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    azcard46's Avatar
    azcard46 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Mar 6, 2008, 03:48 PM
    Mother-in-law Quarters 200 AMP
    I currently have a full 200 AMP service. I 'm going to add a Mother-in-Law Quarters. May I add another 200 AMP sub panel? I can't have a separate meter because of zone restrictions. I'm thinking about a tankless water system for the addition. I'm just looking at my options before I go looking for contractors.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Mar 6, 2008, 03:51 PM
    Most 200A panels will not accept a 200A branch breaker. Most are rated for 100-125A max branch breakers.

    WHY do you need 200A to the M-I-L part of the house? Because of the water heater?

    I would SERIOUSLY reconsider the on-demand unit.
    azcard46's Avatar
    azcard46 Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Mar 6, 2008, 03:57 PM
    That has been in the back of my mind, not having the tankless if it is going to be a lot of extra expense and work for the electrical. However my current 200 is maxed out. I added a RV garage and that took up my extra slots.
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