But cables already act as fuses, with no lapis needed. A 128EU/t machine with a copper cable connected power line going to it will never explode, as if more than 128 EU tries to go down, the cable will just fry.
but what happens if you put a 32 eu/t machine and it gets a 128 signal ( when the EU fix goes live) then the machine pops? or the wire the machine connects to only? or all the wire in that chain?