I am surprised the microwave and fridge work on the same fuse- both draw alot of power when on.if you are using fuses, that tells me it is an OLD house w/ old wiring. most of the old houses I have worked on have 14 gauge wiring so the fuse should be 15 amp. when the circuit gets over loaded & people get tired of replacing the fuse,they just pop a larger one in.I have even seen 30 amp fuses on 14 gauge wires & a penny placed behind a blown fuse.DONT TRY THIS!! it will lead to a fire....only other shit on that circuit was my garage light, hallway light, kitchen light, refrigerator, oven and mircowave. ......runs on a 20amp fuse, electric did not return when we unplugged it, just threw a new 20amp fuse in the fuse box and the electric is back on...what the hell is going on?? is my ballast fried now?
even w/out the grow, you should call an electrician.most homeowners insurance companies charge extra because of outdated electric services.when upgrading to a breaker box,your electrician can break the existing circuits up and advise where you need new wiring.
hate to bring bad news but to be safe,you probably need to spend a few grand. it will be worth it to avoid a fire.
Fires suck!! I just spent last night helping a buddy clean out his house- his attached garage burned to the ground yesterday morning.no fire damage to house but due to smoke damage,its unlivable.