Home Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Incoming AC legs NOT created equal...

Years ago when I installed the single dedicated line, I followed the advice here on the Asylum about "putting the breaker at the top of the panel". OK, so the electric range is on the top left two positions. (240v) I installed my dedicated line opposite this, on the right. For the past fifteen years this has serviced my system. IT NEVER DAWNED ON ME THAT THE INCOMING LEGS ON MY NEW CONSTRUCTION HOME WOULD NOT BE THE SAME. (time for a Homer Simpson duh)

Recently I was reading through the archives about AC, and I came across a post where someone mentioned that yes, one leg may be better than another. Hmmm.....Really??? So I moved the breaker down one slot to the other leg. (insert brain melting sounds here) OMG!!!! The system sounds SO much better on this leg! Audiophile ears needed? Not even close...

Fast forward to today. I decided to treat myself and purchased a new Noise Sniffer off eBay for $28 shipped. (A genuine bargain) Per instructions, I plugged the Sniffer into my "good" leg, and rotated the adjustment knob until the meter read "100". I then plugged it into my "bad" leg, without touching the adjustment knob. Meter now reads "170". A higher reading is more noise. A reading of 200 would be double the noise. You can hear the extra crap on the bad leg via the rear mounted speaker in the sniffer.

Why one leg is better than the other? I really don't know. If I may be allowed to guess, perhaps one of the neighbors that is sharing the transformer out in the street has an electrical device that is polluting that leg. My second guess would be a less than perfect connection somewhere.

To conclude, I can say with certainty, that one should trust their ears... AND TRY BOTH LEGS...

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Topic - Incoming AC legs NOT created equal... - tweakmenow 11:54:48 05/29/17 (17)


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