Originally Posted by jadnashua
120vac RMS has peak voltages considerably higher than 120vac.
if the RMS value is 120 then it would be 120 times 1.414 = 169.68
169.68 times .707 = 119.96
Edited to add;
The cosine of the angle divided into 1 times the RMS voltage will give you the peak voltage of the sine wave. 1/.707*120=169.68 volts
Last edited by jwelectric; 07-06-2012 at 08:47 AM.