Load calc. for a existing home. Is this correct?

[zappy]

Hi, owner wants to add a 40amp 240v. load and a 20amp 240v load. House was built in the seventies. 100amp Bryant main. He wanted to know if he could add these loads. So I did a load calc. Here's what I came up with. 1650sqft. home x 3w. = 4950w. + 4500w. for SABC & laundry = 9450w. First 3000w. 100% + 35% for the rest = 5258w. General lighting.

Name plate on dryer 6720w. in wall oven 4080w. A/C 5760w. stove 8000w. steam something 8080w. = 32640w. Large appliance loads.

Fixed appliances, dishwasher 1152w. disposal 700w. garage door opener 720w. microwave 1716w. = 4288w. x .75 for 4 or more fixed appliances = 3216w.

Added everything up came to 41114w. divied by 240v. = 171amps. Can you please tell me if you see something incorrect. Thank you.

 

[charlie b]

You can take a 65% demand factor on the two cooking appliances, per Table 220.55. That will reduce your total KW by 4228, and your amps by 18. But still, looking only at the lighting, cooking, dryer, and A/C, that is enough to overload the system. So you can't add another light bulb, without upgrading the service.

 

[zappy]

You can take a 65% demand factor on the two cooking appliances, per Table 220.55. That will reduce your total KW by 4228, and your amps by 18. But still, looking only at the lighting, cooking, dryer, and A/C, that is enough to overload the system. So you can't add another light bulb, without upgrading the service.

Thank you Charlie.