Charlie........please go down to your local auto parts store and spring for a couple rolls of 12 or 14 gauge automotive wire...Black or Red for the hot side and white for the negative side... why mess with electrical zip cord on a tractor. You can also get the plastic loom to put the wire in to protect it. This is the same product that Kubota uses in the tractor. If electrical cords were that good for automotive use, then the tractor manufacturers would use it in place of automotive wiring. Use the correct product for the job and it will look better and better yet, it will last longer and perform better in the end. While you are there, get some shrink wrap tubing and use it on all splices and terminal ends. The shrink wrap will protect the terminal ends from moisture intrusion. Personally, I would rather see a fuse closer to the point where you take the power from. Consider adding one fuse to protect the wire from point of origin to the plastic box. That way, if the wire gets damaged, the tractor wiring will be protected. There is something to be said about a job that is done by the owner that is done in a professional manner. You have done a great job on the rest of the install and it look very professional. Finish it up using the correct wiring materials and it will be a job that you can be really proud of. If you take your tractor in for service, the people that will work on it will be impressed by the quality of the work and the fact that it wasn't cobbled together.
One last thought.... put some silicone sealer around that chrome hole plug to keep the elements out... I hope that you take this advise in the good manner that it is intended..... I am passing on to you that which was hammered into my head by a friend and mechanic when I was very young..... Do it right the first time or make time to do it over a second time.... If you need any more help, advise, or other information, please ask, because that is what we are all here for.... to learn and share information... And that is something that you know better than me, because you have been here longer!
