Definitions for "Rms value"
(Root Mean Square) Current is also referred to as effective current and is the square root of the average of all the instantaneous currents (current at any point on a sine wave) squared.
The square root of the average of the squares (root-mean-square) of theinstantaneous values. It is the square root of the arithmetical mean of the squares.
(of a.c.) The square root of the average of the squares of the current ( I2) or the voltage ( V2), taken over a complete cycle.