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EZ Meter-Pak® Meter Centers

Selection Information

Class 4141

●	Review local utility requirements to ensure that metering equipment meets their standards.

●	Check local utility to determine available fault current at the meter center.

●	Using the SCCR table:

■	Select meter center configuration, main lugs only (Six Disconnect Rule), or remote main, main circuit breaker, or main fusible switch.

■	Read down to select SCCR equal to, or greater than desired rating.

■	Read across to select branch unit tenant circuit breaker type.

■	Continue reading across to select EZM main device type.

●	Turn to appropriate selection/pricing pages to determine catalog numbers for main device, branch units, and tenant circuit breakers to complete meter center.

Table 2.12:

UL Listed Meter Center Short Circuit Current Ratings (SCCR) Tenant breakers of same frame size having higher AIR values may replace tenant breakers as listed in tables below and maintain the series rating.

Figures	Short Circuit Current Rating (240 Vac Maximum)ab	EZM Meter Center Overcurrent Protection Devices
		EZM Branch Unit Tenant Circuit Breaker Types Available (Branch Unit Amperes max., Number of Poles, Tenant Circuit Breaker Amperes Rating Range)	EZM Main Device with Integral Mounted Main, Remote Mounted Main or without an Upstream Mounted Main (Six Disconnect Rule)
	EZ Meter-Pak (Six Disconnect Rule Applications)—See Figure 1
	10 kA	QO (125 A, 2P, 40–125 A)	225–1600 A Main Lugs Terminal Box (Tenant Circuit Breakers used as Service Disconnects—6 maximum)
		QO (225 A, 2P, 40–125 A)d
		QB (225 A, 2P or 3P, 70–225 A)
	22 kA	QO-VH (125 A, 2P, 40–125 A )
		QO-VH (225 A, 2P, 40–60 A)d
	25 kA	QD (225 A, 2P or 3P, 70–225 A)
	42 kA	QOH (125 A, 2P, 40–125 A)
		QOH (225 A, 2P, 40–60 A)d
	65 kA	QG (225 A, 2P or 3P, 70–225 A)
	100 kA	QJ (225 A, 2P or 3P, 70–225 A) c
		DJM (400 A, 2P or 3P, 160–400 A)ec
	EZ Meter-Pak—Main Lugs Terminal Box Applications Protected By Remote Main—See Figure 2
	10 kA	QO (125 A, 2P, 40–125 A)	225–1600 A Main Lugs Terminal Box Must be protected by an upstream disconnecting means rated 10 k AIR minimum
		QO (225 A, 2P, 40–125 A)d
		QB (225 A 2P or 3P, 70–225 A)
		DJM (400 A, 2P or 3P 160–400 A)e
	22 kA	QO-VH (125 A, 2P, 40–125 A)	225–1600 A Main Lugs Terminal Box must be protected by an upstream disconnecting means rated 22 k AIR minimum
		QO-VH (225 A, 2P, 40–60 A)d
		DJM (400 A, 2P or 3P, 160–400 A)e
	25 kA	QD (225 A 2P or 3P, 70–225 A)	225–1600 A Main Lugs Terminal Box must be protected by an upstream disconnecting means rated 25 k AIR minimum
		DJM (400 A, 2P or 3P, 160–400 A)e
	42 kA	QOH (125 A, 2P, 40–125 A)	225–1600 A Main Lugs Terminal Box must be protected by an upstream disconnecting means rated 42 k AIR minimum
		QOH (225 A, 2P, 40–60 A)d
		DJM (400 A, 2P or 3P, 160–400 A)e
		QO-VH (125 A, 2P, 40–125 A)	225–1600 A Main Lugs Terminal Box must be protected by a Square D circuit breaker Type LA (400 A max.) or MA (1000 A max.) Rated 42 k AIR minimum
		QO-VH (225 A, 2P, 40–60 A)d
		QD (225 A 2P or 3P, 70–225 A)
	65 kA	QG (225 A 2P or 3P, 70–225 A)	225–1600 A Main Lugs Terminal Box must be protected by an upstream disconnecting means rated 65 k AIR minimum
		DJM (400 A, 2P or 3P, 160–400 A)e
		QO-VH (125 A, 2P, 40–125 A)	225–1600 A Main Lugs Terminal Box must be protected by a Square D circuit breaker Type LH (400 A max.), MH (1000 A max.) or PA (1600 A max.) rated 65 k AIR minimum
