I have a residential electric furnace name plate states maximum overcurrent protection 60amps , this rules out #6 Romex correct , what type of copper wire do you install in this situation. The furnace is a 10kw unit , the amp draws listed on nameplate ( for several different models ) are all about 57 amps.
Furnace wire size
- Thread starter KWH
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BILLY101
Member
- Location
- Telford, Pa
10KW/240 volts = 41.7 amps x 1.25 = 52 amps -- #6, 75*c copper is OK.
Makes sense for a 60 amp breaker.
Double check the nameplate for the equipment being installed.
BILLY
Makes sense for a 60 amp breaker.
Double check the nameplate for the equipment being installed.
BILLY
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Depending on the brand a 10 kw unit may actually be 10 kw , 9,6 kw etc but remember there is the motor load that must be added to it. I have seen quite a few 10kw units that req. 56 or 57 amps.
- Location
- Massachusetts
Which rules out 6 copper NM or SE.
Mgraw
Senior Member
- Location
- Opelousas, Louisiana
- Occupation
- Electrician
Make and Model#?
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Why? #6 at 60 C is 55 amps... Obviously this would not work for the furnace in question that is 57 amps if you use nm or se cable.
- Location
- Massachusetts
You must have skipped over what I quoted and made bold.
NM and SE is not 75 C copper.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I was thinking you were saying it ruled out #6 NM from this install because it was 60C but you meant it ruled out NM from the 75C. I see that now.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Do you not believe me? :grin: The last install I made like this was almost 2 years ago. I have no idea of the brand and it was a job with a heating contractor that I never worked with before. I do want to add that I have seen it a few times so I will guess that Trane was one brand but not sure.
Dennis. I'm like you in that I check these things daily but I just read the MCA and MOCP off the nameplate, They are all just big gray, brown or green boxes some seem to have a MCA of 54/55 some a bit higher.
I do recall that one brand has a "A" or "B" model with different currents...apparently bigger blowers.
either that or you are making it all up...
some seem to have a MCA of 54/55 some a bit higher.I do recall that one brand has a "A" or "B" model with different currents...apparently bigger blowers.
either that or you are making it all up...
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
lol...........either that or you are making it all up...
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