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diyAudio Member
Join Date: Oct 2010
Location: Tenn Loop Ranch, Lebanon, Tn.
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Hum, Noise, And House Electrical Grounding
Consult a licensed electrician for house/building wiring and ground issues! We had
audio equipment hum/noise and minor lightning damage that were caused by Neutral to
Ground shorting in our house wiring. This condition is insidious because it won't trip
breakers, blow fuses, or show itself in an obvious way, just vaguely show itself by hum
and lightning damage sensitivity. Our issues were caused by an unneeded Neutral-to-
Ground Bonding strap in our kitchen range, as the strap is needed for 3-wire cord
installations and must be removed when using a 4-wire cord. Refer house wiring issues
to a licensed electrician. Do not attempt to rewire the cord on a kitchen range, clothes
dryer, or any major appliance unless you completely understand how to wire major
appliance power connections!
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A stiff power supply in a great-sounding amp is always better for you than a stiff drink. 
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