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    noremac77's Avatar
    noremac77 Posts: 4, Reputation: 1
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    #1

    Apr 2, 2013, 06:32 AM
    1050 sqft house all electric . Is 100amp enough if converting garage into master&bath
    1050sqft house is currently running on 100 amp service with all electric: furnace, water heater, stove, etc. going to convert attached garage into master bed/bath plus additional room. Garage is 12x24. Do I need to have converted to 200 or will 100 be plenty for that size of house?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Apr 2, 2013, 07:29 AM
    What electrical devices will you be planning for the addition? Heating? Hot water? How will you heat the bathroom. Code today is a minimum 100 amps and in looking at total electric loads you have you may be stretching if you add more circuitry.
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    noremac77 Posts: 4, Reputation: 1
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    #3

    Apr 2, 2013, 09:29 AM
    Quote Originally Posted by ma0641 View Post
    What electrical devices will you be planning for the addition? Heating? Hot water? How will you heat the bathroom. Code today is a minimum 100 amps and in looking at total electric loads you have you may be stretching if you add more circuitry.
    Will branch off CA/Furnace to heat additional rooms. The house also has a well so the pump is ran off service. So there will be the CA/Furnace, water heater, softner, well pump, stove, washer, dryer, and the normal outlets and lighting.
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    ma0641 Posts: 15,675, Reputation: 1012
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    #4

    Apr 2, 2013, 09:45 AM
    Personally I would upgrade. You will be increasing the square footage by 35% .Just with that alone at 3 watts per sq. ft equals 40 amps for general circuitry, not counting kitchen, heater, well, stove etc. I will have to assume this is an older house. Do you know what the utility supply is? Capable of 200 AMPS or will they need to run a new service?
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    noremac77 Posts: 4, Reputation: 1
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    #5

    Apr 2, 2013, 11:55 AM
    Quote Originally Posted by ma0641 View Post
    Personally I would upgrade. You will be increasing the square footage by 35% .Just with that alone at 3 watts per sq. ft equals 40 amps for general circuitry, not counting kitchen, heater, well, stove etc. I will have to assume this is an older house. Do you know what the utility supply is? Capable of 200 AMPS or will they need to run a new service?
    Built in 1952, don't know what supply is yet. Just a house I'm looking to purchase and wanting to figure out necessary updates for addition.
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    ma0641 Posts: 15,675, Reputation: 1012
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    #6

    Apr 2, 2013, 02:38 PM
    Yea, I guessed older. Does it have 2 or 3 prong wiring? I would bid low enough to cover the cost of upgrade-varies but figure $4000 +/-.
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