The safer thing to do would be to put a small inverter in your car (creates
a 24 V potential) then you can use the same ground. Much safer this way.
http://compare.ebay.com/like/230672490898?var=lv<yp=AllFixedPriceItemTypes&var=sbar&_lwgsi=y
Since you don't plan to run a high powered radio, this converter will work
very well.
Alan
On Thu, Sep 15, 2011 at 10:44 PM, S and T Miller <stmiller96 at
hotmail.com>wrote:
> I found a nice 3M automotive twin (can do two cars) power cord (#03873na)
> that
> Wal-mart sells for about $6.00. It is fully insulated with a plastic end
> cap.
> I plan to cut the cig lighter plug from the end and attach bullet
> connectors
> and a inline fuse. I am going to plug into a power source and ground under
> the dash. Being pos ground (and I want to keep it that way- no reason why,
> other then I want it that way) as long as I keep the GPS unit or cell phone
> charger/ phone fully isolated from any grounding source it will not be an
> issue. I plan to keep the power outlet under the dash probably on the
> parcel
> shelve.
>
> Wanted to get a second option on two things: The positive would be the
> center
> of the cig lighter jack(lack of a better term- nipple). And the inline
> fuse
> should go on the positive side and not the negative side, right?
>
> The Millers
> "British Car Nuts"
>
> "Always drive them, but remember each drive in an antique car is a test
> drive."
>
> "Rust is just natures way of saying- should have been a hole there".
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