Ok. Thanks or the link to MIT. I will read the handout. Bill Whitlocks bio speaks volumes to me as a pro musician who also dabbled in sound recording. (but spent most of my time on the other side of the glass. ;) ) Steve: I did note your comment on loops and sensor ground location. Thanks. Ed: good to know of a front to back wiring solution. (oil light etc.) I've also heard that 3 conductor extension cord can work just fine for that application. I know from experience how much more time it takes to fish single wires either already installed in loom or added later on, to the loom. Neil.
On Wed, Jan 10, 2018 at 2:39 PM, David Beierl <dbeierl@attglobal.net> wrote: Changing the length of a ground wire isn't likely to make much difference > unless it's carrying noticeable current, in which case if you double the > length as a rule of thumb you should go down three AWG numbers (or double > the number if you're using mm^2 wire). > > Changing the *location* of a ground won't generally be an issue for power > wiring but could be for signal wiring. Generally speaking "ground" > currents in the chassis will follow the shortest straight path to the > battery ground cable. Running grounds belonging to one system to multiple > places can introduce a problem called a ground loop. In an extreme case I > have seen a printer cable melt because the printer was plugged into a > different circuit than the computer (they were six feet apart on a factory > floor, but different circuits). > > All wire/grounding considerations become more stringent or difficult as > you move away from DC. The higher the frequency the worse the problem. > > http://web.mit.edu/jhawk/tmp/p/EST016_Ground_Loops_handout.pdf > > Yrs, > d > > >> >> >
-- Neil n Blog: Vanagons, Westfalia, general <http://tubaneil.blogspot.ca> 1988 Westy Images <https://picasaweb.google.com/musomuso/New1988Westy> 1981 Westfalia "Jaco" Images, technical <http://tubaneil.googlepages.com/> Vanagon-Bus VAG Gas Engine Swap Group <http://tinyurl.com/khalbay> |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.