Well, old age has finally set in...I had a major senior moment yesterday that could have ended up badly.
I was wiring up a Homeline 6/12 subpanel in my "utility" room to power up my Lighting dimmer system and all of the whole-house electronics. The currently connected loads are one receptacle for the UPS supplying my internet modem and routers and phone system. The other circuit is a temp running into the kitchen for my front load washer. I hadn't wired in any of the dimmer packs or other electronics yet.
Well, I managed to land one leg on the neutral bus and the neutral on one of the breaker bus lugs.

Without checking I turned on both circuits....plugged in my UPS and got a "Building Wiring Fault" warning light....WTF? Only after staring at the panel for a minute or so did I realize the mistake. Somehow, despite getting 240 volts the UPS and connected equipment survived. (I still can't figure out how, I am sure that the breaker placement in that case made for 240v on that receptacle.)
As for the washer, I had unplugged it (but left the surge protector and the cat's water dish plugged in), so I went into the kitchen expecting to find both the surge protector and water dish smoking. But both were ok..because my error simply reversed hot and neutral ....thanks to the breaker placement.
Needless to say in wiring the dimmer pack I have been double and triple-checking everything...it will be powered up later today.
I'll post pics of the panel and dimmer pack, etc. later in this thread.
I was wiring up a Homeline 6/12 subpanel in my "utility" room to power up my Lighting dimmer system and all of the whole-house electronics. The currently connected loads are one receptacle for the UPS supplying my internet modem and routers and phone system. The other circuit is a temp running into the kitchen for my front load washer. I hadn't wired in any of the dimmer packs or other electronics yet.
Well, I managed to land one leg on the neutral bus and the neutral on one of the breaker bus lugs.
Without checking I turned on both circuits....plugged in my UPS and got a "Building Wiring Fault" warning light....WTF? Only after staring at the panel for a minute or so did I realize the mistake. Somehow, despite getting 240 volts the UPS and connected equipment survived. (I still can't figure out how, I am sure that the breaker placement in that case made for 240v on that receptacle.)
As for the washer, I had unplugged it (but left the surge protector and the cat's water dish plugged in), so I went into the kitchen expecting to find both the surge protector and water dish smoking. But both were ok..because my error simply reversed hot and neutral ....thanks to the breaker placement.
Needless to say in wiring the dimmer pack I have been double and triple-checking everything...it will be powered up later today.
I'll post pics of the panel and dimmer pack, etc. later in this thread.