3 Phase Branch Devices

Class 4162 / Refer to Catalog 4100CT0701

3 Phase Branch Devices—NEMA 3R Construction

Branch Units—3Ø Incoming and 1Ø Outgoing

System Type

Number of Meter Sockets

Horizontal Cross Bus Rating [1]
and Bus Bar Material

Ring Type 5-Jaw Meter Socket without Bypass[2]

Ringless Type 5-Jaw Meter Socket without Bypass

Ringless Type 5-Jaw Meter Socket with Horn Bypass

Ringless Type 5-Jaw Meter Socket with Lever Bypass

Cat. No

Width
(in.)

Cat. No

Width
(in.)

Cat. No

Width
(in.)

Cat. No

Width
(in.)

125 A Maximum (Order Type QO, QO-VH or QOH Circuit Breakers Separately) [3] [4]

3Ø4W

208Y/120 Vac

5-Jaw-Meter Socket

2P Branch
Circuit Breakers

3

800 A Al

EZM313125 [1]

12.25

EZMR313125 [1]

12.25

EZMH313125 [1]

12.25

EZML313125 [1]

15.56

800 A Al

EZM313125M10 [5]

1200 A Cu

EZM313125CUX

EZMR313125CUX

EZMH313125CUX

EZML313125CUX

4

800 A Al

EZM314125 [1]

EZMR314125 [1]

EZMH314125 [1]

EZML314125 [1]

800 A Al

EZM314125M10 [5]

1200 A Cu

EZM314125CUX

EZMR314125CUX

EZMH314125CUX

EZML314125CUX

5

800 A Al

EZM315125 [1]

EZMR315125 [1]

EZMH315125 [1]

EZML315125 [1]

800 A Al

EZM315125M10 [5]

1200 A Cu

EZM315125CUX

EZMR315125CUX

EZMH315125CUX

EZML315125CUX

6

800 A Al

EZM316125 [1]

EZMR316125 [1]

EZMH316125 [1]

EZML316125 [1]

800 A Al

EZM316125M10 [5]

1200 A Cu

EZM316125CUX

EZMR316125CUX

EZMH316125CUX

EZML316125CUX

225 A Maximum (Order Type QBP-TM, QDP-TM,QGP-TM or QJP-TM Circuit Breakers Separately) [6]

3Ø4W

208Y/120 Vac

5-Jaw-Meter Socket

2P Branch
Circuit Breakers

2

800 A Al

EZM312225 [1]

17.38

EZMR312225 [1]

17.38

EZMH312225 [1]

17.38

3

800 A Al

EZM313225 [1]

EZMR313225 [1]

EZMH313225 [1]

1200 A Cu

EZM313225CUX

EZMH313225CUX

4

800 A Al

EZM314225 [1]

EZMR314225 [1]

EZMH314225 [1]

1200 A Cu

EZM314225CUX

EZMR314225CUX

EZMH314225CUX

5

1200 A Al/Cu

EZM315225

EZMR315225

EZMH315225

1200 A Cu

EZM315225CU

EZMR315225CU

EZMH315225CU

6

1200 A Al/Cu

EZM316225

EZMR316225

EZMH316225

1200 A Cu

EZM316225CU

EZMR316225CU

EZMH316225CU

1200 A Al/Cu

EZM316225CA

EZMR316225CA

EZMH316225CA

Branch Units—225 A Maximum Commercial

 

System Type

Number of Meter Sockets

Horizontal Cross Bus Rating and Bus Bar Material

Ringless Type Meter Socket
without Bypass

Ringless Type Meter Socket
with Lever Bypass and Jaw Release

Ring Type Meter Socket with Test Block Bypass. Meets EUSERC Requirements

Cat. No.

Width (in.)

Cat. No.

Width (in.)

Cat. No.

Width (in.)

EZML313225

EZMT311225


EZMT311225

Without Cover

3Ø Incoming and 1Ø Outgoing [7] (Order Type QBP-TM, QDP-TM,QGP-TM or QJP-TM circuit breakers separately) [8]

3Ø4W

208Y/120 Vac

5-Jaw
Meter Sockets

2P
Branch
Circuit
Breakers

1

1200 A Al/Cu

EZMT311225 [9]

22.42

2

1200 A Al/Cu

EZML312225

19.44

EZMT312225 [9]

22.42

1200 A Cu

EZML312225CU

1200 A Al/Cu

EZML312225D [3]

3

1200 A Al/Cu

EZML313225

19.44

EZMT313225 [9] [10]

22.42

1200 A Al/Cu

EZML313225D [3]

4

1200 A Al/Cu

EZML314225

19.44

1200 A Cu

EZML314225CU

3Ø Incoming and 3Ø Outgoing (Order QBP-TM, QDP-TM, QGP-TM or QJP-TM circuit breakers separately, see [8]

3Ø4W

240/120 Vac
Delta

or
208Y/120 Vac

7-Jaw
Meter Socket

3P
Branch
Circuit
Breakers

1

1200 A Al/Cu

EZML331225

19.44

EZMT331225 [9]

22.42

1200 A Cu

EZML331225CU

1200 A Al/Cu

EZML331225D [3]

2

1200 A Al/Cu

EZMR332225

19.44

EZML332225

19.44

EZMT332225 [9]

22.42

1200 A Cu

EZML332225CU

1200 A Al/Cu

EZML332225D [3]

3

1200 A Al/Cu

EZMR333225

19.44

EZML333225

19.44

EZMT333225 [9] [10]

22.42

1200 A Cu

EZML333225CU

1200 A Al/Cu

EZML333225D [3]

4

1200 A Al/Cu

EZMR334225

19.44

EZML334225

19.44

1200 A Cu

EZMR334225CU

EZML334225CU

1200 A Al/Cu

EZML334225D [3]

Branch Units—400 A Maximum Commercial

System Type

Number of Meter Sockets

Horizontal Cross Bus Rating

Ringless Type Meter Socket with Lever Bypass and Jaw Release—Includes Factory-Installed 400 A Type LJL Circuit Breaker. [11], [12]

Ringless Type K Bolt-on Meter Socket with Manual Bypass—Includes Factory-Installed 400 A Type LJL Circuit Breaker. [12]

Cat. No.

