Q. If the output is wired for 15 or 30 volt will the VA rating be the same,and if input is wired for 115 or 240volt will this affect the VA rating.
A. Hi Charles, thank you for your question. The primary will not affect the VA rating, for full VA the two 12V secondary windings willneed to be wired in parallel, you will achieve half the VA if you just use either one of the 15V windings and the two 15V windings in series to get a 30V output.