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Home > Maintenance & Modifications > guess how many AMPS travel down earth cable ANSWER |
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pab Member Since: 28 Aug 2012 Location: Now in Mid-Wales Posts: 2006 |
Approximately the same as travels down your main earth cable. And if you add a third cable then approximately the same current will flow down all three. That's the way electricity works! |
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29th Jan 2013 7:36 pm |
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fisha Member Since: 28 Aug 2012 Location: Scotland Posts: 299 |
^^^ I agree. |
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29th Jan 2013 7:41 pm |
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Steve D Member Since: 19 Jan 2013 Location: Essexshire Posts: 4102 |
4? |
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29th Jan 2013 8:01 pm |
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amerclarke Member Since: 28 Nov 2009 Location: warwickshire Posts: 80 |
22 Al C |
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29th Jan 2013 8:04 pm |
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ccsnet Member Since: 05 Jan 2013 Location: Lancs Posts: 881 |
Subbing as I'm interested in this...
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29th Jan 2013 9:41 pm |
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npinks Member Since: 28 Jun 2007 Location: Ls25 Posts: 20090 |
knows
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29th Jan 2013 9:49 pm |
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mike e Member Since: 18 Jan 2011 Location: WALES Posts: 81 |
I = V/R if i remember correctly |
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29th Jan 2013 10:04 pm |
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fisha Member Since: 28 Aug 2012 Location: Scotland Posts: 299 |
need more info to answer... but as a rough guess ...
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29th Jan 2013 10:29 pm |
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EYorkshire Member Since: 18 Nov 2010 Location: (!) Posts: 4392 |
I've poked a little fun at 'oldgeezer' in the past regarding his extra earth wire, but I have no doubt of the consequences if the starter motor or any other components earth return path has an electrical resistance.
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30th Jan 2013 9:30 am |
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pab Member Since: 28 Aug 2012 Location: Now in Mid-Wales Posts: 2006 |
EY is absolutely right, of course. I'm merely pointing out that if the resistances of the earth cables are as they should be then each cable will carry an equal share of the current. However many cables there are.
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30th Jan 2013 9:46 am |
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nicedayforit Member Since: 06 Feb 2012 Location: Beside the Solway Posts: 114 |
Don't forget the engine earth strap is also part of the alternator charge circuit and if not up to scratch can affect battery charging.
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30th Jan 2013 9:49 am |
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EYorkshire Member Since: 18 Nov 2010 Location: (!) Posts: 4392 |
Wholeheartily agree with 'pab', stray earth returns and electronics do not mix well. While I have never had a problem like 'Oldgeezer's' it would pay everyone to at least check and clean their earth connection both on the battery and the bodywork, so long as this resistance is lower than any other earth return it will use it and not some 'piddly' earth wire under the dash that has a better connection but grossly undersized. When the better weather come in I think I'll remove mine and give it a clean |
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30th Jan 2013 11:48 am |
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oldgeezer Member Since: 09 Apr 2011 Location: Wiltshire Posts: 1302 |
some interesting comments so far , i will put you out of your misery soon.
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30th Jan 2013 5:37 pm |
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pab Member Since: 28 Aug 2012 Location: Now in Mid-Wales Posts: 2006 |
I haven't given a number as yet, so I suppose I ought...
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30th Jan 2013 6:19 pm |
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