What year did the NEC change for dryer outlets.
I blow out sprinklers in my subdivision using a 22v compressor I
"inherited" from my son who'd used it when he painted houses to work his
way through college.
I've found a few of the earliest built houses have the old three prong
"crow foot" style dryer outlet, but most have the new four prong outlet
with one prong having the "L" shape.
I'm seeking fuel to force the builder to go back and install a code
approved dryer outlet.
If you have a C/O for the house, it means there was a certificate of
compliance for the electrical work issued, so I think it'll be pretty hard
to force him to do anything. You should see if a 4 wire cable was run for
the dryer as that would mean just changing the receptacle and dryer cord
would be necessary
if yur just looking to use your compressor build a adapter cord so it
can plug in either style outlet.
If your home is more than a couple years old ging after the builder
will likely cost more than its worth for legal fees, time and effort.
Way easier to run new cable and outlet and forget about it.
Such a issue should of been raised at the time of purchase, and would
of likely been found by a home inspector.
builders and subs cut corners wherever they can to make a few more
If you came to my house, I would prefer that you didn't disturb my
stuff to plug in your compressor. I would kinda expect you to
have a gas engined compressor to blow down my sprinkler lines.
That being said, if I did let you use my power and move my dryer
to plug your stuff in, I would expect you to have whatever adapter
cord ends premade to disrupt my stuff as little as possible. This
would require you to carry a pigtail for 3 prong 20 amp, 3prong
30 amp, and 4 prong 30 amp, perhaps even 3 prong 50amp and 4 prong
50amp. There are also many compressors capable of running on 110
volt. Watch the amperage plates, good compressors often need 110
w 20 amp, mostly homes have 15 amp receptacles. Don't plan on
running compressors on extension cords.
Keep the whole world singing . . . .
DanG (remove the sevens)
As others have said, whatever is there was approved by the local
inspector so you're SOL on getting the builder to do anything. There is
also no reason whatsoever to bother changing them as they work just
fine. Indeed for your 220V compressor there is absolutely no difference
between them since your compressor does not have a neutral to connect at
all. Only for dryers where there are both 220V and 120V loads is there
any (marginal) difference between the two types of outlet.
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