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lenny22 · Nov 18, 2012, 12:03 AM

Imgaine that you are working in a one-family dwelling that has a floor area of 1800 square feet (exclusive of an unfinished cellar that is not adaptable for future use, an unfinished attic, and open porches). The appliances in the home are an 11 kW range and a 6 kW, 240 V dryer. What is the minimum number of 120-volt 2-wire branch circuits that would be required for this home?

Fr_Chuck · Nov 18, 2012, 02:52 AM

Where, code for England will not be same as US, and certainly not the same as China.

tkrussell · Nov 18, 2012, 04:15 AM

What is your answer?

lenny22 · Nov 18, 2012, 06:29 AM

My answer is 7

lenny22 · Nov 18, 2012, 06:31 AM

Originally Posted by tkrussell

What is your answer?

7 is my answer

tkrussell · Nov 18, 2012, 07:11 AM

I arrive at 6.

1800 SF at 3 watts/SF= 5400 watts / 120 volts = 45 amps, min 3 - 20 amp circuits for general lighting load.

Plus the required two for small appliance, and one for laundry, totaling 6- 20 amp circuits.

How did you arrive at 7?

Any reader should keep in mind, this is bare minimum required by Code. Should always exceed Code requirements, and have more circuits that minimum.

lenny22 · Nov 18, 2012, 07:15 AM

I added in a bathroom circuit even though it didn't say one that is why I am not sure

tkrussell · Nov 18, 2012, 07:18 AM

A bathroom circuit is required, but not required to be included in the calculation of sizing the service or min amount of circuits.

lenny22 · Nov 18, 2012, 07:20 AM

Originally Posted by tkrussell

A bathroom circuit is required, but not required to be included in the calculation of sizing the service or min amount of circuits.

That is why I was not sure thank you