Milbank 400A 3-Phase Ringless ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,906.67
$1,207.66
Milbank S4244-X 13 Terminal Ringless Large Closing Plate Test Switch Provision 20in-34in-12in Painted Steel Single Front Lift Off Cover Hasp Current Transformer Rack Installed

Milbank 400A 3-Phase Ringless Meter Socket with Current Transformer Rack and Test Switch Provision

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Model: S4244-X

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

$1,906.67
$1,207.66
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Milbank 400A 3-Phase Ringless Meter Socket with Current Transformer Rack and Test Switch Provision

Professional metering solution with integrated current transformer rack and test switch provision

The Milbank 400A 3-Phase Ringless Meter Socket delivers reliable electrical metering for commercial and industrial applications. This professional-grade meter socket features a 400 continuous ampere rating with 3-phase configuration, constructed from G90 galvanized steel with powder coat finish for durability. The unit includes an integrated current transformer rack and test switch provision for enhanced monitoring capabilities, housed in a Type 3R enclosure suitable for overhead or underground cable entry applications.

Professional Features & Benefits

  • 400 Continuous Ampere Rating: Handles high-capacity electrical loads for demanding commercial and industrial applications with reliable performance.
  • 3-Phase Configuration: Supports three-phase power distribution systems commonly required in commercial facilities and industrial operations.
  • Current Transformer Rack Installed: Integrated CT rack enables accurate power monitoring and measurement for professional electrical management.
  • Test Switch Provision: Built-in test switch capability allows for safe electrical testing and maintenance procedures without service interruption.
  • Type 3R Enclosure Rating: Weather-resistant construction protects internal components from rain, sleet, and ice formation for outdoor installations.
  • G90 Galvanized Steel Construction: Durable steel construction with powder coat finish provides long-lasting protection against corrosion and environmental factors.
  • 13 Terminal Configuration: Multiple terminal points accommodate complex wiring requirements for comprehensive electrical distribution.

Technical Specifications

  • Amperage Rating: 400 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: 14 - 10 AWG
  • Load Side Wire Range: 14 - 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: TRNS
  • Product Height: 34 IN
  • Product Length: 20 IN
  • Product Material: G90 Galvanized Steel with Powder Coat Finish
  • Product Mounting: Surface Mount
  • Product Size: 20L x 12W x34H
  • Product Type: Ringless Meter Socket
  • Standard: Non UL Listed;Type 3R
  • Terminal: 1/2 Inch Stud Line Side
  • Unspsc Number: 39121102
  • Voltage Rating: 600 Volts Alternating Current
  • Width: 12 IN

Professional Applications

  • Commercial Buildings and Office Complexes
  • Industrial Facilities and Manufacturing Plants
  • Multi-Unit Residential Properties
  • Retail and Shopping Centers
  • Educational Institutions
  • Healthcare Facilities
  • Municipal and Government Buildings

Why Choose Milbank Quality?

Milbank meter sockets deliver professional-grade reliability with Type 3R weather-resistant construction and durable G90 galvanized steel materials. The powder coat finish provides additional protection against environmental factors, ensuring long-term performance in demanding electrical applications. Ground lug equipment grounding and glass polyester insulation contribute to safe, dependable operation for critical electrical infrastructure.

Manufacturer Resources

Product Specs

Amperage Rating:
400 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:
14 - 10 AWG
Load Side Wire Range:
14 - 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:
TRNS
Product Height:
34 IN
Product Length:
20 IN
Product Size:
20L x 12W x34H
Product Type:
Ringless Meter Socket
Standards:
Non UL Listed;Type 3R
Terminal:
1/2 Inch Stud Line Side
Unspsc Number:
39121102
Voltage Rating:
600 Volts Alternating Current
Product Material:
G90 Galvanized Steel with Powder Coat Finish
Product Mounting:
Surface Mount
Amps:
400
Product Width:
12 IN
Department:
Electrical
Product Subgroup:
Metering & Meter Sockets
Product Group:
Power Distribution

