220.55 30 ranges
- Thread starter augie47
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wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
I get 51.75 kW:
For (30) 12 kW ranges, column C gives 45 kW. Then Note 1 says that we increase that 5% for per kW in excess of 12 kW. We have 3 kW extra per range, so we increase that by 15%. 45 kW * 1.15 = 51.75 kW.
Cheers, Wayne
For (30) 12 kW ranges, column C gives 45 kW. Then Note 1 says that we increase that 5% for per kW in excess of 12 kW. We have 3 kW extra per range, so we increase that by 15%. 45 kW * 1.15 = 51.75 kW.
Cheers, Wayne
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
That's not what I got, but I'm old!
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Agreed...
Hre is a small table
Hre is a small table
- Location
- New Jersey
- Occupation
- Journeyman Electrician
There should be a table like this in the NEC.
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
I got the 51.75 too but wasn't sure enough to post it. I've never had to figure for that amount of ranges.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
It is the same as one range. The difference is the demand factor but everything else is the same.
I am sure you are talking about dwelling unit single phase ranges. Are they being installed on a single phase system or are they being installed on a three phase system?
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Normally a question like this is assumed to be single phase residential. If the wanted 3 phase the question would normally state 3 phase
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Btw, I should give credit for the table above to Mike Holt
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