Milbank 4-Pole Instrument Rate...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$160.00
$142.74
Milbank TS04-0101 4 Pole Test Switch 0101

Milbank 4-Pole Instrument Rated Metering Test Switch 20A 600V Bronze Alloy Construction

(No reviews yet) Write a Review

Model: TS04-0101

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

$160.00
$142.74
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Milbank 4-Pole Instrument Rated Metering Test Switch

Professional metering accessory for reliable electrical testing applications

The Milbank 4-Pole Instrument Rated Metering Test Switch delivers professional-grade performance for electrical metering applications. Featuring a robust 20 ampere rating at 600 volts AC, this bronze alloy construction test switch provides reliable operation at 60 Hz frequency. The specialized pole arrangement includes potential, barrier, and current configurations with stud connections for secure installation in metering systems.

Professional Features & Benefits

  • 20 Ampere Rating: Handles substantial electrical loads for versatile metering applications with reliable current capacity.
  • 600V AC Operation: Compatible with high-voltage systems providing flexibility for commercial and industrial installations.
  • Bronze Alloy Construction: Durable metallic material ensures long-term performance and resistance to electrical and environmental stress.
  • 4-Pole Configuration: Specialized arrangement with potential, barrier, and current poles enables comprehensive metering test capabilities.
  • UL Listed Certification: Meets rigorous safety and performance standards ensuring code compliance and professional installation confidence.
  • Stud Connection Design: Secure mechanical connection method provides reliable electrical contact and simplified installation procedures.
  • Non-Metallic Insulation: Proper electrical isolation between components enhances safety and prevents unwanted current paths.

Technical Specifications

  • Amperage Rating: 20 Ampere
  • Application: Metering Accessory
  • Brand Name: Milbank
  • Connection: Stud
  • Departent: Electrical
  • Enclosure: No Enclosure
  • Frequency Rating: 60 Hertz
  • Handle Color Arrangement: Red; Red; Black; Black
  • Insulation: Non Metallic
  • Number Of Poles: 4
  • Pole Arrangement: Potential; Barrier; Potential; Barrier; Current; Current Return
  • Product Family Code: TESW
  • Product Height: 3.5 IN
  • Product Length: 2.906 IN
  • Product Material: Bronze Alloy
  • Product Type: Instrument Rated Metering Test Switch
  • Standard: UL Listed
  • Unspsc Number: 39122215
  • Voltage Rating: 600 Volts Alternating Current
  • Width: 7.5 IN

Professional Applications

  • Commercial Building Metering Systems
  • Industrial Facility Power Monitoring
  • Multi-Tenant Property Electrical Distribution
  • Utility Metering Infrastructure
  • Electrical Testing and Maintenance Operations
  • Professional Service Panel Applications
  • Instrumentation and Control Systems

Why Choose Milbank Quality?

Milbank delivers proven reliability through UL Listed certification and professional-grade bronze alloy construction. The precision-engineered 4-pole design with specialized handle color arrangement ensures accurate testing procedures while maintaining the durability expected from professional electrical components.

Manufacturer Resources

Product Specs

Amperage Rating:
20 Ampere
Application:
Metering Accessory
Brand Name:
Milbank
Connection:
Stud
Configuration:
No Enclosure
Frequency Rating:
60 Hertz
Handle Color Arrangement:
Red; Red; Black; Black
Insulation:
Non Metallic
Number Of Poles:
4
Pole Arrangement:
Potential; Barrier; Potential; Barrier; Current; Current Return
Product Family Code:
TESW
Product Height:
3.5 IN
Product Length:
2.906 IN
Product Type:
Instrument Rated Metering Test Switch
Standards:
UL Listed
Unspsc Number:
39122215
Voltage Rating:
600 Volts Alternating Current
Product Material:
Bronze Alloy
Amps:
20
Product Width:
7.5 IN
Department:
Electrical
Product Subgroup:
Electrical

Milbank TS04-0101 – Frequently Asked Questions

1) What does a Milbank TS04-0101 4-pole test switch actually do in a metering installation?
It's a test switch that sits between the instrument transformers and the meter so a technician can isolate and test the meter without killing the service. The pole arrangement runs potential, barrier, potential, barrier, current, current return, so the two potential circuits are physically separated by barriers from the CT current path. Handles are colored red, red, black, black to keep the potential blades distinct from the current blades when you're working live. Rated 20 amps at 600 volts AC, 60 Hz.
2) Does the Milbank TS04-0101 test switch come with an enclosure or box?
No enclosure. The TS04-0101 ships as the switch assembly only, so you're mounting it inside a metering cabinet, panel, or instrument enclosure you already have or order separately. Plan the cutout around the switch body: 3.5 inches high, 2.906 inches long, 7.5 inches wide.
3) Is the Milbank 4-pole metering test switch rated for a 480V three-phase service?
Yes. The voltage rating is 600 volts AC, which covers 480Y/277 and 480 delta systems as well as 208/120. Current rating is 20 amps at 60 Hz, which is sized for instrument transformer secondaries, not for carrying service load. Don't put line current through it.
4) Is 4 poles enough for a three-phase metering installation, or do I need more?
Four poles on the TS04-0101 covers two potential circuits and one current circuit with its return: potential, barrier, potential, barrier, current, current return. That suits a two-element metering setup, which is the common 3-phase 3-wire arrangement. A 3-element installation with three current circuits and three potentials needs a larger switch. Count the CT secondaries and potential leads coming into your cabinet, and if you have three of each, this isn't the pole count you want.
5) How do the wires land on the Milbank TS04-0101, screw terminals or studs?
Stud connections. You're landing ring-terminal lugs onto threaded studs and torquing nuts down, not pushing bare conductors into a clamp. That means terminating your CT secondary and potential leads with ring lugs sized for the stud before you get to the switch, which is worth knowing on a retrofit where the existing device used box lugs.
6) Is the Milbank TS04-0101 test switch UL Listed for a utility or commercial job?
UL Listed, which is the line item most utility and inspection specs want to see on a metering test switch. If the submittal calls for a UL Listed instrument rated test switch at 600V, the TS04-0101 meets that on the face of it.
7) What model number do I order for the Milbank 4-pole metering test switch?
Milbank TS04-0101. That's the manufacturer part number and there's a single configuration, so there's no finish, handle, or pole option to specify on the order. What you may still need alongside it is the mounting enclosure and ring lugs for the stud terminations, since neither comes with the switch.
8) Can I use a metering test switch to disconnect load, or is it only for testing?
Testing only. The TS04-0101 is an instrument rated device at 20 amps, built to open and short instrument transformer secondaries and break potential circuits so a meter can be tested or swapped. It is not a load-break disconnect and won't interrupt service current. For isolating load you need a switch or breaker rated for the service, and for CT secondaries specifically, always short the current circuit before opening it.
9) What is the Milbank test switch made of, and will it hold up in a damp outdoor meter cabinet?
Current-carrying parts are bronze alloy, with non-metallic insulation between the poles. Bronze holds contact pressure and resists the corrosion that pits plated steel in humid or coastal service. Since the switch has no enclosure of its own, the environmental protection comes from the cabinet you mount it in, so that cabinet's rating is what governs an outdoor location.
How fast can I get the Milbank TS04-0101 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 TS04-0101 come with a warranty?
Absolutely. The Milbank TS04-0101 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 TS04-0101?
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 TS04-0101 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!