Milbank 150A 1-Phase Ringless ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$883.01
Milbankl 4 Terminal Ringless Meter Socket Small Closing Plate with Main Breaker, 150 Ampere

Milbank 150A 1-Phase Ringless Meter Socket with Main Breaker and Small Closing Plate

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Model: U3990-XL-150

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

$883.01
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Milbank 150A 1-Phase Ringless Meter Socket with Main Breaker and Small Closing Plate

Professional electrical metering solution with integrated main breaker protection

The Milbank 150A 1-Phase Ringless Meter Socket delivers reliable electrical metering and main breaker protection in a single professional unit. Featuring G90 galvanized steel construction with powder coat finish and Type 3R rating, this surface-mount meter socket provides durable performance for residential and light commercial applications. The 4-terminal design with lay-in terminals accommodates flexible wire sizing from line side 6 AWG - 350 kcmil to load side 1 AWG - 300 kcmil, while the integrated main breaker offers convenient overcurrent protection up to 240V AC.

Professional Features & Benefits

  • 150 Ampere Rating: Provides substantial electrical capacity for demanding residential and light commercial installations
  • 1-Phase 240V AC: Compatible with standard residential electrical systems for versatile application flexibility
  • Type 3R Enclosure: Weather-resistant rating ensures reliable outdoor performance and protection from environmental elements
  • G90 Galvanized Steel Construction: Superior corrosion resistance and structural durability for long-term service life
  • Integrated Main Breaker: Built-in overcurrent protection eliminates need for separate disconnect equipment
  • 4-Terminal Ringless Design: Simplified installation with lay-in terminals for secure conductor connections
  • UL Listed: Meets rigorous safety standards for professional electrical installations

Technical Specifications

  • Application: Meter Socket With Main
  • Brand Name: Milbank
  • Bypass Provision: No Bypass
  • Cable Entry: Overhead or Underground
  • Departent: Electrical
  • Equipment Ground: 3 Barrel Ground Lug
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Small Closing Plate
  • Insulation: Glass Polyester
  • Line Side Wire Range: 6 AWG - 350 kcmil
  • Load Side Wire Range: 1 AWG - 300 kcmil
  • Number Of Jaws: 4 Terminal
  • Number Of Main Breakers: 1
  • Number Of Meter Positions: 1 Position
  • Number Of Receptacles: 0
  • Phase: 1 Phase
  • Product Family Code: MTMN
  • Product Height: 29 IN
  • Product Length: 4.844 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 4.844L x 13W x29H
  • Product Type: Ringless Meter Socket
  • Standard: UL Listed;Type 3R
  • Terminal: Lay in
  • Unspsc Number: 39121102
  • Voltage Rating: Up to 240 Volts Alternating Current
  • Width: 13 IN

Professional Applications

  • Residential electrical service installations
  • Light commercial facilities
  • Multi-unit residential properties
  • Professional office buildings
  • Retail establishments
  • Service upgrade projects
  • New construction electrical systems

Why Choose Milbank Quality?

Milbank delivers proven reliability through UL Listed construction and Type 3R weather-resistant design. The G90 galvanized steel with powder coat finish ensures long-term durability and corrosion resistance, while the glass polyester insulation provides superior electrical performance. Professional contractors trust Milbank for consistent quality and dependable service in critical electrical metering applications.

Manufacturer Resources

Product Specs

Application:
Meter Socket With Main
Brand Name:
Milbank
Bypass Provision:
No Bypass
Cable Entry:
Overhead or Underground
Equipment Ground:
3 Barrel Ground Lug
Frequency Rating:
60 Hertz
Hub Closing Plate:
Small Closing Plate
Insulation:
Glass Polyester
Line Side Wire Range:
6 AWG - 350 kcmil
Load Side Wire Range:
1 AWG - 300 kcmil
Number Of Jaws:
4 Terminal
Number Of Main Breakers:
1
Number Of Meter Positions:
1 Position
Number Of Receptacles:
0
Phase:
1 Phase
Product Family Code:
MTMN
Product Height:
29 IN
Product Length:
4.844 IN
Product Size:
4.844L x 13W x29H
Product Type:
Ringless Meter Socket
Standards:
UL Listed;Type 3R
Terminal:
Lay in
Unspsc Number:
39121102
Voltage Rating:
Up to 240 Volts Alternating Current
Product Material:
G90 Galvanized Steel with Powder Coat Finish
Product Mounting:
Surface Mount
Product Width:
13 IN
Department:
Electrical
Product Subgroup:
Metering & Meter Sockets
Insulation Type:
Glass Polyester
Hub Style:
Small Closing Plate
Installation Category:
Surface Mount
Terminal Type:
Lay In
Number of Phases:
1
Frequency:
60 hertz
Product Details:
Ringless Meter Socket
Number of Terminations:
4
Product Group:
Power Distribution

