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5. As with any product, design changes can occur over time, so
always refer to the schematics in the transfer switch Owner’s
Manual for the required connections and safety precautions.
6. The transfer switch being used is an open transition switch.
Open transition switches prevent electrical feedback between
the generator and the utility by only allowing load circuits to
be connected to one power supply at a time.
SELECTED CIRCUIT COVERAGE
1. The generator powers only designated circuits that are grouped
together and wired into a separate priority distribution panel.
The transfer switch is installed between the main distribution
panel and the priority panel.
The amperage rating of the transfer switch must be equal to
or greater than the highest amperage rating of the utility and
generator breakers feeding the switch.
WHOLE-HOUSE CIRCUIT COVERAGE
1. The generator will be backing up all electrical loads within the
panel, so the amperage rating of the transfer switch must be
equal to or greater than the amperage rating of the normal
utility service.
Unless a service rated transfer switch is used, a main service
disconnect must be located before the transfer switch. The
transfer switch must be installed between the utility service
entrance and the building distribution panel.
2. A service rated transfer switch is installed between the
service and the main distribution panel. The service rated
switch becomes the main service so no service disconnect is
needed. The existing main distribution panel becomes a sub-
panel.
Appendix B
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