The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: BooG on July 19, 2014, 03:37:41 AM

Title: Wire colours
Post by: BooG on July 19, 2014, 03:37:41 AM

Hi.
I need to do some work on the loom, but I am having difficulty tracking down the correct wire color combinations. Anyone know where I can source appropriate cable in the UK? I am after the grey and black wire that runs between parking lamp etc.
Thanks!

Title: Re: Wire colours
Post by: Barry on July 19, 2014, 04:40:38 AM

Vehicle wiring products do slate/black which sounds like it might be the right colour.

http://www.vehicle-wiring-products.eu/VWP-onlinestore/cable/thinwall.php

Title: Re: Wire colours
Post by: BooG on July 20, 2014, 02:05:43 PM

Perfect!!
Many thanks!

Title: Re: Wire colours
Post by: BooG on July 21, 2014, 11:13:12 AM

Just looking at the schematic in my Haynes manual....punctuating the slate/black cable running from the parking lamp to the connector block, is the number .75.   Does this refer to mm squared, or if not, ??? :-?

Title: Re: Wire colours
Post by: Ed Miller on July 21, 2014, 11:56:50 AM

Yep.

http://cgi.linuxfocus.org/~guido/javascript/awg.html

Title: Re: Wire colours
Post by: BooG on July 21, 2014, 12:28:21 PM

Nice one!
Now, it appears I can only get cable at either .5mm (11amps), or 1mm (16.5amps). What would be preferable? I'm assuming 1mm at the mo...

Title: Re: Wire colours
Post by: Barry on July 21, 2014, 12:55:12 PM

The wiring harness pretty much standardizes on 0.75mm2 regardless of need but in the particular case of the parking lamp 0.5mm2 would be more than big enough.  There is no chance that the parking lamp could draw 11 amps.  

To get deeper into electrical circuit design the only other consideration is that in the case of a short circuit the loop resistance is low enough to blow the fuse. 0.5mm2 cable has slightly higher resistance but the length of wire is so short that it wouldn't remotely be a problem.  

Title: Re: Wire colours
Post by: BooG on July 21, 2014, 01:08:37 PM

Thanks guys!
That's why I love the forum!! ;D

Title: Re: Wire colours
Post by: BooG on July 21, 2014, 01:15:27 PM

and of course...they only do .5mm in slate, and not slate and black!!
They do 1mm in slate and black however...?? >:(
Stay true to the colour scheme and go with 1mm slate/black, or, slate grey .5mm??!

Title: Re: Wire colours
Post by: Barry on July 21, 2014, 02:58:15 PM

The bigger cable will function fine, it's going to be slightly larger in diameter that's all.