Does anyone make a 100A, 125A, 150A, or 200A service panel that uses
breakers for the circuits but has fusible pull-outs for the mains? I've
been looking at Square-D's catalog, but I don't see anything like that.
I don't need one; I'm just curious. It would be great for being
absolutely certain that you were not still connected to the grid if you
needed to backfeed with a generator during an extended power outage.
You wouldn't need a transfer switch; pulling out the main fuses would be
a positive mechanical disconnect.
That a transfer panel needs to be foolproof, because lives depend on it.
Reasonably priced transfer panels exist, they use a mechanical
interlock, that makes the transfer foolproof, in that you can not forget
to disconnect the mains.
Yes, better fools are being invented all the time, thus the usage of a
method that makes it impossible to screw up.
You could always do that in a separate box.
The problem with using that to isolate yourself from
the grid INSTEAD of a transfer switch is that it's
still possible for a bone-head to forget that step,
and fire up the generator with the main still in.
The point of a transfer switch is that, barring a
strange mechanical failure, it's not possible to
connect the generator to the grid, it's either/or.
Which is more likely to get it wrong,
the person running the system, or the transfer switch?
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