Milbank U3990-XL-150 – Frequently Asked Questions

1) Will a Milbank U3990-XL meter socket work on a 200 amp service upgrade, or is it 150 amp only?
Both. The U3990-XL ringless meter socket with main breaker is ordered by main breaker ampere, either 1-150 (U3990-XL-150) or 1-200 (U3990-XL-200). Pick the breaker rating that matches the service you are pulling, since the breaker is built in and cannot be swapped at the panel. Either way it is a single phase, single meter position socket rated up to 240 volts AC at 60 hertz.
2) What size service entrance conductors will land in a Milbank U3990-XL meter socket?
Line side lay-in terminals take 6 AWG through 350 kcmil, and the load side takes 1 AWG through 300 kcmil. That covers the usual 4/0 aluminum SE cable on a 200 amp residential service and 2/0 aluminum on a 150 amp service without a reducer. Lay-in terminals mean you drop the conductor in and torque it down rather than fishing it through a closed lug.
3) Can this ringless meter socket be fed from an overhead drop, or does it have to be underground?
Either one. Cable entry is overhead or underground on the U3990-XL, so the same socket works for an existing weatherhead service or a new underground lateral. It ships with a small closing plate covering the hub opening, which you knock out and replace with the correct hub for a mast if you are going overhead.
4) Is a Milbank ringless meter socket approved for outdoor mounting on the side of a house?
Yes, the U3990-XL carries a Type 3R enclosure rating and is UL Listed, which is the rain-tight rating for exterior service equipment. Body is G90 galvanized steel with a powder coat finish for corrosion resistance, and it is a surface mount unit, so it bolts to the wall rather than setting into it.
5) Does a ringless meter socket need a separate service disconnect, or is the breaker in it enough?
The U3990-XL has one main breaker built in, so it is a combination meter socket and service disconnect. You do not need a separate disconnect ahead of the panel. What it does not have is any receptacle or feeder distribution, so branch circuits still go to a panel downstream of the load side lugs.
6) Is this a 4 jaw or 5 jaw meter socket, and will my utility accept a ringless one?
Four terminal, ringless, single position. Four jaws is the standard single phase 120/240 volt residential configuration; five jaw sockets are for network or 120/208 volt services and this is not one. Ringless versus ring type is a utility preference, so confirm your power company accepts a ringless socket in your area before you set it, since they own the seal.
7) Can I use this Milbank socket if the utility requires a meter bypass for hot swaps?
No. The U3990-XL is a no bypass socket. If your utility or your facility requires a lever or horn bypass so the meter can be pulled without dropping the load, this is the wrong unit and you need a socket ordered with a bypass provision.
8) Will this meter socket work on a 3 phase or 208Y service in a small commercial building?
No. The U3990-XL is single phase, four terminal, rated up to 240 volts AC. For a three phase service or a 120/208 volt wye service you need a 7 jaw three phase socket instead. It suits single phase residential, multi-family unit metering, and light commercial 240 volt services.
9) Where does the grounding electrode conductor land in a Milbank U3990-XL?
A 3 barrel ground lug is provided in the enclosure, so the grounding electrode conductor and equipment grounds terminate there without adding a separate lug kit. Internal insulation is glass polyester.
How fast can I get the Milbank U3990-XL-150 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 U3990-XL-150 come with a warranty?
Absolutely. The Milbank U3990-XL-150 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 U3990-XL-150?
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 U3990-XL-150 from ZenSupply?
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