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Author Topic: Should I have 2 grounds?  (Read 382 times)
KD5CFM
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Posts: 9


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« on: May 16, 2005, 01:50:41 PM »

I've been reworking my wiring in anticipation of installing a new FT-857.

I've run both an #8 power and #8 ground wire for my equipment (FT-1500 for APRS, TinyTrak 3, GPS, and soon to be installed FT-857) from the battery to distribution blocks, but I've noticed that if I disconnect the ground cable, the FT-1500, and the TinyTrak 3 and GPS continues operating. I finally tracked down the extra ground to the FT-1500. The only possible reason is the FT-1500 is also grounded by its mount.  Is this a problem that there are 2 grounds?   should I attempt to insulate the mount from the sheet metal it is bolted to?

73,

KD5CFM
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AA4PB
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Posts: 13032




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« Reply #1 on: May 17, 2005, 03:55:59 PM »

It's nearly impossible to eliminate multiple ground connections on a mobile installation. Not only is the mount grounded, but usually the coax shield as well. As long as you have a good low resistance ground back close to the battery negative terminal then you shouldn't have a problem.
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