When must an EZM Main Device be Center Mounted within a Meter Center lineup?
Connection of EZM equipment requires center mounting of the main device.
One function of an EZM Main is to provide overcurrent protection for the connecting EZM Branch units. EZM Branch units are built standard with either 800A continuous or 1200A continuous horizontal cross bus. EZM Branch units having 800A cross bus, may be upgraded to 1200A cross bus by adding suffix ``X`` to the catalog number (Example: EZM314125X). EZ Meter-Pak Metering Equipment in UL Listed (File: E-131840 as Modular-Panelboards) and part of this UL Listing included the Center Mounting issue associated with EZM Mains as follows: 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.