in an ac electrical equipment what do the rated values(like power,current,voltage) signify? I mean which of them are rms and avg quantities and why such values (like the rms) are specified instead of other values(like peak values)?

Question

anonymous · Answer

@Mashy

anonymous · Answer

rated values are always RMS!!

anonymous · Answer

unless its specified Otherwise!

anonymous · Answer

why rms?

anonymous · Answer

cause RMS is always the DC equivalent.. its always nice to think in terms of DC rather than AC.. 

Especially power.. if u want to calculate on an average how much power is consumed or dissipated .. it turns out

P = vrms into i rms.. 
therefore rms values are DC equivalents!

anonymous · Answer

don't ask me to derive that.. cause i hate using equations :P here

anonymous · Answer

ok..don't worry I wont :)

kropot72 · Answer

If the voltage and current are in phase, the average power is given by:
$$P _{average}=V _{rms} \times I _{rms}$$