Floating neutral or wiring problem?

[Harry L]

[snip]

To get that to work, you need to learn to pray at precisely 77.7Hz (although some say 66.6Hz works just as well).

[snip]

[Rudy]

My neighbor had that problem in his 20 YO house.. One or more neutrals in his Service box were loose. He "lost" half of the appliances in his home: stove fridge and micro got "cooked". The "fix" was to tighten all the neutrals with a screwdriver