Milbank S4244-X – Frequently Asked Questions

1) Will the Milbank S4244-X meter socket work on a 3-phase 400 amp commercial service?
That's exactly what the S4244-X is built for. It's a single-position ringless socket rated 400 continuous amperes, 3 phase, 600 volts AC at 60 hertz, with a 13 terminal jaw configuration. The 13 terminal arrangement is the transformer-rated pattern, so it goes on a service that meters through current transformers rather than one where the full service current passes through the meter itself.
2) Does the Milbank S4244-X come with the CT rack, or do I have to order it separately?
The current transformer rack is installed in the enclosure when it ships. The socket also carries a test switch provision, so the meter tech has a place to land a test switch block for verification without pulling the service. The CTs themselves are a separate item and are normally supplied by the utility, so confirm with the serving utility what ratio they want before you set the can.
3) Is there a main breaker or bypass in this 400A Milbank socket?
No on both counts. The S4244-X is a metering enclosure only: no main breaker, no bypass provision, and no receptacles. Overcurrent protection has to live in a separate disconnect or panel downstream. If your utility requires a lever bypass so the meter can be pulled under load, this socket won't satisfy that rule and you need a bypass-equipped can instead.
4) Can the Milbank S4244-X be mounted outdoors on an exterior wall?
Yes. It's a Type 3R enclosure, which means it sheds rain, sleet and ice for outdoor wall use, built from G90 galvanized steel with a powder coat finish. It's a surface mount can, so it lands flat on the wall or on unistrut rather than recessing into it. One thing to flag for a plan check: the socket is non UL listed, so verify your AHJ and utility accept it on the service before you set it.
5) I need a 400 amp 3-phase socket where the current runs straight through the meter. Is this the right Milbank can?
No. The S4244-X is a transformer-rated enclosure with a CT rack installed and a 13 terminal jaw pattern, meaning the meter reads through current transformers. If your utility wants a self-contained 400 amp 3-phase installation, you need a self-contained socket with the jaw count the utility specifies, not a CT can. Get the utility's meter form and jaw requirement in writing first, because the two designs are not substitutes for one another.
6) Is the Milbank S4244-X UL listed?
The S4244-X is stated as non UL listed and carries a Type 3R enclosure rating. On a utility service that distinction can decide the job, since some jurisdictions and utilities will only accept listed metering equipment on their side of the connection. Confirm acceptance with your AHJ and the serving utility before it goes on the wall.
7) What do I need to order alongside the Milbank S4244-X to finish a CT metering install?
The socket arrives with the CT rack installed and a large closing plate, and it provides for a test switch. What it does not include: the current transformers themselves (usually the utility's to supply, at the ratio they specify), the test switch block, the hub or fitting for the service entrance through the closing plate, and the downstream disconnect or main breaker, since there's no main and no bypass in this enclosure. Grounding lands on the ground lug in the can.
8) How much wall space do I need for the Milbank S4244-X meter socket?
The can measures 20 x 12 x 34 inches, with the height stated as 34 inches, the length 20 inches and the width 12 inches. The 12 inch depth matters more than most people expect on a CT can, so allow for it if you're setting it in a meter closet or between a wall and a fence line. The cover is a single front lift-off with a hasp, so leave clear working space in front to take the cover off.
9) Can I bring the service into this Milbank CT socket from underground, or does it have to be overhead?
Either. The S4244-X is set up for overhead or underground cable entry, and it ships with a large hub closing plate so you can cut and fit the hub or fitting your entry needs. Overhead runs go through a hub in the closing plate; underground feeds come up through the bottom. Equipment grounding is by ground lug in the can.
10) What size conductors land in the Milbank S4244-X, and what are the line side terminals?
The line side uses 1/2 inch studs, so service conductors land on lugs or compression terminals bolted to those studs rather than into a set screw connector. The stated line and load side wire range on the socket's terminations is 14 to 10 AWG, which is the instrument and metering wiring, not the service conductors. Plan your service entrance conductor terminations around the 1/2 inch stud landing.
11) What is the difference between a ringless meter socket and a ring-type socket, and which one does my utility want?
A ringless socket like the Milbank S4244-X uses a lift-off front cover that overlaps the meter and is sealed by the utility at the hasp, with no separate sealing ring around the meter. A ring-type socket has a smaller cover opening and takes a locking ring band around the meter rim. The two are not interchangeable, and which one you can install is dictated by the serving utility's meter specification, not by preference. Check the utility spec book before ordering.
12) How many meters can I put on the Milbank S4244-X?
One. It's a single position socket, so it serves one metered service. For a multi-tenant building where each unit needs its own meter, you want a multi-position meter stack or a bank of individual sockets, not this can. Where the S4244-X fits is the single large 3-phase service, a commercial suite, a retail pad, or the house service on a multi-family property.
13) What insulates the jaws and busing inside the Milbank S4244-X?
Glass polyester is used for the internal insulation, which is the standard rigid thermoset base material in commercial metering enclosures and holds up at the 600 volt rating of the socket. The enclosure itself is G90 galvanized steel with a powder coat finish over it, so the can resists corrosion in outdoor service.
14) What is the exact Milbank part number for this 400A 3-phase CT socket?
Model S4244-X from Milbank. It's a 13 terminal ringless CT socket, 400 amp continuous, 3 phase, 600 volt, in a 20 x 12 x 34 inch Type 3R painted steel enclosure with a single front lift-off cover and hasp.
How fast can I get the Milbank S4244-X 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 S4244-X come with a warranty?
Absolutely. The Milbank S4244-X 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 S4244-X?
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 S4244-X from ZenSupply?
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