I have a residential customer, a married couple in their 40s who are hearing impaired. Very nice people. They have aluminum NM cable throughout which wasn't noted on the home inspection report(hack #1) when they bought their house 3 years ago. I went to change a malfunctioning exterior fixture today. Vinyl siding, no outlet box, fixture strap screwed to the vinyl(hack #2). Oddly, although the switch leg was 12/2 aluminum, the NM cable at the fixture was 14/3 copper. Found aluminum switch leg in attic. It disappears down the wall and magically reappears as copper, which would explain the intermittent operation of the fixture (hack #3). Also found several CU-only devices and a melted wirenut in a j-box splice (copper to aluminum)on a previous visit(hacks #4 & 5?). These folks need to install special, low frequency smoke detectors for the hearing impaired, and have the whole house checked over, or better yet, move!
Interesting the "hidden" junctions between different types of cables.
I struck once a house which was sold as been rewired. yeh yeh, the cables from the fuse panel were all new TPS up to under the roof. then a row of stripconnectors and terminated in the old VIR and TRS cables.
I was called out to investigate intermittend flickering lights.
Whoever had done this job should loose its electrical registration if it was an electrician or a cowboy. (
Of course I quoted for a full rewire and the job was brought up to a safe standard
It's interesting that in the USA Aluminium is used a lot in house wiring, considering the relative high currents drawn by appliances at 110 Volts.
I have this not seen in New Zealand, and all cable here is made in copper for house wiring.
Streetcables are copper or aluminium here as are distribution transformer windings.
The product of rotation, excitation and flux produces electricty.
I did one place where I needed to pull back a cable running to an outlet. Nothing looked wrong at the receptacle; it was just a conventional 7/.029 T&E (Romex-like). The only problem is, when I started tugging on the cables in the attic I found the top end of it was a 7/.052, or some other much larger cable.
In the end, I found a splice about halfway up the wall and directly above the socket, all buried under plaster in a box of the type we normally use for our "cooker" (range) panels.
It looked like somebody had removed the old range switch and outlet, then just chanelled down to fit a socket below and spliced the smaller cable in the old box. They'd then just stuffed a piece of drywall loosely into the box and plastered over it.
Let you know that i am hard of hearing electrician here also but for smoke alarm the most common one i useally installed is the strobe light verison it can be stand alone or interconnected verison. they are not cheap btw but it worth every cent.
Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)