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Adventures in Half-House Electricity

SilverAlex

New member
Joined
Aug 26, 2020
Messages
2
Location
Northern Virginia
Long-time lurker, first time poster, yadda yadda yadda.

Years ago, the neighbors had an outdoor security light installed by Dominion, mounted on the pole and connected directly to the line and not through the house panel. The new owners decided they didn’t want it, and had the power company come out to disconnect it. OK, fine so far.

To remove it, the lineman apparently decided to temporarily disconnect the 110 circuit it was attached to, which is also one of the two circuits feeding my house. The problem is, no one bothered to tell me, and I started to investigate why half the power in the house had gone out.

Which included starting the dryer, to see if it worked. Which it sort of did, presumably since 110 is enough to run the motor, but not the heat. And turning it on also backfed the de-energized half of the house, resulting in the lights that had gone out flickering back on.

Guessing what was going on, I went outside to make sure I hadn’t just killed someone. Good news: I hadn’t. Indeed, the lineman parked out of sight didn’t seem terribly concerned when I mentioned the issue.

However, am I right in thinking that he was taking some dangerous risks, since the disconnected circuit could actually have been live, thanks to me? Or is this really standard procedure if a 110 circuit needs work?
 
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klassenl

Well-known member
Joined
Feb 20, 2016
Messages
716
Location
Southern Alberta
Electricity is inherently "dangerous".

Electrical utility workers have no qualms about working on 120v-to-ground considering they live in close contact with much much higher voltages.
 
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ripperd

Well-known member
Joined
Jul 2, 2014
Messages
2,057
Location
Twin Cities, MN
Linemen generally do a large amount of "hot work" (ie work with energized lines). I'm pretty sure they treat all lines as live whether off or not unless they have a section where they can do true lockout/tagout. That way they use the same procedure every time and working safely stays second nature.
 

wyliesdiesels

Well-known member
Joined
Aug 14, 2012
Messages
20,219
Location
Modesto, CA
The live wire isnt an issue.

Having a load across that wire can be an issue for arc flash. On 120v though, its minimal.
 
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