Wiring Discoveries In An Old House

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Jul 7, 2014
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Winnipeg MB CA
Our friends' daughter bought a house a few weeks ago, and her dad asked if I'd change out the old light fixtures, switches, and receptacles. Of course, no problem.

But wow, are we ever finding some weird stuff.

The original plaster-and-lath walls have been covered with drywall, and, on at least one outside wall, there's also a layer of a soft fibrous sheathing under the drywall.

In a few cases they've added an electrical box just by cutting a hole in the wall and using wood screws in hopes of hitting the lath. Blah!

In another case they ran a 3-conductor cable off a ganged double breaker to a kitchen receptacle, but didn't split the receptacle. But that didn't trip the breaker, because one of the conductors is dead. There must be an intermediate connection missing. Oy ...

But here's the best one so far ... at some point someone enlarged the doorway into the kitchen, and relocated the cables creatively:

20250318_182205.webp

They were embedded in the cement for the old ceramic floor tiles.

And how did they enter the wall?
20250318_200258.webp

They were run up the outside stud a ways before entering the wall cavity, and covered with drywall and lots of mud.

Inside the wall cavity, they were spliced to cables running up to switches, in an octagon box floating in free space, dangling from the cables.

20250318_193552.webp

Bonus: The two cables are on separate circuits - so turning off the one breaker does not kill everything in the junction box, nor at the two switches above, which are in a double rectangular box.

It's been interesting for sure.
 
With things like that it is a wonder more houses don't burn. I had one instance where a well tank was wired improperly and to touch it could kill you. The tank was hot and energized. Was told it was wired by and electrician 7 years prior.
I have seen 230 volts run in a wall and than split off to provide 120v.
Had a pump once wired from 2 different circuits.
Hot grounds.
Crazy stuff out there.

Lucky I never got killed.
 
Nothing like unpermitted work. We should not be surprised by the human propensity to perform hack repairs. I'm sure all the "get off my lawn folk" will try to pull the old "my property I can do what I want, permits are a scam, blah blah blah."
 
Sad thing is some of the things such as the hot well tank was permitted and inspected under new construction.

Things can get missed.
 
Nothing like unpermitted work. We should not be surprised by the human propensity to perform hack repairs. I'm sure all the "get off my lawn folk" will try to pull the old "my property I can do what I want, permits are a scam, blah blah blah."
What? You really trying to go political and attack an entire generation?

Awesome!
 
Our 1953 house had lots of shady electrical when we bought it. My favorite was the fan/light combo above our basement shower. It was ungrounded (of course), not protected by GFCI (eh, who needs it?), and they switched the neutral instead of the hot for the fixture, meaning that there was always potential. Perfect!

There was also an outlet in the living room that was fed by what looked like old coax wire. It had already been chopped and abandoned in the basement ceiling when we bought the place.
 
Our 1953 house had lots of shady electrical when we bought it. My favorite was the fan/light combo above our basement shower. It was ungrounded (of course), not protected by GFCI (eh, who needs it?), and they switched the neutral instead of the hot for the fixture, meaning that there was always potential. Perfect!

There was also an outlet in the living room that was fed by what looked like old coax wire. It had already been chopped and abandoned in the basement ceiling when we bought the place.
The reason I always recommend people buy, read and use Wiring Simplified is so they can understand the why of wiring. No one who understands will ever switch the neutral instead of the hot wire. By the same token, understanding will make sure they do not wire an outlet backwards. If you do not understand what I wrote, buy and read Wiring Simplified.
 
Nothing like unpermitted work. We should not be surprised by the human propensity to perform hack repairs.
Everyone thinks they're an expert.

I find my wife's mental health profession colleagues all think they're qualified to have opinions on every subject under the sun when in fact they're pretty ignorant except in a very narrow field.
 
What? You really trying to go political and attack an entire generation?

Awesome!
Everyone thinks they're an expert.

I find my wife's mental health profession colleagues all think they're qualified to have opinions on every subject under the sun when in fact they're pretty ignorant except in a very narrow field.

I never mentioned a generation nor is this political. There's the right and the wrong way to do things. People make all sorts of justifications for doing it the wrong way. Unpermitted garage conversions, unpermitted basement conversions into accessory units where occupants can only exit the basement via stairs to the upper floor. I used to see this stuff all the time.

Back in 2007 I saw a house in Tuscaloosa Alabama. It was a 1950/60's ranch where the owner cut a slot along the roof line and placed a single-wide mobile home in the slot. Yes, the owner dropped in a single-wide mobile home. They cut a hole in the steel floor and added a spiral staircase down into the interior of house along with "exterior" porch/stairs leading to the mobile home. It was the craziest thing and the owner wanted to get a cash out for "improvements". I'm sure they were renting it to some poor students.

Around that time I saw another house where the owners dropped a wood burning stove in the bed of a pickup sitting in the backyard and ran piping into the basement of the house to heat the house. Morons.
 
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Claims is an old house, but picture of wiring shows romex and OSB. It's not particularly old.
The house is thought to be about 100 years old. That's consistent with the inner-city neighbourhood it's located in.

@ripcord is correct - the bad wiring is due to renovations over the succeeding decades, and has apparently been done by different people; some stuff is extremely bad, and some is done very well.

One added receptacle was fed with aluminum wire, which was prevalent here in the 1970s. It's the only instance of aluminum I've found so far.

It's a real mishmash.
 
The house is thought to be about 100 years old. That's consistent with the inner-city neighbourhood it's located in.

@ripcord is correct - the bad wiring is due to renovations over the succeeding decades, and has apparently been done by different people; some stuff is extremely bad, and some is done very well.

One added receptacle was fed with aluminum wire, which was prevalent here in the 1970s. It's the only instance of aluminum I've found so far.

It's a real mishmash.
Are you going to be able to replace the aluminum wires? If not, I've seen some specialty connectors that are purpose made to allow you to pigtail aluminum to copper working so you can safely connect to modern outlets.
 
The reason I always recommend people buy, read and use Wiring Simplified is so they can understand the why of wiring. No one who understands will ever switch the neutral instead of the hot wire. By the same token, understanding will make sure they do not wire an outlet backwards. If you do not understand what I wrote, buy and read Wiring Simplified.
I have the 2017 version. I think there is a 2020 or 2022 version out now. Great book. Highly recommended.
 
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