Am I hearing things?

You obviously don’t know a thing about AC. 

If you forced the wrong BRAND breaker into your box, you could be in for a hot time. You know, (unlikely) what I mean, right?

Some breaker brands will “fit” into a different brand of box. But the contact may not be good so you may get a lot of resistance and heat build up and this can cause an “electrical fire”. I don’t have the patience to explain this to you, but if you think you may have made this mistake you have made a dangerous error.

The 30 fuse in a 20 circuit is just plain dumb, but it will not, by itself, cause dhrillness .< that IS a period. There is an easy cure for your shrillness - wait two weeks.  You will be acclimated to the “new sound” then and you will probably put it down to “burn in” - unless your house “burns down” first.

Hiring an electrician is quite easy. Learning how to BE an electrician is much more difficult.

”Burn in” is an audiophile mental construct. “Burn down”, in your case, may turn out to be an audiophile physical “destruct”!

Good luck.

Since there are electricians seeing this thread would like to ask them if 12/2 Romax is OK for 20 amp circuits. Is there some reason why 10/2 seems to be preferred in many audiophile installations? Is it the concept of "Overwire and Underbreaker?"

craigl59
248 posts                                                                         08-03-2018 10:36am

Since there are electricians seeing this thread would like to ask them if 12/2 Romax is OK for 20 amp circuits. Is there some reason why 10/2 seems to be preferred in many audiophile installations? Is it the concept of "Overwire and Underbreaker?"

Per NEC (National Electrical Code) #12 copper wire is the bare minimum wire size for a 20 amp branch circuit. NEC does not prohibit using a wire size larger than #12. Usually a larger wire size is used for VD (Voltage Drop) that may occur on the conductors of the branch circuit due to the connected load. The connected load does not need to be a continuous connected load. It could be caused by a fluctuating load.

The size of the breaker, overcurrent device, dictates the ampere rating of the branch circuit. The OP has a 30 amp breaker, therefore the circuit is 30 amps. Per NEC you can not install a 20 amp rated receptacle on a 30 amp branch circuit. Per code the breaker must be 20 amp.

Here is an old Link, but still holds true for when a breaker is supposed to trip if overloaded.
https://goodsonengineering.com/wp-content/uploads/2017/08/CircuitBreakerMyths_web.pdf

Thanks jea48.