Solve for the worksheet, do not solve the ones with x mark and igonor my answers

Question

Solve for the worksheet, do not solve the ones with x mark and igonor my answers.

Residential services are not sized for total connected load - an experience-based diversity factor keeps service size below 200 amperes for all but estate size dwellings. Utility services larger than 200 amperes require current transformers and are usually metered as commercial customers. The 1987 NEC optional calculation 220-30 is the basis of this form. Lighting, allow 3 watts or VA per square foot 220-3b Provide a minimum of two kitchen appliance circuits - allow 1, 500 watts or VA each-these cannot serve exhaust hoods, dishwashers, disposers, or other outlets 220-16 Laundry circuit allow a minimum of 1, 500 watts or VA 220-4c Clothes dryer allow 5,000 watts or VA or nameplate rating (use the larger value) 220-18 Appliance Loads. estimated. watt or VA values nameplate values are better Select the largest of heating or air-conditioning load weighted as follows: AC equipment including heat pumps at 100% OR. Central electric space heating including supplemental heat in heat pumps at 65% OR Nameplate rating of electric space heating if less than four separately controlled units at 65% OR Nameplate rating of four or more separately controlled electric space heating units at 40% Then ADD 100% of the first 10 kVA of other load and 40% of the remainder of all other load.

Explanation / Answer

lets assume heating or air condition room is of size 1000 ft3 which requires 1ton air conditioning

so wattage requried for cooling/heating is :1200W

minimum two appliance circuit is requried for kitchen so appliance circuit wattage is :3000W

for Laundry circuit : 1500W

for lighting floor area : lets assume room is 10foot X10 foot=100 square foot

so wattage for lighting floor= 3*100= 30W

wattage for cloth dryers :5000W

wattage for cook top :6000W

wattage for oven : 4500W

wattage for range :12000W

wattage for dish washer :1200W

wattage for exterior lighting : it can estimated roughly upto 200W

wattage for Frezzer : roughly around 800W

wattage for garbage disposal: 300W

wattage for trash compactor : 2000W

water heater : 4500W

total wattage=1200W +3000W+1500W +30W+5000W+6000W+4500W+12000W+200W+800W+1200W+300W+2000W+4500W =42230W

service calculation=10000+(32230*0.4)=22892W

Ampers requried=22892/240= 95.4A

So Amper requriment =100A

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