- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
A friend sent me an email asking why a dp breaker rated 120/277 cannot be used for 240 Volts. I have never noticed a breaker rated that way. Any help.
120/277 DP Breaker
- Thread starter Dennis Alwon
- Start date
- Status
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
My first though would be to refer him to the "eyeglasses at Wal-Mart" thread
I wondered about that also. His eyes are bad....
- Location
- Illinois
- Occupation
- retired electrician
If it was actually marked that way, there is no reason why you can't use it on a 120/240 volt system. The first number is the maximum permitted voltage to ground and the second is the maximum permitted phase to phase voltage. You could not use it on a 3 wire 240 volt system because of the 120 volt part of the "slash" rating.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Well thanks for the replys but apparently he was talking about a DP switch not a CB. I guess I never look at them -- they are rated 120/277. I told him exactly what Don said. Thanks again and sorry for the confusion-- I should know better than to post for someone without all the info.
- Status