I'm not sure what you mean. If you mean an AC voltage that is rated at 110v but actually goes higher than 110v ? That would be like rating RMS voltage?
Are we talking wattage, voltage or amperage? The AC amperage and voltage RMS values will be lower than peak, period.
The Peak is actually the top of the AC peak but if you line up all the peaks (absolute value of all positive and negative peaks) and draw a line from peak to peak, you will see that there is plenty of space under that line, but above the area where the peaks overlap. This space represents periods where the current is lower than peak. Rectified AC current has a ripple effect to it where a true DC source does not. Therefore the RMS value is always less than peak and an AC Peak current of 110 amps is less than 110 amps DC continuous.
If it is rated in watts as resistors usually are, then they would be able to handle equal amounts of power as you say because its a different measurement.
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