mxslick

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Haven't seen one in years! But 3w 240 is fine.

Then you would be 'sharing' a neutral. [Linked Image]

Your missing the point Don and I made, you share neutrals back to the source as soon as you reach the panel. The panel is not the source of the power.

There is nothing special in a panel to stop a hum.

Amplifiers can cause added harmonics on a shared neutral but that is a separate issue and not one that will cause a hum.

I would be looking for improper grounding and improper neutral to grounding connections.

tdhorne
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It ties right into a sore subject. Anyone that cannot work safely with a multi wire branch circuit has no business doing electrical work.

I sure agree with you there. [Linked Image]

Bob

Bob Badger
Construction & Maintenance Electrician
Massachusetts