Trailer Brake Wire Size

**Hoges** · 3rd November 2012, 07:14 PM

Originally Posted by Pedro_The_Swift

I'm pretty sure the BSL is running on the edge cable wise

,,

I'm not even sure the 12 pin plug is rated to 20A

must check that one day

for info... I just checked my 12 pin Narva: 7 pins are rated at 15 Amp while the remaining 5 are rated at 35 Amp...
cheers

**slug_burner** · 3rd November 2012, 07:34 PM

I'd be surprised if the standard wiring could not deliver the current required. It is a matter of how hot the wire will get. Sure there will be a voltage drop but I think the melting insulation is going to be your first problem. And I think the electromagnets are going to be your current limiters. The electromagnets in the brakes are going to have much thinner wire and a much longer length of wire as it is wound multiple times around the metal core.

**SimonM** · 4th November 2012, 05:47 AM

Originally Posted by bee utey

Or you could add a 4mm 2 core to your el cheapo 5 core using spiral wrap.

This is what i have just dóne, but I ran 6mm dual core which fits nicely in the large round 7 pin trailer plug.

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