The following warnings occurred:
Warning [2] Undefined property: MyLanguage::$archive_pages - Line: 2 - File: printthread.php(287) : eval()'d code PHP 8.1.28 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/printthread.php(287) : eval()'d code 2 errorHandler->error_callback
/printthread.php 287 eval
/printthread.php 117 printthread_multipage



Austinsevenfriends
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: 1 2

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.
http://www.rrec-northeast.co.uk/positive_negative.pdf

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?
I have always believed that positive earth wasn't introduced until 1936.

Regards from the creative county - Staffordshire

Stuart
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.

David

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.   Huh

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.

John Mason

my 33 RP is positive earth

Andy B