BuyLog Flippingbook NOV 2025

METERING, BUYLOG SECTION 2

2-58

— ReliaMod™ Where Center-Feeding Main Modules is Required

Suitable for Center-Feed Applications only Horizontal bus is rated 1200 amps maximum. The load on the horizontal bus may not exceed 1200 amps in either direction from the point of connection of the main circuit breaker. Overall load is limited to the rating of the main circuit breaker.

For applications where the main module ampere rating is greater than that of the meter stack horizontal bus, the main module must be placed in the middle of the lineup (Figure A.) The engineer of record must provide calculations on the plans to show that the horizontal bussing will not be overloaded on either side. This situation, called "Center-Feeding", can happen in either 800A or 1200A horizontal bus meter stack applications, depending on the main ampere rating. Refer to chart below for amperage and bus information. Note: Figure B shows the incorrect calculations.

Does the Application Require Electrician to Center-Feed the Main Module? Amps of Main Breaker, Lug or Switch 800A Horizontal Bus

1200 Horizontal Bus

400A - 800A

No

No No No

1000A 1200A 1400A 1600A 2000A

Yes Yes Yes Yes N/A

Yes Yes Yes