I use a high rated UPS on a dedicated 20 ampere branch circuit for
all of our instruments and have not needed any other protection since
the UPS regulates the flow.

We had a power outage here at Lake Tahoe that started December 31st
and lasted for four days.  I used my 3000 watt Honda generator equipped
with an inverter (trade named cyclo-converter) and everything worked
well.  I added the above in case anyone lives in an area where there
are frequent power outages.  Make certain that any generator you
purchase has an inverter for stabilized power (frequency).

Ray Bauer
Tahoe City, California -- with two feet of new snow.