Original poster: "harry" <harry-at-prcn-dot-org> I had a similar problem with my 4x15\30 power supply turned out one leg of one transformer was bad and caused the safety gap to fire continuously,I am currently running 3x15\30 with safety set at .25" per side for a .5" total and the safety no longer fires. Also did you phase the transformers so they don't fight each other ? hope this helps