I have a 40VCT .25A transformer and I'm wondering what those numbers mean..
does the 40VCT mean 40VAC from the center tap? If so across its full secondary its 80VAC? and the .25A means that it can handle at most .25A across its secondary coil(since its a step down from 120VAC the max current in its primary should be smaller... ~80/120*.25?).
Also should I assume these are all RMS values? When I put my variac up to100VAC and hook it up to my transformer I get about 40 volts across the hole secondary(hence 20V's across from the center tap). But this means that at the mains(117VAC?) I'll be getting more than 40VAC across the full secondary? Is this ok to have the transformer have a little more than its voltage rating?