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Forum topic by Karda posted 10-15-2018 04:21 PM 273 views 0 times favorited 7 replies Add to Favorites Watch
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Karda

1303 posts in 723 days


10-15-2018 04:21 PM

Hi, I have to change a low voltage trance former. It is wired to a line coming from the wall switch. Being the wimp I am I usually turn the house current of but is in necessary since I can turn the switch of and I won’t be touching the switch Logic says if the switch is off it would be ok but I flunked logic what do you think thanks Mike


7 replies so far

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squazo

109 posts in 1815 days


#1 posted 10-15-2018 04:49 PM

you could check it with a volt meter.

But you should kill the breaker anyways, Ive got a friend who got hit with 20 thousand volts and almost died.

120 can kill you too.

The switch could fail

Somebody could turn it on.

a bug could get in there and connect the contacts (this has happened and I have had to deal with the resultant fire)

It could have a secondary means of power

Just too many ways to get hurt.

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JohnMcClure

264 posts in 810 days


#2 posted 10-15-2018 05:20 PM

Agreed. Kill power at a breaker, then check for dead with a meter. If you cant do that, get a pro.

-- I'd rather be a hammer than a nail

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William Shelley

592 posts in 1639 days


#3 posted 10-15-2018 09:56 PM

I’m super paranoid, I always test my volt meter against a known live circuit before confirming that another circuit is dead. I wouldn’t want to end up on the floor because of a malfunction in a $15 tool.

That being said, electricity is dangerous but if you know the rules and pay attention, you shouldn’t have any accidents. I’ve done work in my main panel live before because I didn’t want to turn off the computer servers I run.

-- Woodworking from an engineer's perspective

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verdesardog

171 posts in 2781 days


#4 posted 10-15-2018 10:50 PM

Trance former, that’s a new one on me. New age electronics?? LOL

Most likely transformer I guess. what is it conncted to that has a switch? You never know if the installer was qualified to do the wiring, I would check for voltage before doing anything with it.

-- .. heyoka ..

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Karda

1303 posts in 723 days


#5 posted 10-15-2018 10:56 PM

ok thanks I can turn it off

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lumbering_on

554 posts in 659 days


#6 posted 10-15-2018 11:26 PM

Standing on a plastic stool with rubber soled work boots and keeping one hand behind your back will prevent any issues. But a voltage meter usually suffices.

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lumbering_on

554 posts in 659 days


#7 posted 10-15-2018 11:26 PM

Double post

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