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1) Are you installing an Interlock kit on the panel to kill and isolate power at the main breaker or are you installing a transfer switch?
Thanks for the confirmation.
1) Since installing a transfer switch, the 30 amp double pole breaker can be located in any left or right hand available 2 slots on the panel. You need a double pole breaker that has a common trip handle.
If using 2 separate full size 30 amp single pole breakers, then you will require a common trip handle tie to simultaneously kill power to both breakers. The most common installation for this is to use a full size 30 amp double pole breaker which has a built-in common trip handle.
The double pole breaker or the 2 single pole breakers need to land on opposite phases at the hot bus bar. Install a full size double pole breaker and it will automatically land on 2 separate phases in the panel.
Not sure what you mean by top or bottom terminals? There is only 1 screw per each side of the breaker to terminate the hot wires?
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