Milbank 150 Ampere 3-Position ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,186.26
Milbank 4 Terminal Ringless Large Closing Plate 3 Position, 150 Ampere

Milbank 150 Ampere 3-Position Ringless Meter Socket with Large Closing Plate

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Model: U1233-X-HSP

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

$1,186.26
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Milbank 150 Ampere 3-Position Ringless Meter Socket with Large Closing Plate

Professional electrical metering solution for multi-unit applications

The Milbank 150 Ampere 3-Position Ringless Meter Socket delivers reliable electrical metering for commercial and multi-unit residential applications. Constructed with G90 galvanized steel and powder coat finish for durability, this UL Listed Type 3R enclosure provides 300 Volts AC service with glass polyester insulation and ground lug equipment grounding. The surface mount design accommodates overhead or underground cable entry with flexible wire range compatibility.

Professional Features & Benefits

  • 150 Continuous Ampere Rating: Provides robust electrical capacity for demanding commercial and multi-unit applications with reliable continuous service.
  • 3-Position Configuration: Accommodates multiple meter installations in a single enclosure, optimizing space utilization and installation efficiency.
  • Ringless Design: Eliminates the need for meter rings, simplifying installation and reducing potential connection points for enhanced reliability.
  • Type 3R Enclosure: Weather-resistant construction protects against rain, sleet, and ice formation for dependable outdoor performance.
  • G90 Galvanized Steel Construction: Superior corrosion resistance with powder coat finish ensures long-term durability in harsh environmental conditions.
  • Flexible Wire Range Compatibility: Line side accepts 4 AWG - 600 kcmil or dual 1/0 AWG - 250 kcmil, load side handles 6 AWG - 350 kcmil for versatile installation options.
  • UL Listed Certification: Meets rigorous safety and performance standards for professional electrical installations and code compliance.

Technical Specifications

  • Amperage Rating: 150 Continuous Ampere
  • Application: Meter Socket
  • Brand Name: Milbank
  • Bypass Provision: No Bypass
  • Cable Entry: Overhead or Underground
  • Departent: Electrical
  • Equipment Ground: Ground Lug
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Large Closing Plate
  • Insulation: Glass Polyester
  • Line Side Wire Range: 4 AWG - 600 kcmil or Two 1/0 AWG - 250 kcmil
  • Load Side Wire Range: 6 AWG - 350 kcmil
  • Main Breaker Size: No Main Breaker
  • Number Of Main Breakers: 0
  • Number Of Meter Positions: 3 Positions
  • Number Of Receptacles: 0
  • Phase: 1 Phase
  • Product Family Code: G150
  • Product Height: 14 IN
  • Product Length: 5.188 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 5.188L x 34.5W x14H
  • Product Type: Ringless Meter Socket
  • Standard: UL Listed;Type 3R
  • Unspsc Number: 39121102
  • Voltage Rating: 300 Volts Alternating Current
  • Width: 34.5 IN

Professional Applications

  • Multi-Unit Residential Properties
  • Commercial Buildings
  • Apartment Complexes
  • Retail Centers
  • Professional Office Buildings
  • Mixed-Use Developments
  • Industrial Facilities

Why Choose Milbank Quality?

Milbank delivers proven reliability with UL Listed certification and Type 3R weather-resistant construction. The G90 galvanized steel with powder coat finish ensures long-term durability, while the glass polyester insulation and ground lug equipment grounding provide safe, code-compliant electrical service for professional installations.

