Residential load calculation for adding pool heater to existing 200 amp service

Status
Not open for further replies.
J

J R

Member
J R. Started using Mikes Forum yesterday. I hope this works out better.
Is this the correct way to calculate new pool heater load added to existing 200 amp service using optional method

General load

2,000 sq ft X 3 6,000
Small appliance 3.000
Laundry 1,500
Range 12,000
Water heater 4,500
Dishwasher 1,500
Disposal 800
Clothes dryer 5,000
Refrigerator 1,800
Microwave 1,600
G.D.O 800
Pool Pump 1hp 1,920
Pool Heater (New) 9,600
Spa 9,600

Total General load 59,620

First 10,000 10,000
Remander @40% 19,848
10 Kw Heat @100% 10,000

Total 39,848 - 240 = 166.0 amps
 
J R said:
J R. Started using Mikes Forum yesterday. I hope this works out better.
Is this the correct way to calculate new pool heater load added to existing 200 amp service using optional method

General load

2,000 sq ft X 3 6,000
Small appliance 3.000
Laundry 1,500
Range 12,000
Water heater 4,500
Dishwasher 1,500
Disposal 800
Clothes dryer 5,000
Refrigerator 1,800
Microwave 1,600
G.D.O 800
Pool Pump 1hp 1,920
Pool Heater (New) 9,600
Spa 9,600

Total General load 59,620

First 10,000 10,000
Remander @40% 19,848
10 Kw Heat @100% 10,000

Total 39,848 - 240 = 166.0 amps
Click to expand...

Yes, you have it generally correct. I think you can leave out the refrigerator, because it can be included as part of the small appliance circuit load.

Your post yesterday mentioned an Air Conditioning load that was larger than your heating load. The larger of the heat or A/C should be used in the last step.
 
Noticed there was no HVAC. That could be a big hit depending on what you have. You don't get to apply the 40% factor to HVAC loads, but they do have their own factor in the table. I'm wondering what heat is since nothing else seems to be a gas appliance.
 
Residential load calculation for adding pool heater to existing 200 amp service

Carification. The 10KW heat should have read 10KW electric heat larger then Air Conditioning @100%. Correct ?
 
Didn't see your 10KW entry for heat. You can apply a 65% factor to the heater nameplate (which usually has an MCA value using 125% of true KW) if it is a central unit with 3 or less stages. If there are 4 or more units/stages, then you apply a 40% factor.

After this value, compare to the AC unit (which would go in at 100% nameplate) and use the larger of the two.
 
Status
Not open for further replies.
Top