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We have an older home with a fuse box in house and also breaker box outside. This is second time now in last couple weeks that all the main house overhead lights and outlets have gone out completely. They all go to the fuse box. First time was after turning light on and off in one room, and now yesterday after using the microwave.

All our other power like stove, washer, dryer, hot water, new room addition and maybe couple other items all go straight to the breaker box and they all work just fine. I have replaced fuses and the main lights and outlets going to the fuse box still do not work.

Multiple wires all join together in the attic and 2 main wires come down into the fuse box and then after running through their just 1 main wire goes to the breaker box. The breaker is fine and not tripped. The fuse box has buzzed a few times lately when using microwave. I am thinking fuse box is maybe bad and thinking I can totally bypass the fuse box by taking the 2 wires coming from attack and attach new wiring to them and go straight to the breaker box. It should be about 8 outlets/lights on each wire coming down from attic as I went up to inspect them best I could and did not see any issues.

I want to make sure I can bypass fuse box and check what size breaker to use. I am thinking either 20amp or 30 amp. I thought may need a 30amp breaker for each wire from attic so plenty of juice. I have done some electrical work before so comfortable doing it just making sure I am thinking right about how to do this as I can not afford to pay anyone. ANy help??!?

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    Most house wiring has been done with #12 or #14 cable. You wouldn't ever use a 30 amp breaker on those. #14 wire calls for a 15A breaker. – isherwood Nov 16 '18 at 16:22
  • A diagram would be most helpful here. The description is a bit confusing. – isherwood Nov 16 '18 at 16:23
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    That buzzing is worrisome, I don't even halfway follow the description in the question, but I don't think it's a stretch to say this is one where I'd call in reinforcements - get an electrician in there. – batsplatsterson Nov 16 '18 at 16:26
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    I think we need a lot more info. to figure this out, and a professional would probably be a good idea. The problem could be a "really messed up old fuse box" in which case either moving all those circuits to the (presumably much newer) outside breaker panel makes sense - or replace the fuse box with a subpanel. But either of those options will require quite a bit of work and you really need to know what you are doing. It is also possible that there are just a couple of bad connections somewhere that have gone bad - i.e., step-by-step junction-by-junction troubleshooting needed. – manassehkatz Nov 16 '18 at 16:53
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    Non-contact voltage detectors also don’t detect open neutral. – Tyson Nov 16 '18 at 19:14

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