Milbank 1-Position Ringless Me...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4,050.61
Milbank U4554-X-Z21 13-Terminal Ringless Test Switch Meter Enclosure | LISCO Approved

Milbank 1-Position Ringless Meter Socket Enclosure 600V 1-Phase with Test Switch - LISCO Approved

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Model: U4554-X-Z21-K6SP-LI

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

$4,050.61
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Milbank 1-Position Ringless Meter Socket Enclosure 600V 1-Phase with Test Switch - LISCO Approved

Professional meter socket solution with integrated test switch functionality

The Milbank 1-Position Ringless Meter Socket Enclosure delivers reliable 600V 1-Phase metering with integrated test switch capability. Featuring G90 galvanized steel construction with powder coat finish and Type 3R rating, this surface-mount enclosure provides durable outdoor performance. LISCO approved for Long Island Lighting Company applications with glass polyester insulation and 6-terminal configuration supporting overhead or underground cable entry.

Professional Features & Benefits

  • 600V AC Rating: Handles high-voltage applications with reliable electrical performance and safety compliance.
  • Type 3R Enclosure: Weather-resistant construction protects against rain, sleet, and ice formation for outdoor installations.
  • G90 Galvanized Steel with Powder Coat: Superior corrosion resistance and long-lasting durability in harsh environmental conditions.
  • 6-Terminal Configuration: Accommodates wire ranges from 4 AWG to 600 kcmil or dual 1/0 AWG to 250 kcmil for flexible connection options.
  • Glass Polyester Insulation: Provides excellent electrical isolation and thermal stability for consistent performance.
  • LISCO Approved: Meets Long Island Lighting Company specifications for utility compliance and installation acceptance.
  • Integrated Test Switch: Enables safe meter testing and maintenance without service interruption.

Technical Specifications

  • Application: Meter Socket
  • Brand Name: Milbank
  • Bypass Provision: No Bypass
  • Cable Entry: Overhead or Underground
  • Departent: Electrical
  • Frequency Rating: 60 Hertz
  • Hub Closing Plate: Large Closing Plate
  • Insulation: Glass Polyester
  • Load Side Wire Range: 4 AWG - 600 kcmil or Two 1/0 AWG - 250 kcmil
  • Main Breaker Size: No Main Breaker
  • Number Of Jaws: 6 Terminal
  • Number Of Main Breakers: 0
  • Number Of Meter Positions: 1 Position
  • Number Of Receptacles: 0
  • Phase: 1 Phase
  • Product Family Code: TRNS
  • Product Height: 41 IN
  • Product Length: 10 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Type: Ringless Meter Socket
  • Special Features: Long Island Lighting Company
  • Standard: UL Listed;Type 3R
  • Terminal: Single Mechanical
  • Unspsc Number: 39121102
  • Voltage Rating: 600 Volts Alternating Current
  • Width: 21 IN

Professional Applications

  • Residential Service Metering
  • Commercial Building Electrical Service
  • Multi-Unit Property Metering
  • Utility Service Connections
  • Long Island Lighting Company Territory Installations
  • Overhead and Underground Service Applications

Why Choose Milbank Quality?

Milbank delivers proven reliability with UL Listed construction and Type 3R weather protection. The G90 galvanized steel with powder coat finish ensures long-term durability, while LISCO approval provides utility compliance confidence for professional electrical installations.

Manufacturer Resources

Product Specs

Application:
Meter Socket
Brand Name:
Milbank
Bypass Provision:
No Bypass
Cable Entry:
Overhead or Underground
Frequency Rating:
60 Hertz
Hub Closing Plate:
Large Closing Plate
Insulation:
Glass Polyester
Load Side Wire Range:
4 AWG - 600 kcmil or Two 1/0 AWG - 250 kcmil
Main Breaker Size:
No Main Breaker
Number Of Jaws:
6 Terminal
Number Of Main Breakers:
0
Number Of Meter Positions:
1 Position
Number Of Receptacles:
0
Phase:
1 Phase
Product Family Code:
TRNS
Product Height:
41 IN
Product Length:
10 IN
Product Type:
Ringless Meter Socket
Special Features:
Long Island Lighting Company
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
Product Width:
21 IN
Department:
Electrical
Product Subgroup:
Metering & Meter Sockets
Insulation Type:
Glass Polyester
Hub Style:
Large Closing Plate
Installation Category:
Surface Mount
Terminal Type:
Single Mechanical
Number of Phases:
1
Product Details:
Ringless Meter Socket
Frequency:
60 hertz
Number of Terminations:
6
Product Group:
Power Distribution

