Grid Tie in Tucson Az

[inetdog]

One thing that I think has not been addressed yet is that at least one circuit in the lower left portions of the panel, using dual breakers, may be a MultiWire Branch Circuit (MWBC) with a red wire, black wire, and possibly a common neutral. If all you do is move the half size breakers up one position to fill in the blank, then you would end up feeding the black and the red wire from the same L connection. This will double the maximum current on the shared neutral, causing as fire hazard and a code violation.
An electrician can tell you how to rearrange the half sized breakers to make sure that this does not happen.

[posplayr]

One thing that I think has not been addressed yet is that at least one circuit in the lower left portions of the panel, using dual breakers, may be a MultiWire Branch Circuit (MWBC) with a red wire, black wire, and possibly a common neutral. If all you do is move the half size breakers up one position to fill in the blank, then you would end up feeding the black and the red wire from the same L connection. This will double the maximum current on the shared neutral, causing as fire hazard and a code violation.
An electrician can tell you how to rearrange the half sized breakers to make sure that this does not happen.

Thanks I'll check into that. Last night I just realized how bad that straddling breaker is. Unless both it and the house main are off the lower panel will still have power. Not good.

[foo1bar]

Last night I just realized how bad that straddling breaker is. Unless both it and the house main are off the lower panel will still have power. Not good.

It may/may not have power - the straddling breaker (and therefore the panel in the shed) will have 1 side live and the other side floating if the 60A feeding the lower is off.
So only if/when you have a 220V load connecting the two sides in your shed would you have the lower bus having voltage. (and that 220V load probably would be unhappy - it'd be seeing some weird voltages, since that side would not be driven by the POCO.)

[posplayr]

It may/may not have power - the straddling breaker (and therefore the panel in the shed) will have 1 side live and the other side floating if the 60A feeding the lower is off.
So only if/when you have a 220V load connecting the two sides in your shed would you have the lower bus having voltage. (and that 220V load probably would be unhappy - it'd be seeing some weird voltages, since that side would not be driven by the POCO.)

Well I wont be using my tongue to find out.