3 Phase Main Devices (Busway Side Tap)

Class 4162 / Refer to Catalog 4100CT0701

EZM Main with Busway Side Tap

EZ Meter-Pak™ metering equipment is available for use in high rise applications for connection to 800–5000 A I-Line^™ or I-Line II plug-in busway installed as a vertical riser. Three phase only EZM main devices in the form of a main circuit breaker or main fusible switch are available with an integral busway tap extending from the right or left side of the main device and phased to align with the busway for either neutral front or neutral back installations.

Busway Mains, 3Ø only (Indoor only) ordering instructions:

Step 1: Determine height to center line of busway plug-in opening, check local utility requirements for minimum and maximum meter socket heights.

Step 2: Determine side of EZM main section for busway tap to extend from (busway tap is an integral part of the main and extends to the left or right on the EZM device as viewed from the front).

Step 3: Check phasing of busway riser to insure that it matches phasing of busway tap on main section (indicated as neutral front or neutral back as viewed from the front).

Step 4: Select Cat. No. from tables below.

Step 5: Busway main devices are build to order specials and require 4 to 6 weeks for delivery.

EZM Busway Side Tap Mains Devices

Number Segment	Character	Description	EZM	3	800	CB	NF	BTR
Device Name	EZM	EZ Meter-Pak Meter Center
Service Feed	3	3Ph, 4W
Mains Rating	400 A
	600 A
	800 A
	1000 A
	1200 A
Main Type	CB	Main Circuit Breaker
	FS	Main Fusible Switch
	GB	Main Circuit Breaker (65 kAIC)
	JB	Main Circuit Breaker (100KAIC)
Neutral Position	NF	Neutral Front
	NB	Neutral Back
Bus Tap Location	BTL	Bus Tap Left
	BTR	Bus Tap Right

This table is for interpreting existing part numbers only. All possible combinations are not available.

1200 A EZM Mains with Busway Side Tap (Three Phase Only—Note positioning left or right below)

Ampere Rating	Width (in.)	Horizontal Cross Bus Rating	Busway to LEFT of EZM Metering Equipment Lineup		Busway to RIGHT of EZM Metering Equipment Lineup
Ampere Rating	Width (in.)	Horizontal Cross Bus Rating	Neutral Front	Neutral Back	Neutral Front	Neutral Back
Main Circuit Breaker with Busway Tap
65,000 RMS Symmetrical Amperes Maximum Short Circuit Current Rating
400	18.66	400 A	EZM3400CBNFBTL	EZM3400CBNBBTL	EZM3400CBNFBTR	EZM3400CBNBBTR
600	18.66	600 A	EZM3600CBNFBTL	EZM3600CBNBBTL	EZM3600CBNFBTR	EZM3600CBNBBTR
800	18.66	800 A	EZM3800CBNFBTL	EZM3800CBNBBTL	EZM3800CBNFBTR	EZM3800CBNBBTR
1000	18.66	1000 A	EZM31000CBNFBTL ^[1]	EZM31000CBNBBTL ^[1]	EZM31000CBNFBTR ^[1]	EZM31000CBNBBTR ^[1]
1200	23.36	1200 A	EZM31200GBNFBTL ^[1]	EZM31200GBNBBTL^[1]	EZM31200GBNFBTR ^[1]	EZM31200GBNBBTR ^[1]
Main Fusible Switch with Busway Tap Requires Class T (300 Vac) Fuses - Order Separately
100,000 RMS Symmetrical Amperes Maximum Short Circuit Current Rating
400	18.66	400 A	EZM3400FSNFBTL	EZM3400FSNBBTL	EZM3400FSNFBTR	EZM3400FSNBBTR
600	18.66	600 A	EZM3600FSNFBTL	EZM3600FSNBBTL	EZM3600FSNFBTR	EZM3600FSNBBTR
800	18.66	800 A	EZM3800FSNFBTL	EZM3800FSNBBTL	EZM3800FSNFBTR	EZM3800FSNBBTR
1200	22.36	1200 A	EZM31200FSNFBTL ^[1]	EZM31200FSNBBTL ^[1]	EZM31200FSNFBTR ^[1]	EZM31200FSNBBTR ^[1]

note

Dimensions shown position the centerline of top meter socket of a 125 A, 5-Gang or 6-Gang branch unit at 72" above floor level. Check with utility to meet local requirements.

Busway Transition Section

EZM busway transition section provides no overcurrent protection for the downstream EZM branch units.

Tenant main circuit breakers in these branch units must be selected as “fully rated” equipment. (Examples: QO for 10 kA, QO-VH for 22 kA or QOH for 42 kA.)

EZM Busway Transition Sections (3Ø only)

Ampere Rating	I-Line^™ Busway location	Neutral Front	Neutral Back	Width (in.)
1200	RIGHT of EZM Transition Section	EZM3BUSRF	EZM3BUSRB	12.00
1200	LEFT of EZM Transition Section	EZM3BUSLF	EZM3BUSLB	12.00

EZM Main with Center-Mounted Busway Tap

The EZM Main with center-mounted busway tap is a space-saving design for high rise applications that is installed as an integral component of the vertical riser busway and allows standard EZM branches to be mounted from both sides. See online digest updates for availability or contact your local field sales office for additional information

Section 2: Metering Equipment