Low Voltage Buzz

[boatelectric]

This concerns Residential 110 vac.
When the low voltage lights are on in the house, any am radio that is plugged in and turned on buzzes like crazy.
They are seperate circuits.
Main power panel is 50' away from the house sub. Each box
has it's own ground(s). This happens whether the ground is
wet or dry.
Thank you,
S

 

[dpc]

This is most likely radiated RFI from the power conversion components in the low voltage lighting. If you have a small portable radio, walk around and see if you hear the noise and if you can localize it.

If it is only on the line-powered radios, the noise may be coming in on the power lines. A ferrite bead or toroid on the power cable right at the radio might help in this case.

But if you here the noise on the portable, there probably isn't much you can do about it without doing some things that could probably not meet NEC and/or void the UL certification of the low voltage lighting system.

You could try tightening all the wire connections in the low voltage system, but this is a long shot. I don't think grounding setup will make much difference.