So I have power going into junction box into attic 12g/20A.
It fed a light switch, the light switch was chained to microwave outlet. Also in that junction box and connected to the light switch line was the light.
The line to the light switch and the line from light switch to microwave outlet were aluminum. This setup has worked since I bought the house - I did run copper to junction about 3 years ago.
So microwave just doesn't work right all of a sudden a few days ago - it has symptoms of low voltage to the point where clock wasn't even functioning right.
I go up in attic and everything seems clean and tight. [Note voltmeter is at a job and haven't had access to it so I will see what kind of power I am getting tonight hopefully] Grounds are tied to metal box and each other, everything is under the purple AL rated caps.
I gave up troubleshooting so snipped aluminum line in half that ran from light switch to the microwave outlet and directly ran the microwave outlet to the junction box. Boom everything working fine.
Two days later, exact same issue. It almost sounds like something is loose at the outlet but have tried switching outlets and have triple checked all my connections. Is there a chance that the AL wiring is having issues? Any thoughts on what might be the cause? I am going to run a copper line tonight for it but this will bug the crap out of me if I can't actually figure out the cause. Going on 4-5 hours for one outlet definitely record for me.
Addendum: Installed new outlet, hit it with voltmeter and was get 120V - very clean. Microwave worked for 2 days - 20+ times. Boom late last night, stops working. Of course voltmeter at a job again... Is there any reason my lights would work fine but microwave outlet not when they are both branched from same junction power other than a loose connection? Starting to think that the AL wiring is faulty.