For a lot of my 3ph 220v machines I use 30 amp renewable fuses. Well, often when the fuses pop the fuse body is burnt crispy and must be replaced. I go through 20 fuse bodies and 100 links a year. I went to order bodies from Grainger and noticed for the first time that "Renewable class H REN/RES Fuses are for use with non-motor loads. Hmmm, looks like something else I've been doing wrong forever. So, do I get the 5x for 10 second time delay fuses or stick to the renewables and try not to double the links up too often? Strictly a cost issue, I'm cheap but not too smart.
Also, is there a way to make better contact with the fuse holders? I use clamps on some of the worst holders but how about some type of conductive goo?