Table 3

Approved Meter Service Devices

(print from .pdf)

Effective December 12, 2017
Updates All Previous Tables

Polyphase, Single Position
OVERHEAD ENTRANCE
100, 200 or 400 Amp, 208/120 Volt Wye or 240/120 Volt Delta
7 Terminal

MFG. &
CATALOG #

SERVICE
AMPS

DIMENSIONS
(INCHES)

TERMINAL SIZE
(AWG OR KCMIL)

BYPASS
TYPE

HxWxD

MIN.

MAX.

SEE NOTE #2

EATON/CUTLER HAMMER
1004138A-CH

200

 341/2 x 15 x 511/16

4

500

Lever

DURHAM
1004138A

200

341/2 x 15 x 511/16

4

500

Lever

MURRAY 
RH-173GR

200

17 x 10 x 5

6

 350

Lever

RH-173GRJ

200

17 x 10 x 5

6

350

Lever

MILBANK
U-7573

100 

14 x 8 x 41/4

 8

 2/0

 Lever

U-7421

200 

17 x 10 x 5

 2

 350

Lever 

U-4168

400
(Cl 320)

341/4 x 19 x 61/2

 See Note #8

Lever 

SIEMENS 
S40007-01 

200

17 x 10 x 5

6

350

Lever

S40007-01GP

200

17 x 10 x 5

6

350

Lever

S47707-81TH

200 

28 x 14 x 6

4

600

Lever

S44707-02PP

400
(Cl 320)

34 x 20 x 61/4

See Note #8

 Lever

SQUARE D
1004138A-SQD 
 

 200

 341/2 x 15 x 511/16

 4

 500

 Lever

TALON (formerly L&G) 
40007-01GP

200

17 x 10 x 5

6

350

Lever

44707-02PP

400
(Cl 320)

34 x 20 x 61/4

See Note #8

Lever

MOST RECENT CHANGES

DATE MFG. CATALOG #  STATUS  REASON 
12/2017 Eaton/Cutler Hammer CH9564K7  Removed 600 Amps (CI 480) (Bolt-in metering)
 Murray RK7 9564 Removed 600 Amps (CI 480) (Bolt-in metering)
 Siemens S9817 9564 Removed 600 Amps (CI 480) (Bolt-in metering)
 Talon 9817 9564 Removed 600 Amps (CI 480) (Bolt-in metering)
   Note 9 Removed Class 480 V Meter Bases

NOTES:

  1. All meter bases listed in this table are "ringless" style and are rated 600 volts AC unless otherwise noted.
  2. All polyphase socket style bases must contain a lever bypass rated 100% continuous duty.
  3. The manufacturer's catalog number must be stamped on the outside of the meter base so that it will be visible after the base is installed. The number must not be stamped on the cover.
  4. When aluminum conductors are used, the electrical contractor must apply the corrosion inhibiting compound recommended by and in the manner prescribed by the cable manufacturer.
  5. All 200 amp meter bases capable of accepting 500 Kcmil conductor must be marked "200 Amp Capacity".
  6. The third jaw from the left (as viewed from the front) on the bottom row of the seven jaw block must be connected to the neutral using a #14 awg or larger copper wire.
  7. Hub requirements:
  8. Connector Size Minimum Hub Size
    350 Kcmil  21/2 inch
    500 Kcmil 3 inch 
    800 Kcmil 31/2 inch
  9. Class 320 Meter Bases:
    • All 320 amp meter bases contain stud terminals.
    • Only UL approved lay-in or box style connectors suitable for use with copper or aluminum conductors can be installed for wire termination on the studs.
    • Compression connectors are not permitted.
    • The upper right hand jaw (as viewed from the front) must contain an "anti-inversion" insert to prevent inverted meter installation or installation of a lower class meter.

    CLASS 320 METER BASE
    CONNECTOR REQUIREMENT

    Line Side Terminals Line Side Neutral Terminals Load Side Terminals
    WIRE RANGE Single Only 350 to 750 Kcmil 4/0 Awg to 500 Kcmil Single--Up to 600 Kcmil
    Double--Up to 350 Kcmil 

     

    APPROVED CONNECTORS FOR
    CLASS 320 METER BASES

    MFG.

    LINE SIDE
    TERMINALS 

    LINE SIDE NEUTRAL
    TERMINALS

    LOAD SIDE
    TERMINALS
     

    MURRAY, SIEMENS,
    TALON (formerly L&G)

    56476

    60162

    Single - 60162
    Double - 56732

    MILBANK

    K3863

    K1540 

    Single - K1540
    Double - K1350