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Old 06-18-2019, 04:21 AM   #1
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Join Date: Jun 2019
Location: Charlotte, NC
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Need DC Ground Lead info

Trying to install a dc shunt for a dc volt/amp meter in an '19 Vengeance Rogue 31V. Found ground buss under bath and kitchen sinks. Pulled the shore power and turned on salon overhead lighting. Pulled all of the battery sized white leads from visible busses and the lights never went out....?
Anyone care to hazard a guess as to how the dc chassis ground system is set up? I'm assuming that the frame is being used as a ground? The dc voltmeter works. Like to have the amps showing too, but not critical.
The AC meter works well and that is important on a 30A system.
The way the unit is sealed up, no easy way to access anything or pull secondary leads.
Just curious about how the grounds are setup.
Thanks for any info!
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Old 06-18-2019, 06:11 AM   #2
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My 388V16 has 2 battery banks and multiple connections to chassis ground. I was also pondering how to connect a shunt. I suppose if you lifted the ground cable from the battery and connect that to the load side of the shunt then added a jumper (same gauge wire) from the battery negative to the line side of the shunt you will capture the load the battery is serving.
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Old 06-18-2019, 07:46 AM   #3
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Quote:
Originally Posted by Converted View Post
My 388V16 has 2 battery banks and multiple connections to chassis ground. I was also pondering how to connect a shunt. I suppose if you lifted the ground cable from the battery and connect that to the load side of the shunt then added a jumper (same gauge wire) from the battery negative to the line side of the shunt you will capture the load the battery is serving.
Thanks! That solution occurred to me, but don't see a simple (relatively) way of routing the secondary leads into the converter area.
After some thought. I bought a volt amp with a hall sensor. I can drop that "toroid" over the B+ and move on. Too simple...
I think? Thought the other was "too simple" too.
The cheapo shunts have a short life span due to heat cycling. The toroid may live longer. No isolator required.
Shunts in B+ can be a bit dangerous...
Thanks again!
I'll post the outcome/end result.
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