Width (in.)

Cat. No.

Width (in.)

3Ø Incoming and 1Ø Outgoing [13]

3Ø4W 208Y/120 Vac
5-Jaw Meter Socket
2P Circuit Breakers

1

1200 A Cu

EZML311400

23.21

2

1200 A Cu

EZML312400

23.21

3Ø Incoming and 3Ø Outgoing

3Ø4W 240/120 Vac Delta
or 208Y/120 Vac
7-Jaw Meter Socket
3P Circuit Breakers

1

1200 A Cu

EZML331400

23.21

EZMK331400

27.56

2

1200 A Cu

EZML332400

23.21

EZMK332400

27.56

3Ø–1Ø OUT EZM Branch Unit Phase Balancing Flexibility

Starting Position

Possible Ending Position
(By moving only one “Z” connector)

AØ and BØ can be changed to AØ and CØ
AØ and CØ can be changed to AØ and BØ or BØ and CØ
BØ and CØ can be changed to AØ and CØ

The major benefit of factory phase balancing is that most jobs will not require field phase balancing. To see if meter socket phase balancing in the field is required, do the following (refer to wiring diagram for complete instructions):

A. Determine if the load in amperes on each phase of the transformer using handle rating of tenant circuit breakers installed at each number of meter sockets. Use Phase Balancing Chart to determine total number of connections each meter socket makes on each phase of transformer.

B. If phase balancing is required, determine which meter sockets should be changed to properly phase balance metering equipment lineup.

C. Once meter socket(s) is selected to be phase balanced, remove individual meter socket cover from each meter socket to be phase balanced. The vertical bus bars running top to bottom in the branch unit behind each meter socket are phased: AØ, BØ, CØ, left to right.

D. By moving only the line side meter socket “Z” shaped connectors per meter socket to be changed, phase balancing can easily be accomplished on-site:

Example: To change an AØ and CØ meter socket to a BØ and CØ socket

Starting Position
Meter Socket Phaseing: AØ and CØ

Step 2: Loosen hex nut from AØ line side meter socket jaw and slide “Z” connector down to free connector from stud.

Step 1: Remove hex nut from AØ line side connection to vertical bus.

Step 3: Rotate “Z” connector to right and align with stud on BØ vertical bus.

Step 4: Slide “Z” connector up to engage stud on BØ vertical bus. Torque hex nut of meter socket jaw to 75 lb-in (8 N•m).

Step 6: Replace hex nut (removed in Step 1) onto stud of BØ vertical bus and torque to 75 lb-in (9 N•m).

Phase balancing of meter socket is complete: BØ and CØ.

Footnotes

  1. For 1200 A main cross bus, add suffix “X” to catalog number. Example: EZMR313125X.. Allow 6 weeks for delivery.

  2. Snap-On aluminum sealing rings supplied as standard.
  3. Supplied with removable drip hood and equipped with an indoor top endwall with knockouts provided.
  4. Compatible with a branch terminal box accommodating a maximum conductor size of 300 kcmil when voltage drop calculations require sizes over 2/0, see Table 1.35: Accessories.
  5. Distance between meter sockets as measured from centerline to centerline is 10 inches.

  6. 2P Type QO (40–125 A, 10 kA max. meter center SCCR) or QO-VH and QO-H (40–60 A, 100 kA max. meter center SCCR) may be installed using EZM125QOA adapter kit, see Tenant Circuit Breakers.
  7. For 240/120 Vac Delta Systems add Suffix “CA” to catalog number (Example: EZM316125CA). All meter sockets are phased A and C only. Price remains the same as the base catalog number. Order only branch units, not stocked in PDS (6-week delivery).
  8. 2P Type QO (40–125 A, 10 kA max. meter center SCCR) or QO-VH and QO-H (40–60 A, 100 kA max. meter center SCCR) may be installed using EZM125QOA adapter kit, refer to Accessories.
  9. Supplied with bondable neutral, suitable for use as service equipment. Use main lugs terminal box type EZM-TBU for Six Disconnect Rule applications to feed this device. Supplied with copper horizontal bus bars and aluminum vertical bus bars.

  10. Does not meet EUSERC 48 in. minImum / 75 in. maximum meter height requirements for outdoor installations. The bottom meter socket is 37 inches above ground when the device is mounted with the top meter socket at 75 inches above ground. EUSERC indoor requirements are 36 in. minimum / 75 in. maximum.

    For 400 A maximum Commercial Branch Units, see Branch Units—400 A Maximum Commercial .

  11. Supplied with Class 320 lever bypass meter socket. Use anti-inversion clip kit, catalog number MMLRK, if required. See Tenant Circuit Breakers and EZM Accessories.
  12. LJL circuit breaker has adjustable trip settings from 125-400 A. Use seal kit MICROTUSEAL, if required. LJL circuit breaker terminal lug kit factory-installed and accommodates (2) 2/0-500 kcmil Cu-Al per phase. Alternate lug kit AL400L61K3 for LJL circuit breaker is available, see Tenant Circuit Breakers and EZM Accessories.
  13. For 240/120 Vac Delta Systems add Suffix “CA” to catalog number (Example: EZML311400CA). All meter sockets are phased A and C only. Price remains the same as the base catalog number. “Order only” branch units, not stocked in PDS (4–6 week delivery). Order point Lexington.

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