensures protection against rain, sleet, and ice formation for reliable outdoor operation.
  • 13 Terminal Configuration: Accommodates comprehensive metering connections with single mechanical terminals for secure wire termination.
  • Underground Cable Entry: Designed specifically for underground service applications with appropriate cable management provisions.
  • UL Listed Certification: Meets rigorous safety and performance 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: 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: Unpainted 304 Stainless Steel
  • Product Mounting: Surface Mount
  • Product Size: 5.125L x 12W x20H
  • Product Type: Ring Type Meter Socket
  • Standard: UL Listed;Type 3R
  • Terminal: Single Mechanical
  • Unspsc Number: 39121102
  • Voltage Rating: 600 Volts Alternating Current
  • Width: 12 IN

Professional Applications

  • Commercial Building Metering
  • Industrial Facility Power Monitoring
  • Multi-Tenant Properties
  • Underground Service Installations
  • Three Phase Distribution Systems
  • Professional Electrical Contracting
  • Utility Service Connections

Why Choose Milbank Quality?

Milbank delivers proven reliability with UL Listed certification and Type 3R environmental protection. The 304 stainless steel construction ensures long-term durability while glass polyester insulation provides dependable electrical performance for professional 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:
Ring Type Meter Socket
Standards:
UL Listed;Type 3R
Terminal:
Single Mechanical
Unspsc Number:
39121102
Voltage Rating:
600 Volts Alternating Current
Product Material:
Unpainted 304 Stainless Steel
Product Mounting:
Surface Mount
Amps:
20
Product Width:
12 IN
Department:
Electrical
Product Subgroup:
Electrical
Product Group:
Metering & Service Entrance

Milbank UCSS3423-O – Frequently Asked Questions

1) Will the Milbank UCSS3423-O 13 terminal meter socket work on an overhead service, or is it underground only?
Underground only. The UCSS3423-O is built for underground cable entry and comes with a plain top hub closing plate, so there is no hub opening for a service mast. If the service drops overhead, you need a socket with a hub top rather than this one.
2) Why is a 13 jaw meter socket only rated 20 amps when the service is far larger?
Because it is a CT rated socket, not a self contained one. The 13 terminal, 20 continuous ampere rating on the UCSS3423-O is the meter circuit rating, not the service size. Current transformers in a separate CT cabinet carry the load, and only the small metering conductors land here. That is also why the line and load side wire range is 12 to 10 AWG on both sides. Do not size this against your service amps.
3) What size wire lands in the Milbank UCSS3423-O meter socket terminals?
12 to 10 AWG on both line and load side, into single mechanical terminals. Those are metering leads coming from the CT cabinet, so pull your secondary leads in that range. Full size service conductors will not fit these lugs.
4) Does the Milbank UCSS3423-O include a bypass or a main breaker?
Neither. The UCSS3423-O has no bypass provision and no main breaker, and it carries a single meter position. If the utility requires a lever bypass for hot meter changes, this one will not satisfy that, and overcurrent protection has to be provided elsewhere in the service equipment.
5) Will a 13 jaw meter socket work on a 3 phase 4 wire 277/480V service?
Yes, within its rating. The socket is rated 600 volts AC, 3 phase, 60 hertz, and the 13 jaw arrangement is the standard CT metering configuration for 3 phase 4 wire service. A 277/480V system falls under the 600V rating. For single phase service you want a different jaw count.
6) Is the Milbank UCSS3423-O a ringless socket or a ring type socket?
The socket is ordered as 13 Terminal, Ringless in stainless steel under MPN UCSS3423-O. Utilities differ on this: some require ringless covers, some require ring type. Confirm which your serving utility accepts before the meter set, because the cover style is not field convertible.
7) How much wall space do I need for the Milbank 13 terminal stainless meter socket?
Lay out for 5.125L x 12W x 20H inches. It is a surface mount enclosure, so that footprint sits proud of the wall and the 5.125 inch dimension is your clearance off the finished surface. Leave working space in front per the usual clearance rules for the equipment.
8) Can this Milbank meter socket be mounted outdoors in a coastal or wash down area?
Yes. It is unpainted 304 stainless steel with a Type 3R enclosure rating, so it handles rain, sleet and ice and holds up better than painted steel in salt air, near pool chemicals, or in areas that get hosed down. Type 3R is a rain tight outdoor rating, not a wash down or submersion rating.
9) What else do I need to order to complete a CT metering install with this socket?
The socket is only one piece of the job. A CT rated 13 terminal socket needs a CT cabinet with the current transformers, the secondary metering conductors in 12 to 10 AWG, and the raceway between the cabinet and the socket. Since there is no bypass and no main breaker in this enclosure, disconnect and overcurrent protection are separate equipment. The meter itself is normally supplied by the utility.
10) How is the equipment ground made up in the Milbank stainless CT meter socket?
Through a ground lug provided in the enclosure. Bond the equipment grounding conductor to that lug, keeping to the 12 to 10 AWG terminal range for the metering conductors landing at the jaws. The stainless enclosure itself is not the bonding means.
11) Is the insulation in this Milbank meter socket rated for the 600V metering application?
The jaw insulation is glass polyester, matched to the 600 volt AC, 20 continuous ampere rating of the socket. Glass polyester holds dimensional stability and dielectric strength better than phenolic in outdoor temperature swings, which matters in a Type 3R enclosure that sees weather.
12) Can I standardize on the Milbank UCSS3423-O across multiple buildings for a spec submittal?
For 3 phase CT metered services with underground entry, yes. It is UL Listed, Type 3R, 600V AC, 3 phase, 60 hertz, one meter position, 13 terminal, in unpainted 304 stainless. UNSPSC 39121102 covers it for procurement coding. Buildings with overhead service or a utility that demands a bypass will need a different configuration.
How fast can I get the Milbank UCSS3423-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 UCSS3423-O come with a warranty?
Absolutely. The Milbank UCSS3423-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 UCSS3423-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 UCSS3423-O from ZenSupply?
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