Milbank U4554-X-Z21-K6SP-LI – Frequently Asked Questions

1) Will this Milbank ringless meter socket be accepted by the utility on Long Island?
The Milbank U4554-X-Z21-LI is built to LISCO (Long Island Lighting Company) requirements, which is why the LI suffix is on the part number. If you are working in another utility's territory, confirm their approved socket list first, because this one is specced for LISCO.
2) What size service wire will fit the load side terminals on this Milbank meter socket?
The load side lugs take 4 AWG up to 600 kcmil, or two conductors per terminal from 1/0 AWG to 250 kcmil when you are paralleling. They are single mechanical terminals, six of them total.
3) Can I use this meter socket for an underground service lateral, or is it overhead only?
Either. Cable entry is rated for overhead or underground, and the enclosure ships with a large hub closing plate so you can open the top for an overhead hub or leave it closed and bring conduit in from below for an underground lateral.
4) Does this Milbank socket include a main breaker or bypass lever?
No. It is a meter socket only, with no main breaker and no bypass provision. Service disconnecting means has to be provided downstream in a separate panel or disconnect, so plan that into the job.
5) How much wall space do I need for this Milbank 1-position meter enclosure?
The enclosure measures 41 x 21 x 10 inches, surface mounted. Lay out the wall and any conduit stub-ups around that footprint before you set it, and leave the working clearance the utility and code require in front of it.
6) Is this Milbank meter socket rated for outdoor mounting?
Yes. It is UL Listed with a Type 3R enclosure rating, which covers rain, sleet and ice on an exterior wall. The shell is G90 galvanized steel with a powder coat finish for corrosion resistance.
7) Is a 6-jaw ringless socket the right choice for a single-phase 120/240V service?
This one is a 6-terminal, 1-phase socket rated 600V AC at 60 Hz, so it suits single-phase metering including network and transformer-rated style arrangements where the utility calls for six terminals. If your meter is a standard self-contained 4-jaw residential form, that is a different socket; match the jaw count the utility's meter requires.
8) What does the test switch on this Milbank enclosure let me do?
The integrated test switch lets a meter tech check or swap metering without dropping the customer's service. That is why utilities such as LISCO call for it on commercial and transformer-rated installations. Note there is still no bypass lever, so the switch is for test work, not for pulling the socket out of service.
9) What is the difference between the Milbank U4554-X-Z21-LI and the U4554-X-Z21-K6SP-LI?
Both are the same 1-position ringless LISCO test switch enclosure. The difference is the configuration suffix: U4554-X-Z21-LI is the base build, and U4554-X-Z21-K6SP-LI carries the K6SP option. Order by the full part number your utility or drawing calls out, since the suffix is what distinguishes them.
10) How many meters can this Milbank socket serve?
One. It is a single-position enclosure with no receptacles, so one meter per unit. For multi-unit property metering you need a multi-position gang socket or one enclosure per tenant.
11) What insulating material supports the jaws inside this Milbank meter socket?
Glass polyester, which holds up thermally and keeps dielectric performance stable in an unheated outdoor enclosure cycling under load.
How fast can I get the Milbank U4554-X-Z21-K6SP-LI 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 U4554-X-Z21-K6SP-LI come with a warranty?
Absolutely. The Milbank U4554-X-Z21-K6SP-LI 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 U4554-X-Z21-K6SP-LI?
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 U4554-X-Z21-K6SP-LI from ZenSupply?
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