i'm wiring a "mother-in-law" addition to an existing house. lr,dr,br and minimal use kit. (microwave range only.)1000 sq ft. it calculates so that i can use a 100 amp sub that will be fed from a meter can/breaker combo located on the main house. the question is, can the sub be located in a walk-in closet that measures 5x11 and providing the proper working clearances are maintained? also would the sub require a main breaker. thx for any suggestions. ken m