I have been helping with the rewire of my boat and have found a good way to run wires or messenger twine. I have 1.5 mm Birch faced ply which is sold in 5' x 5' sheets. The ply is easily cut with scissors and the original purpose was to make templates with. However, if a strip 1 cm wide is cut it can be used to find a passage behind bulkhead and headlining, for example. It is both stiff and supple which allows it to bend around 90 degrees over about 2cm. I often find that once I have managed to get the messenger where I need it, the stiffness allows messenger to be moved backwards and forwards in an arc to find the hole that the wire must exit from. The end of the birch ply strip can be snipped about 2 cm long to grip the messenger twine / wire. It transformed many awkward runs to the point where it was a piece of cake. Some picture below where I ran a messenger between the new light bezel to the bulkhead where the trim will hide the remainder of the run to the overhead light power cable. In this case once I had the messenger at the exit, a bit of wiggling placed the end of the messenger close to the exit point,I then used some Monel wire to hook the green twine and pulled it through. The cable was attached and pulled through the narrow gap.
Hope this helps.




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