FWIW Conduit or close, more flexible, facsimile also works. That is what we did when I was growing up on the farm 40+ years ago. The mice or rats chewed a wire only once at our place. The replacement was protected.

IIRC our big problem with trailer lights was loss of ground do to cheap materials and corrosion.

Last edited by Bill D.; 10/13/15 08:25 PM. Reason: Clarification
[Linked Image]
Be Brave Enough to Suck at Something New!