Technical Data Bulletin

ManualsBrandsSquare D ManualsElectrical125-Amp Ringless Overhead/Underground Meter Socket

2-9

schneider-electric.us

Indoor/Rainproof EZM General Information EZ Meter-Pak™ Meter Centers

Class 4141 / Refer to Catalog 4100CT0701

EZM General Information

NEMA 3R Construction

240 Vac Maximum, for use on AC systems, suitable

for use as Service Equipment.

Utility Company Requirements Review local

utility requirements to ensure that metering

equipment meets their standards.

EZ Meter-Pak meter center enclosures meet NEC

wire bending requirements, and are designed for

wall mounting only (not suitable for floor mounting).

All unmetered conductor compartments may be

sealed by the utility company.

EZ Meter-Pak meter centers have UL Listed short

circuit current ratings up to 100 kA at 240 Vac when

properly applied. For three-tier series ratings refer to

Data Bulletin 4100DB0301 and Instruction Bulletin

80043-303-22.

Suitable incoming services for an EZM main

device and available outgoing feeder(s) to

downstream panelboards from EZM branch

section(s)—

Incoming Service to Main Device 120/240 Vac,

1Ø3W

Available outgoing feeder(s) to downstream

panelboards:

•

120/240 Vac, 1Ø3W

(4-jaw ring type meter sockets, two-pole circuit

breakers),

(5-jaw ringless meter sockets, two-pole circuit

breakers).

Incoming Service to Main Device 240/120 Vac,

3Ø4W Delta

Available outgoing feeder(s) to downstream

panelboards:

•

120/240 Vac, 1Ø3W (Fed from transformer’s “A-

Phase” and “C-Phase” only.) NOTE: Connection

to High-Leg “B-Phase” not permitted for this

service

(4-jaw ring type meter sockets, two-pole circuit

breakers)

(5-jaw ringless meter sockets, two-pole circuit

breakers)

Standard 3Ø IN/1Ø OUT branch units are not

suitable for use on this Delta System. Special

branch units are available for this System by

adding suffix: “CA” to catalog number (Typical

Examples: EZM313125CA, EZM313125XCA,

EZM313125CUXCA, EZM314225CA,

EZM314225XCA, EZM314225CUXCA,

EZM315225CA, EZM314225CUCA, etc.).

•

240/120 Vac, 3Ø4W Delta (7-jaw meter sockets,

three-pole circuit breakers).

Incoming Service to Main Device 208Y/120 Vac,

3Ø4W

Available outgoing feeder(s) to downstream

panelboards:

•

120/208 Vac, 1Ø3W (5-jaw meter sockets, two-

pole circuit breakers)

•

208Y/120 Vac, 3Ø4W (7-jaw meter sockets, three-

pole circuit breakers).

Main Devices

•

400, 600 and 800 A main disconnects may be end-mounted with branch units having

800 A or 1200 A continuous horizontal cross bus.

•

1000 and 1200 A main disconnect or terminal box must be center mounted when

used with branch devices with main bus rated 800 A continuous.

•

1600 A main disconnect or terminal box must be center mounted.

•

2000 A main disconnect must be center mounted and requires use of branch units

having 1200 A continuous horizontal cross bus.

•

400, 800 and 1200 A Type EZM-TBU terminal boxes supplied with lug landings to

meet EUSERC requirements.

Main Circuit Breaker ratings: 400, 600, 800, 1000, 1200, 1600 and 2000 A

Main Fusible Switch ratings: 400, 600, 800, and 1200 A (1Ø3W only)

Main Lugs Terminal Box ratings: 225, 400, 600, 800, 1200, 1600, and 2000 A

Branch Units

•

125 and 225 A residential branch units are available in ring type or ringless type

construction and are supplied with 800 A continuous aluminum horizontal cross bus

as standard (Example: EZM314125). For optional 1200 A continuous copper

horizontal cross bus with aluminum vertical connectors, add suffix “X” to catalog

number (Example: EZM314125X). For optional 1200 A continuous all-copper

bussing, add suffix “CUX” to catalog number (Example: EZM314125CUX). NOTE:

5-gang 225 A EZM, EZMR and EZMH residential branch units are supplied with

1200 A continuous Cross Bus as standard, do not add suffix “X” or “CUX” to these

units (Examples: EZMR315225 or EZMR315225CU). Plug-in style residential meter

sockets are available as ring type EZM without bypass, ringless type EZMR without

bypass, and ringless type EZMH with horn bypass.

Tenant circuit breakers must be ordered separately for these branch units. 125 A

max. units make use of Type QO, QO-VH or QO-H two-pole tenant circuit breakers

(40–125 A). 225 A max. units make use of Type QDP-TM, QBP-TM, QGP-TM and

QJP-TM two-pole tenant circuit breakers (70–225 A), and may also make use of two-

pole Type QO (40–125 A at 10 kA max.), two-pole Type QO-VH (40–60 A at 100 kA

max.), or two-pole Type QO-H (40–60 A at 100 kA max.) tenant circuit breakers.

•

225 A commercial branch units are available in ring type or ringless type

construction and are supplied with 1200 A copper horizontal cross bus with

aluminum vertical connectors as standard (Example: EZML314225). For optional

1200 A continuous all-copper bussing, add suffix “CU” to catalog number (Example:

EZML314225CU). Plug-in style commercial meter sockets are available as ring type

EZMT with test block bypass (meets EUSERC requirements), ringless type EZMR

without bypass, and ringless type EZML with lever bypass.

225 A max. units make use of type QDP-TM, QBP-TM, QGP-TM and QJP-TM two-

pole or three-pole tenant circuit breakers (70– 225 A), and may also make use of

two-pole type QO (40–125 A at 10 kA max.), two-pole type QO-VH (40–60 A at 100

kA max.), or two-pole type QO-H (40–60 A at 100 kA max.) tenant circuit breakers.

Note: QO, QO-VH and QO-H tenant circuit breakers used in 225 A branch units

require the use of adapter EZM125QOA (purchased separately).

•

400 A branch units are available in ringless type construction only, and are supplied

with 1200 A continuous all-copper bussing as standard (Example: EZML332400).

These branch units are supplied with factory-installed type LJL tenant circuit

breakers that have a field adjustable ampere rating trip setting from 125 A min. to

400 A max.

A tamper-evident seal kit is available where needed, order seal kit MICROTUSEAL

(refer to NEC 240-6 [c]). 400 A branch units are available as Type EZML with plug-in

style lever bypass type meter sockets, or Type EZMK with bolt-on style with manual

bypass type meter sockets.

•

Units having 800 A continuous horizontal cross bus WILL CONNECT with units

having 1200 A continuous horizontal cross bus.

•

Single phase units (three bus bars in horizontal cross bus) WILL NOT CONNECT

with three phase units (four bus bars in horizontal cross bus).

For Load Center Three-Tiered Series Ratings used downstream from Metering

Equipment, refer to Data Bulletins: 4100DB0301 and 2700DB9901.

METERING EQUIPMENT

5/15/2019