Can you have a much longer positive wire in a circuit?

[Rivers & creeks]

I want to have a switch for the nav lights in the cockpit. There's a positive bus bar in the console so I thought I'd take a +ve tail from that to a switch, then run a single wire to the positive junction for the nav lights. The -ve for the lights can stay where it is.
The upshot will be that the +ve side of the nav lights circuit will be 3m longer than the -ve - is this OK or does it present a problem? Many thanks. Simon

 

[stevebirch2002]

It will make no difference how long each is - Longer the wire, the more voltage drop so ensure the wire is of an adequate csa.

 

[Rivers & creeks]

Thanks.

 

[William_H]

Just to add to Steve's response where the wire carrying a lot of current has to be extended for switching a relay is used. This is in effect a remotely controlled switch. This is used in cars for horn headlight or starter motor.
It should not be necessary for nafv lights due to low current. olewill

 

[samwestwood]

Might just be me but why do you need a second switch.
You only set them once then they stay on till morning or till you stop.

Seems like a lot of messing for nothing

 

[Csail]

Won't make much difference but whats the point?

 

[Moonshiners]

don't forget an inline fuse...

 

[affinite]

When you say you have a +ve busbar in the console, how is that fed? You are in effect going to run your nav lights from a circuit design to run cockpit instruments. Be careful that your bus bar is adequately supplied (in terms of csa) and fused and that the switched feed to your nav lights is also properly fused.

 

[Rivers & creeks]

Thanks for all the replies, yes the bus bar and its cable are up to the job. The reason for doing it is that the main switch panel is down in the starboard hull and a few times at dusk single handed I've not wanted to leave the cockpit to go and switch them on, and then kept leaving it until it's past the point they should have been on.