Common earth 24 and 12v systems
Submitted: Sunday, Sep 18, 2011 at 10:37
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RussellP
I'm about to pick up an ISUZU NPR 250 that is 24v and has a separate 12v system for the trailer. It's been properly set up by a motor vehicle electrician.
I'm going to add a 12 pin plug and video screen so that I can tow my 5th wheeler.
Can I earth the 12v appliances (video camera and earth on pin 10) back to the chassis? Or do I need to run the earths back to the 12v system?
Reply By: oldtrack123 - Sunday, Sep 18, 2011 at 11:11
Sunday, Sep 18, 2011 at 11:11
Hi
I would expect that the 12v neg &24v neg would be common earthed , but you would be best to ask the auto elecrician ,who did the set up, if that is what HE has done
Peter
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Follow Up By: RussellP - Sunday, Sep 18, 2011 at 16:05
Sunday, Sep 18, 2011 at 16:05
Normally I would chase it up with the person who did the work.
But the truck's 1200 klms away and the work was done 2 years ago...
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Reply By: garrycol - Sunday, Sep 18, 2011 at 18:38
Sunday, Sep 18, 2011 at 18:38
I have a truck with a 24v alternator and batteries and a 12v alternator and battery - all earthed to the chassis - so a common earth.
Garry
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