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Positive or negative earth - Printable Version +- Austinsevenfriends (https://www.austinsevenfriends.co.uk/forum) +-- Forum: Austin Seven Friends Forum (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=1) +--- Forum: Forum chat... (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=14) +--- Thread: Positive or negative earth (/showthread.php?tid=1254) Pages:
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Positive or negative earth - Hentzant - 29-05-2018 DThe I am in the process of completely rebuilding my 1934 rp saloon.As the car has to be rewired what are the pros and cons of wiring negative or positive earth. RE: Positive or negative earth - Chris KC - 29-05-2018 I'll stick my neck out a bit and say that the difference is largely theoretical, I've used both over the years without issues. Do make sure your dynamo and coil are set up with the corresponding polarity. Ideally run your wiring directly back to the battery rather than earthing through the body, and use the thickest wire you can in order to minimise voltage losses. RE: Positive or negative earth - Nick Salmon - 29-05-2018 Have a read of this and all will be made clear. http://www.rrec-northeast.co.uk/positive_negative.pdf RE: Positive or negative earth - Hentzant - 29-05-2018 (29-05-2018, 11:24 AM)Nick Salmon Wrote: Have a read of this and all will be made clear. Thank you nick After reading this i’ll Stick to the original positive earth system used on the car. RE: Positive or negative earth - Stuart Joseph - 29-05-2018 Good afternoon. were RP's positive earth? I have always believed that positive earth wasn't introduced until 1936. Regards from the creative county - Staffordshire Stuart RE: Positive or negative earth - Hentzant - 29-05-2018 (29-05-2018, 12:48 PM)IStuart Joseph Wrote: Good afternoon. were RP's positive earth?Hi Stuart Well the car was in pieces when I bought it and there was a short battery lead to the chassis with a positive symbol on the connecter.Of course this doesn’t mean it was original to the car.Someone in the past has fitted a later 3 bearing engine so maybe the car was negative earth originally. Ken RE: Positive or negative earth - David Cochrane - 30-05-2018 The List of Production Changes shows: Negative earth up to December 1935. My 1933 RP is negative earth. David RE: Positive or negative earth - DaveT - 30-05-2018 (30-05-2018, 10:51 AM)David Cochrane Wrote: The List of Production Changes shows: Negative earth up to December 1935. My 1933 RP is negative earth. Hi, my MK1 Ruby was registered on the 10th July 1935 and the numbers correspond to manufacture in April 1935 as she has all her original matching parts and it's wired as positive earth. RE: Positive or negative earth - John Mason - 30-05-2018 My March 1935 Ruby is negative earth. John Mason RE: Positive or negative earth - Andy Bennett - 30-05-2018 (30-05-2018, 08:43 PM)John Mason Wrote: My March 1935 Ruby is negative earth. my 33 RP is positive earth Andy B |