Table 3

Approved Meter Service Devices

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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
U9700-RRL-BLG 200 17 x 10 x 5 2 350 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 Landis + Gyr (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)
12/2017 Murray RK7 9564 Removed 600 Amps (CI 480) (Bolt-in metering)
12/2017 Siemens S9817 9564 Removed 600 Amps (CI 480) (Bolt-in metering)
12/2017 Talon 9817 9564 Removed 600 Amps (CI 480) (Bolt-in metering)
12/2017 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
  8. 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 REQUIREMENTS

      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