		QO-VH (225 A, 2P, 40–60 A)d
		QD (225 A 2P or 3P, 70–225 A)
		QD (225 A 2P or 3P, 70–225 A)	225–1600 A Main Lugs Terminal Box must be protected by a Square D circuit breaker Type MG (800 A max.), PG (1200 A max.) or RG (1600 A max.) rated 65 k AIR minimum
	100 kA	QJ (225 A 2P or 3P, 70–225 A )c	225–1600 A Main Lugs Terminal Box must be protected by an upstream disconnecting means rated 100 k AIR minimum
		DJM (400 A 2P or 3P, 160–400 A)ec
		QO-VH (125 A, 2P, 40–125 A)	Must be protected by an upstream disconnection means with Class R (600 A max.), or Class T (300 Vac, 800 A maximum) fuses.
		QO-VH (225 A, 2P, 40–60 A)d
		QD (225 A 2P only, 70–225 A)	Must be protected by an upstream disconnection means with Class J (600 A max.), Class L (1200 A max.), Class R (600 A max.), Class T (300 Vac, 1200 A max.) or Class T (600 Vac, 800 A maximum) fuses. Or be protected by a Square D circuit breaker Type MJ (800 A max.), PJ (1200 A max.), PH (1600 A max.) or RJ (1600 A max.) rated 100 k AIR minimum.
		QD (225 A 3P only, 70–225 A)c
	EZ Meter-Pak—Main Circuit Breaker Applications—See Figure 3
	10 kA	QO (125 A, 2P, 40–125 A)	400–1600 A EZM Main Device with Type LH (400 A Max.), MH (1000 A max.) or PA (1600 A max.) circuit breaker.
		QO (225 A, 2P, 40–125 A)d
		QB (225 A 2P or 3P, 70–225 A)
	65 kA	QO-VH (125 A, 2P, 40–125 A)
		QO-VH (225 A, 2P, 40–60 A)d
		QD (225 A 2P or 3P, 70–225 A)
		DJM (400 A, 2P or 3P, 160–400 A)e
	65 kA	QD (225 A, 3P, 70–225 A)	1000–1200 A Main Device with catalog number suffix "CBU" supplied with Type MHF circuit breaker.
	100 kA	QO-VH (125 A, 2P, 40–125 A)
		QO-VH (225 A, 2P, 40–60 A)d
		QD (225 A 2P only, 70–225 A)
		QD (225 A 3P only, 70–225 A)c
		DJM (400 A, 2P or 3P, 160–400 A)ec
		QD (225 A 2P only, 70–225 A)	2000 A EZM Main Device with Type RJ (2000 A) circuit breaker
		QD (225 A 3P only, 70–225 A)c
		DJM (400 A 2P or 3P, 160–400 A)ec
	EZ Meter-Pak—Main Fusible Switch Applications—See Figure 3
	10 kA	QO (125 A, 2P, 40–125 A)	400–800 A EZM Main Device (1Ø or 3Ø) with Class T (300 Vac) fuses installed. 1200 A EZM Main Device (1Ø only) with Class T (300 Vac) fuses installed.
		QO (225 A, 2P, 40–125 A)d
		QB (225 A 2P or 3P, 70–225 A)
	42 kA	QO-VH (125 A, 2P, 40–125 A)	1200 A EZM Main Device (1Ø only) with Class T (300 Vac) fuses installed.
		QO-VH (225 A, 2P, 40–60 A)d
	100 kA	DJM (400 A, 2P, 160–400 A)e
		QD (225 A 2P, 70–225 A)
	100 kA	QO-VH (125 A, 2P, 40–125 A)	400–800 A EZM Main Device (1Ø or 3Ø) with Class T (300 Vac) fuses installed.
		QO-VH (225 A, 2P, 40–60 A)d
		QD (225 A 2P, only, 70–225 A)
		QD (225 A 3P only, 70–225 A)c
		DJM (400 A, 2P or 3P, 160–400 A)ec
a Meter center short circuit current rating is equal to the lowest short circuit current rating given in table for any circuit breaker installed in any meter panelboard in the meter center. b Short circuit current rating is measured at the LINE SIDE terminals of the integral mounted or remote mounted main providing overcurrent protection for the EZM metering equipment lineup. c 3P only tenant circuit breaker(s) are limited to 208Y/120 Vac maximum. d Requires use of EZM125QOA adapter (order separately). Refer to page 2-15 for pricing. e Supplied with factory installed circuit breaker(s), with an adjustable trip range of 160–400 A.   For three-tier series ratings refer to Data Bulletin 4100DB0301 and Instruction Bulletin 80043-303-19.