Manufacturer Resources

Product Specs

Amperage Rating:
150 Continuous Ampere
Application:
Meter Socket
Brand Name:
Milbank
Bypass Provision:
No Bypass
Cable Entry:
Overhead or Underground
Equipment Ground:
Ground Lug
Frequency Rating:
60 Hertz
Hub Closing Plate:
Large Closing Plate
Insulation:
Glass Polyester
Line Side Wire Range:
4 AWG - 600 kcmil or Two 1/0 AWG - 250 kcmil
Load Side Wire Range:
6 AWG - 350 kcmil
Main Breaker Size:
No Main Breaker
Number Of Main Breakers:
0
Number Of Meter Positions:
3 Positions
Number Of Receptacles:
0
Phase:
1 Phase
Product Family Code:
G150
Product Height:
14 IN
Product Length:
5.188 IN
Product Size:
5.188L x 34.5W x14H
Product Type:
Meter Stack
Standards:
UL Listed;Type 3R
Unspsc Number:
39121102
Voltage Rating:
300 Volts Alternating Current
Product Material:
G90 Galvanized Steel with Powder Coat Finish
Product Mounting:
Surface Mount
Amps:
150
Product Width:
34.5 IN
Department:
Electrical
Product Subgroup:
Metering & Meter Sockets
Insulation Type:
Glass Polyester
Hub Style:
Large Closing Plate
Installation Category:
Surface Mount
Number of Phases:
1
Frequency:
60 hertz
Product Details:
Ringless Meter Socket
Product Group:
Power Distribution

Milbank U1233-X-HSP – Frequently Asked Questions

1) Will the Milbank U1233-X 3-position meter socket fit a 120/240V single phase service?
Yes. The U1233-X is a single phase, 4 terminal socket rated 300 volts AC at 60 hertz, which covers standard 120/240V single phase residential and multi-unit service. It will not serve a three phase service; that needs a 7 terminal socket.
2) What wire sizes can I land in the Milbank U1233-X meter socket?
Line side lugs take 4 AWG through 600 kcmil, or two conductors from 1/0 AWG through 250 kcmil for a parallel feed. Load side accepts 6 AWG through 350 kcmil. That range covers copper or aluminum service entrance conductors for a 150 amp continuous service.
3) Is the 150A rating on this Milbank socket per meter position or for the whole stack?
The 150 continuous ampere rating applies to the socket, and the enclosure carries three meter positions. There is no main breaker and no bypass provision in it, so any main disconnect or lever bypass has to come from separate equipment downstream or upstream.
4) Can I use this Milbank ringless socket for an underground service lateral?
Yes, cable entry is overhead or underground. It ships with a large closing plate over the hub opening, so for an overhead drop you remove the plate and fit the hub your utility requires. For an underground feed the closing plate stays in and you bring conductors in through the bottom.
5) What is the difference between a ringless meter socket and a ring-type one, and which does my utility want?
A ringless socket like the U1233-X uses a one piece cover that slips over the meter and is sealed by the utility, with no separate locking ring at the meter rim. Ring-type sockets use a sealing ring around the meter. The two are not interchangeable, and which one is accepted is set by the serving utility's meter specification, so confirm with them before ordering.
6) Is this Milbank meter socket rated for outdoor mounting on an exterior wall?
Type 3R, which is the rainproof enclosure rating for outdoor use against rain, sleet and ice, and it is UL Listed. The body is G90 galvanized steel with a powder coat finish, and internal insulation is glass polyester.
7) Which Milbank U1233-X option should I order, the 5T-K3 or the HSP?
Two options exist on the U1233-X. U1233-X-5T-K3 is the socket configured with single connector lugs for 4-600 kcmil line conductors. U1233-X-HSP is the version with a stainless steel hasp, which is what you want where the cover needs to be padlocked or sealed shut.
8) Does this Milbank meter stack include receptacles or house panel space for an apartment building?
No. The U1233-X is a bare 3-position metering enclosure: zero receptacles, zero main breakers, no bypass. Branch distribution and any house panel are separate equipment. If you want metering and breakers in one assembly, you need a meter main or meter pack rather than this socket.
9) Do I need to add a separate grounding kit to this Milbank 3-position socket?
No separate kit is needed for equipment grounding. The socket comes with a ground lug for the equipment grounding conductor. Neutral and grounding electrode conductor sizing still follows your local code and utility rules.
How fast can I get the Milbank U1233-X-HSP 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 U1233-X-HSP come with a warranty?
Absolutely. The Milbank U1233-X-HSP 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 U1233-X-HSP?
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 U1233-X-HSP from ZenSupply?
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