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Old 06-17-2007, 02:15 PM   #1
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from the pole to my load panel I have 110v on one wire and 110v on the second wire the third wire is white. this is a new home and the old house had 220v on the two wires and the new house has 277v comming in at the pole with both wires and I need to hook up my welder that runs from 208 to 240 will this blow my weld unit with 277v ?
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Old 06-17-2007, 03:50 PM   #2
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Originally Posted by cyberdog View Post
from the pole to my load panel I have 110v on one wire and 110v on the second wire the third wire is white. this is a new home and the old house had 220v on the two wires and the new house has 277v comming in at the pole with both wires and I need to hook up my welder that runs from 208 to 240 will this blow my weld unit with 277v ?

Let me understand this little more clear here first ,..

Majorty of resdential [ home ] are wired for 120/240 volts some are at 120/208 [ not too often but it do show up in few spots ]

277 volts or more is restricted to commercail / industrail areas

If you are reading 120 volt on one leg and second hot wire is 120 volt [ read hot to netural ] and hot to hot useally be 240 volt range [ some newer area will read slightly higher voltage pretty close to 250 volts.

Did you actally check the repectale for the welder to verify the correct voltage and plug type ??

Most stick arc welder can useally run either 208 or 240 volt without much difficulty at all unless the welder have multi tap on primary side [ check with your welder for specs and nameplate to verify it ]

I have plain jane lincon stick arc welder it ran fine with me on 208 v circuit but just ran the welder one notch higher than what i useally do on 240 v circuit

The other thing for resdentail area the codes do not allow any voltage higher than 250 volts in the resdential area at all [ this code been in the books for very very long time senice the Edison days ]

the 277 volts is part of 3 phase voltage that read line to netural and if you are reading line to line it will read 480 volts unless you ran the multimeter wrong

{ the POCO powercompany will not provide the 480/277 volts at resdentail home at all }

if more question please do post it here

Merci . Marc
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