Meter Sockets

Austin Energy Approved Meter Sockets

Specifications for electric meter types by manufacturer are provided below.

Self-Contained Meter Exposures
Meter Socket Description Approved Manufacturers
1. Single Phase: For services with a maximum manufacture nameplate handle(s) rating or breaker(s) less than or equal to 350 amps

A. Self-Contained Socket. Single phase, 3 Wire, 200S, 5 terminals, ring-less type and equipped with lever by-pass in accordance with AE specification E-1001 (pdf). 225 amp maximum breaker/disconnect. Applicable to Commercial and Non-Commercial meter installations.

Service Voltage: 120/208V, 120/240V, and 480V.

For 120/208V service, for 5-terminal sockets, the 5th terminal shall be factory installed by the manufacturer. Kit for 5th terminal is unacceptable.

Milbank (U4801-XL-5T9)
 
2. Three Phase: For services with a maximum manufacture nameplate handle(s) rating or breaker(s) less than or equal to 225 amps
A. Self-Contained Socket. Three phase, 4 wire, 200S, 7 terminals, ring-less type and equipped with lever by-pass in accordance with AE specification E-1002 (pdf). 225 amp maximum breaker/disconnect. Applicable to Commercial and Non-Commercial meter installations.

Service Voltage:
120/208V, 120/240V, and 277/480V.
  • Milbank
    (U4788-XL)
  • Durham (1006353C)
  • Cutler-Hammer (1006353C-CH)
  • Square D (1006353C-SQD)
  • Midwest Electric Products (1006353C-MEP)
B. Future C1320 Enclosures (not approved for use at this time)  
3. Modular Metering: Meter pak equipment and modular metering equipment
Modular Metering Equipment in accordance with AE Specification E-1589 (pdf)

Customer must provide the following:

Customer shall obtain written approval from Austin Energy Advanced Metering Systems & Engineering prior to procurement.


Contact Austin Energy Advanced Metering Systems & Engineering at 512-322-6680.

 

Transocket(s) Instrument-Rates Meter Enclosures
Meter Socket Description Approved Manufacturers
1. Single Phase: For services with a maximum manufacture nameplate handle(s) rating or breaker(s) of 400 amps or 600 amps
Instrument Rated (IR) Transocket. Single phase, 6 terminal meter socket prewired to a 6 pole test switch, (2) 600:5, bar-type Current Transformers (CTs) with a rating factor (RF) of 3.0 @ 55 deg C., with factory-installed double lug connectors.

Service Voltage: 120/240V, 600 amp maximum disconnect only.
  • Milbank
    (S3831-XT-600-51-AE)
  • Brooks
    (TMD-600-6-AE)

Contact Austin Energy Distribution Metering Operations at 512-505-7045.

2. Three Phase: For services with a maximum manufacture nameplate handle(s) rating or breaker(s) of 400 amps or 600 amps

Instrument Rated (IR) Transocket. Three phase, 13 terminal meter socket prewired to a 10 pole test switch, (3) 600:5, Bar-type Current Transformers (CTs) with a rating factor (RF) of 3.0 @ 55 deg C., with factory-installed double lug connectors.

Service Voltage:
120/208V, 120/240V, and 277/480V, 600 amp maximum disconnect only.

For 277/480V services, the customer is required to purchase a Voltage Transformer (VT) enclosure, VT Pack, and a VT Harness. Austin Energy will install the VT Pack and VT Harness.

  • Milbank
    (S2674-XT-600-91-AE)
  • Brooks (TMD-600-9-AE)

Contact Austin Energy Distribution Metering Operations at 512-505-7045.

 

Instrument-Rated Meter Enclosures
Meter Socket Description Approved Manufacturers
1. Single Phase: For services with a maximum manufacture nameplate handle(s) rating or breaker(s) greater than 600 amps
Instrument Rated (IR) Socket. Single phase, 3 wire, 6 terminal with prewired test switch in accordance with AE Specification E-1565 (pdf). Applicable to Commercial and Non-Commercial meter installations.

Service Voltage: 120/240V
  • Milbank
  • (UC-4666-0-WCB-21)
  • Durham
  • (STL6-1A433)
  • Cutler-Hammer
  • (STL6-1A433-CH)
  • Square D
  • (STL6-1A433-SQD)
  • Midwest Electric Products
  • (STL6-1A433-MEP)
2. Three Phase: For services with a maximum manufacture nameplate handle(s) rating or breaker(s) greater than 600 amps
A. Instrument Rated (IR) Socket. Three phase, 4 wire, 13 terminals with prewired test switch in accordance with AE specification E-1566 (pdf). Applicable to Commercial and Non-Commercial IR meter installations.

Service Voltage: 120/208V and 120/240V.
  • Milbank
    (UC4662-0-WCB-21)
  • Durham
    (STL13-1A120)
  • Cutler-Hammer
    (STL13-1A-1A120-CH)
  • Square D
    (STL13-1A120-SQD)
  • Midwest Electric Products
    (STL13-1A-120-MEP)
B. Instrument Rated (IR) Socket. Three phase, 4 wire, 13 terminals with prewired test switch with provisions for a customer provided Voltage Transformer (VT) Pack. In accordance with AE Specification E-1567 (pdf)

Austin Energy will install Customer-provided Voltage Transformer (VT) Pack - required for 277/480V services.

Milbank
(SC4832-XL-WBC-21)
or approved equal.

Contact Austin Energy Distribution Metering Operations at 512-505-7045.

 

Contact Us

All Austin Energy locations are temporarily closed for walk-in service in response to COVID-19.

Austin Energy Distribution Metering Operations

Contact for: Metering equipment and information, CT inspections, and general metering questions

Advanced Metering Systems and Engineering

Contact for: Modular metering and requests, solar variances, metering specifications, and general advanced metering questions

Date last reviewed or modified: 4/30/21

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