If that was for me then no, those don't really work when the highest EU outputting thing in your entire base is capable of just 128 EU
Eh, you might be able to get away with it, the loss is only 0.5 EU/block, and it rounds down. As long as you don't have loss in the other cables leading up to the machines, it should work and allow you to power just one of the machines at a time.