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B–2 445-0089-01-01
Residential Backup System
Figure B-1 illustrates a typical residential backup system with the following
features:
1. AC power supplied by a utility system
2. DC power supplied by a battery bank and protected by a DC fuse in the
positive cable
3. An AC source panel that includes a Max 30A circuit breaker that supplies the
PROsine
4. An AC load panel with branch circuit breakers that supply only loads that run
off the PROsine
5. An earth ground
Figure B-1
Residential Backup System
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DC fuse /
disconnect or
circuit breaker
AC Load Panel
AC Source Panel