Hi everyone I'm currently building a 5f1 using RobRobs layout , not a kit ! I have several threads on which wire gauge you should use, however only a few on the voltage rating. I already have some wire which says 300/500 V on them, (awg18) , which I have read means u0/u where u0 is RMS voltage to ground , and u=1/sqrt(3)*u0 for three phases (approximately). Do you know if this wire is ok for my champ ? To my understanding, a champ would reach around 400 volts. I have a centertapped PT with 325 Volt on the primary.