What is the differences between these two items? Is one physically larger than the other and that it? Both are rated at the same capacity and duty cycle. If one is more robust in construction then that is the road to take, but the cost is substantially more.
Here is another question I'm hunting an answer for:
I have a 150A main lug only, 18 space panel with plug in stabs. I'm wondering at what point do requirements change for bolt in, rather than the plug in style? The front faceplate retains all inserts solid to preclude loosening, but I'm more used to bolt in style than the plug in variety although I see both in use routinely. All are NEMA 1 rated for indoor use.
Thanks for any assist.