Table 4

Approved Meter Service Devices

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Effective December 12, 2017
Updates All Previous Tables
 

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

MFG. & CATALOG #

SERVICE AMPS

DIMENSIONS (INCHES) HxWxD

TERMINAL SIZE
(AWG OR KCMIL)

BYPASS TYPE

MAX UG WIRE SIZE

MIN.

MAX.

See Note # 2

MILBANK
U-3786
(side-wired)

200

19 x 18 x 61/2

6

350

Lever

350

U-4168
(side-wired) 

400
(Cl 320)

343/4 x 19 x 61/2

See Note #8

Lever

750

SIEMENS 
S9804-9096
(side-wired) 

200

201/4 x 161/4 x 5

4

600

Lever

350

S9804-9142
(side-wired) 

200 

201/4 x 161/4 x 5

4

600

Lever 

350 

S44707-02PP
(side-wired) 

400
(Cl 320)

34 x 20 x 61/4

See Note #8

Lever

750

TALON (formerly LANDIS & GYR) 
9804-9142
(side-wired) 

200

201/4 x 161/4 x 5

4

600

Lever

350

44707-02PP
(side-wired) 

400
(Cl 320)

34 x 20 x 61/4

See Note #8

Lever

750

 

MOST RECENT CHANGES

DATE MFG. CATALOG #  STATUS  REASON
12/2017 Eaton/Cutler Hammer  CH9802K7 Removed 600 Amps (CI 480) (Bolt-in metering)
Siemens  S9817 9802 Removed 600 Amps (CI 480) (Bolt-in metering)
Talon 9817 9802 Removed  600 Amps (CI 480) (Bolt-in metering)
Note 9    Removed Class 480 V Meter Bases
    Removed  480 V Circuit Breaker/Meter Base Combinations 

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.

Conduit Requirements:

  • 200 Amp Service - The conduit KO directly under the line (utility) terminals must accept a 3 inch conduit.
  • 400 Amp (Cl 320) Service - The conduit KO directly under the line (utility) terminals must accept a 4 inch conduit. The conduit KOs directly under the load terminals must accept two(2) 3 1/2 inch conduits.
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