Buying 2 wire romex

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jamesguy10

jamesguy10

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Location
Amsterdam NY
Today i went to a local hardware store.
I bought a box of asphault covered 12gauge 2 wire w/o ground.
It had about 20 price stickers on it.
im dating it around 1950
this just amazes me.
 
wireguru said:
what for? to power the vac? or for the control circuit?
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brantmacga said:
there are no grounding terminals at central vac outlets.
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Exactly.... they install an ungrounded NM from the central vac outlet to a nearby electrcial box. The central vac cord has no ground, so they use 2-wire NM. I don't know what they're paying for it, but they must be paying less than the going rate for NM w/ground.

Now all I gotta do it educate them about dropping their special undgrounded NM into boxes such a dead-end 3-ways, dedicated circuits such a kitchen, bath & laundry boxes, and the like.
 
Exactly.... they install an ungrounded NM from the central vac outlet to a nearby electrcial box. The central vac cord has no ground, so they use 2-wire NM.
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The fact that the equipment to be plugged in has only a two wire cord does not permit you to delete the EGC from the branch circuit, and a outlet with a grounding connection is still required. 406.3(A).
Don
 
don_resqcapt19 said:
The fact that the equipment to be plugged in has only a two wire cord does not permit you to delete the EGC from the branch circuit, and a outlet with a grounding connection is still required. 406.3(A).
Don
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Exactly! Just replace the non grounded circuits, that the hacks installed.
 
don_resqcapt19 said:
The fact that the equipment to be plugged in has only a two wire cord does not permit you to delete the EGC from the branch circuit, and a outlet with a grounding connection is still required. 406.3(A).
Don
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This is what they are wiring. There is no ground connection to make. They install the 12/2 between their box and mine.

centralvacrecep.jpg
 
480sparky said:
This is what they are wiring. There is no ground connection to make. They install the 12/2 between their box and mine.

centralvacrecep.jpg
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isnt that just a low voltage control circuit? every central vac ive seen uses 22/2 or something for the inlets.
 
jamesguy10 said:
Today i went to a local hardware store.
I bought a box of asphault covered 12gauge 2 wire w/o ground.
It had about 20 price stickers on it.
im dating it around 1950
this just amazes me.
Click to expand...

I love to visit old hardware stores where they still have new vintage items in stock. I was in one where they had some tomahawks on a self so I asked the owner if there is much demand for such an item since the end of the French and Indian war. It turned out that they hadn't been on the shelf quite that long. Some guy made them by hand and put them in the store on consignment to sell to knife collectors. :grin:
 
wireguru said:
isnt that just a low voltage control circuit? every central vac ive seen uses 22/2 or something for the inlets.
Click to expand...

Look closely at the lower right image. Top is 120v and it's for the beater-brush in the power head. The low voltage contacts are on the bottom of that photo.

Newer Central Vacs provide the 120v through the hose, and the vac inlet includes the actual 120v outlet. It's the older models that once used the vac suction to run the beater brush, or a pricier power nozzle and hose which had an additional cord.
 
That is correct.... the upper set of contacts is actually the 120V power source for the vac.

The metal hose end makes contacts with the little metal buttons inside the round portion of the sytem, and that's what turns the remote motor on.
 
growler said:
I love to visit old hardware stores where they still have new vintage items in stock.
Click to expand...

A few years ago, an insurance company sent me out to a rural house for a repair. Very rural. House hit by lightning.

Most everything that I needed was on the truck, except a 50-amp twinkie FPE breaker. I drove to the small town hardware store, just in case. There it was... a brand new, 50-amp, original, 2 pole thin FPE breaker. As I remember, it was less than $20 and has a thick layer of dust on it! That was the only FPE he had. He had a few Bryants, Zinscos, and Wadsworths.
 
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