Okay, I'm going to pipe up on one thing. Stop and ask yourself one question!
"Do I have a disconnect switch on every powered device that has current applied when not in operation, but is running electronics for low level function ?"
This question applies to devices that lack a mechanical switch (vs. a relay), such as: microwave, alarm clock, television, refrigerator, washer/dryer, CPAP, cordless phone, garage door opener, thermostat, etc...
Barring those industrial level items that use 440V, all of the above work with 120-220VAC. Which will start a fire with just as much vigor as anything, in addition to being able to kill you dead if you mess with it in ways you shouldn't.
Stop and breathe, we live in a world where we are surrounded by electrons in a holding pattern waiting to do our bidding (Thank you Nikola Tesla!). Just because it is attached to a big hunk of iron does not inherently pose a greater risk than we unknowingly subject ourselves to in our homes. I fully agree that a master switch to kill main power to a given area is a wise thing, but the fact that a device has power present when in the OFF position is not grounds for fear.
Rant concluded...
now back to our normal HM programming.
Thanks
Mark