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no common

C

curt

Jan 1, 1970
0
Where I live, the electric co. ran 2 wires for 240V. There is NO
common, each leg is 120V. When I try to use one leg for 120V and add a
ground for the common, the 2 lines become unbalanced and one line may
read 80V while the other reads 160V. What can I do to fix this
problem at my house? can I use capacitors or resistorss of something?
Thanks,
curt
 
R

Roger Gt

Jan 1, 1970
0
X-No-Archive: yes
"curt" wrote
: Where I live, the electric co. ran 2 wires for 240V. There is NO
: common, each leg is 120V. When I try to use one leg for 120V and
add a
: ground for the common, the 2 lines become unbalanced and one
line may
: read 80V while the other reads 160V. What can I do to fix this
: problem at my house? can I use capacitors or resistors of
something?
: Thanks,
: curt


Don't know of any installation in the US, so I assume it is
somewhere else.

The only safe way to get a "solid common for 110-120 is to use an
autotransformer of the N,110,220 style. A single winding
basically center taped. Usually you would input the 110 and get
220 out. IN your case, input the 240 and the tap is the common
for 120 each side. HOWEVER! DO NOT GROUND the "common", a
separate safety ground will be needed.

The Auto transformer will have to be large enough, Rated for the
load on the 120 volt side!

THIS IS NOT SOMETHING TO BE WIRED INTO A HOUSE UNLESS THE BUILDING
INSPECTOR APPROVES IT!!!!! IT IS POTENTIALLY LETHAL IF NOT DONE
PROPERLY!
 
M

Myron Samila

Jan 1, 1970
0
curt said:
Where I live, the electric co. ran 2 wires for 240V. There is NO
common, each leg is 120V. When I try to use one leg for 120V and add a
ground for the common, the 2 lines become unbalanced and one line may
read 80V while the other reads 160V. What can I do to fix this
problem at my house? can I use capacitors or resistorss of something?
Thanks,
curt


Where do you live?

I live in Toronto, and the El Co also only runs two legs of 120V, that is normal. The
Neutral is picked up via ground. You need to call an electrician.
 
K

Ken Taylor

Jan 1, 1970
0
Myron Samila said:
Where do you live?

I live in Toronto, and the El Co also only runs two legs of 120V, that is normal. The
Neutral is picked up via ground. You need to call an electrician.

--
Myron Samila
Toronto, ON Canada
Samila Racing
http://204.101.251.229/myronx19
From his headers, the OP appears to be in Venezuela. The vital issue is that
he doesn't know enough to safely do what he wants, he needs to contact a
qualified electrician.

Ken
 
A

Art

Jan 1, 1970
0
Gov: You will need to have a qualified electrician come out and install a
ground rod at your location, inspect the rest of the interconnects, and
confirm that indeed it is a good earth ground and the other legs will indeed
balance. Otherwise you may need to contact Ontario Hydro and ask them
particularity what you require in your specific location there in T/O May
need a couple Labatts on hand tho, Eh~~ BTW DO NOT attempt a "RED - GREEN"
application and repair, it will bite you in a big way!!
 
M

Myron Samila

Jan 1, 1970
0
Art said:
Gov: You will need to have a qualified electrician come out and install a
ground rod at your location, inspect the rest of the interconnects, and
confirm that indeed it is a good earth ground and the other legs will indeed
balance. Otherwise you may need to contact Ontario Hydro and ask them
particularity what you require in your specific location there in T/O May
need a couple Labatts on hand tho, Eh~~ BTW DO NOT attempt a "RED - GREEN"
application and repair, it will bite you in a big way!!


hehe, love the Labatts reference, but my electrical is fine!! I didn't realize where the
OP was in the world.

Red Green uses duct tape to tape together 1000 MCM wire feeding a 600V 400A 3phase
service! ;)
 
A

Art

Jan 1, 1970
0
Straight on Gov: Like your web site with the links. Spent too much time in
Peterborough years back while in College there, not far from tbe old Trent
Canal. Best regards, hope the Leafs and Wings have a chance at the Cup this
year, Eh?/ I know, off the flippin thread again, Cheers
 
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