Meter Sockets

Specifications for electric meter types by manufacturer are provided below.

Meter Socket Description Approved Manufacturers
Self-Contained Socket. Single phase, 3 Wire, 200S, 4 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.

Note: For 120/208V services, a 5th lug kit must be purchased and installed by contractor.
Milbank (U4888-XL-AE)
Square D (1006352C-SQD)
Durham (1006352C)
Cutler-Hammer ( 1006352C-CH)
Midwest Electrical Products (1006352C -MEP)

5th Terminal Kits:
Milbank 5th Term (K3866)
Self-Contained Socket. Single phase, 3 Wire, 320S, 4 terminals, ring-less type with the anti-inversion device, ring-less, and equipped with lever by-pass in accordance with AE Specification E-1045 (pdf). 350 Amp Maximum Breaker/Disconnect. Applicable to Commercial and Non-Commercial meter installations.

Service Voltage: 120/240V.
Milbank (U4738-X-2/K3-AE with K4802)
Durham (1010468)
Cutler-Hammer (1010468-CH )
Square D ( 1010468-SQD)
Midwest Electric Products( 1010468-MEP)
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-AE)
Durham (1006353C)
Cutler-Hammer (1006353C-CH)
Square D ( 1006353C-SQD)
Midwest Electric Products( 1006353C-MEP)
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-AE)
Durham (STL6-1A433)
Cutler-Hammer (STL6-1A433-CH)
Square D (STL6-1A433-SQD)
Midwest Electric Products( STL6-1A433-MEP)
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-AE)
Durham (STL13-1A120)
Cutler-Hammer (STL13-1A-1A120-CH )
Square D (STL13-1A120-SQD)
Midwest Electric Products( STL13-1A-120-MEP)
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)

Note: AE will install Customer provided Voltage Transformer (VT) Pack- required for 277/480V services.
Milbank (SC4832-XL-WBC-21)
Or Complex Metering approved equal. Contact AE Complex Metering Operations at (512)505-7045.
Instrument Rated (IR) Transocket. Single Phase, 6 terminal meter socket prewired to a 6 pole test switch, (2) 200:5, Bar-type Current Transformers (CT’s) with a rating factor (RF) of 3.0 @ 55 deg C., with Factory installed double Lug connectors.

Service Voltage: 120/240V
Milbank (S3831-XT-200-51-AE) or approved Complex Metering Approved equal. Contact AE Complex Metering Operations at (512)505-7045.
Instrument Rated (IR) Transocket. Three phase, 13 terminal meter socket prewired to a 10 pole test switch, (3) 200:5, Bar-type Current Transformers (CT’s) 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.

Note: For 277/480V services, the customer is required to purchase a Voltage Transformer (VT) enclosure, VT Pack, and a VT Harness.
(AE will install the VT Pack and VT Harness.)
Milbank (S2674-XT-200-91-AE)
Or Complex Metering approved equal. Contact AE Complex Metering Operations at (512)505-7045.
Modular Metering Equipment in accordance with AE Specification E-1589 (pdf)

Customer must provide the following:
  • Modular Metering Request Form
  • Highlighted Equipment Cut Sheets
  • Approved ESPA(s)
  • Electrical Riser Diagram/ One-Line
  • Sight Plan
Customer shall have AE Complex Metering Operations written approval prior to procurement.
Contact AE Complex Metering Operations at (512)505-7045.
Date last reviewed or modified: 3/26/18

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