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Replacement roof wiring

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andymorris

Member
Hi - I’m going to replace the wiring in the e89 roof to rid the car of the recurring roof problems. I have researched it all but can’t find a definitive post about the best type of flexible wiring to use ie the diameter and type (possibly LifY wiring). Any guidance greatly appreciated. Based in the uk. TIA
 
https://www.ebay.co.uk/itm/361296232202?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=h2N0B68PQuS&sssrc=4429486&ssuid=MJ_SDuRqQhu&var=630677896144&widget_ver=artemis&media=COPY
 
andymorris said:
Thanks. So the 20 AWG gauge 2mm diameter wire is the one to go for? Cheers
Click to expand...

Might be better with 18 gauge. I know others on here have had success with the 20 gauge, though.
 
i recently replaced mine with 18 gauge from here....perfect for the job
https://www.ebay.co.uk/itm/361296232202?var=630634243796
 
I'm generally using 0.25 mm² lify wires.

Could you please translate it into your 18/20 gauges?
 
RobbiZ4 said:
I'm generally using 0.25 mm² lify wires.

Could you please translate it into your 18/20 gauges?
Click to expand...

18 AWG
1.02 mm
20 AWG
0.91 mm



12 AWG
2.06 mm
 
Gauge Diameter Diameter Area
AWG (mm) (inch) (mm²)
18 1.0237 0.0403 0.823
19 0.9116 0.0359 0.6527
20 0.8118 0.032 0.5176
21 0.7229 0.0285 0.4105
22 0.6438 0.0253 0.3255
23 0.5733 0.0226 0.2582

Mike
 
Thanks!
But,

0,25 mm² is sufficient for sensor wires. Flexibilität ist more important than thickness. :rofl:
 
Thank you guys for the replies. In the table below the columns from left to right are as follows gauge, colour, outer diameter, wire diameter, maximum current, strand diameter, number of strands. I am thinking the 22 or 24 gauge are the best options. Do you agree!

IMG_5445.jpeg
 
I also used 0.25 LiFY, but I doubled up and replaced each wire with two new ones.

Bought them of german eBay.
 
Hey guys,

These sensors are operating with 4 milliamperes! There is no reason to double each wire.
 
RobbiZ4 said:
Hey guys,

These sensors are operating with 4 milliamperes! There is no reason to double each wire.
Click to expand...

I think Robbi they are placing a second redundant wire either in parallel and wired in or not wired in for subsequent serviceability..
 
RobbiZ4 said:
These sensors are operating with 4 milliamperes! There is no reason to double each wire.
Click to expand...
It's only added as a redundancy, in case (God forbid) it will break again.
 
RobbiZ4 said:
flybobbie said:
I just used 10amp mains wire, like to see it break!
Click to expand...
What about a WLAN solution to all sensors?
Click to expand...

Fibre optic cable, pulsed light reflected off small mirror when limit is reached.
Reasonably flexible, needs no power only at the module.
Won't go rusty.
 
I have fibre optic Christmas decoration, can bend the fibre to about 10mm radius.
Don't know long term life being bent back and forth.
 
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