Ammeter shunts and ground loops

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couchflambeau

Member - Posts: 4

Joined: June 10, 2005

Location: United States

Posted: March 23, 2026 at 3:56 AM / IP Logged

Hello all,

I'm in the process of installing a large audio system and installed a shunt on the ground side of my amplifier rack which then goes to a common piece of 2/0 wire that goes to my chassis ground in the back of the car.

Im noticing an alternator whine with the car running. I believe the shunt is rated as 200mV.

Can the shunt resistance be causing a ground loop?

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