usually most companies are so hacked together and informal about the engineering process that it hardly matters what language you use
I would generally recommend however, a simple request like changing wire gauge, you should humor it, that is a complicated argument to get into and its not worth doing so unless your talking about hundreds of feet of wire
A good enough reason to replace the wiring is because it looks better for visiting dignitaries and such.
Its very common in engineering that replacing the wiring fixes things. Someone might just be going through a standard trouble shooting list without giving it much thought. And if you do it your getting paid for a strait forward job.
Because it sounds like a superior is causing your problems. If its your coworkers that are not involved in the project in anything but a informal brain stroming capability, time to cut that resource off, it won't effect you professionally. It might seem smart to socialize about how to do work, but actually it can get you in alot of trouble. So if its above you, humor it, and if its to the left or right of you, just stop soliciting advise about this issue.
Don't make a war with your boss but don't take advice from unofficial fools
aka no group chat