Pape, welcome to Axiom. Assuming that what you're asking about is the current flow required by the EP500 during its operation, the relevant form of Ohm's Law is current equals [square root]power/impedance. Using the maximum continuous power capability of the EP500 amplifier in the specs of 500 watts, the square root of 500/4 is 11.2 amperes. Note however that 500 watts will rarely if ever be actually used. At a more typical maximum power usage of 100 watts the number is 5 amperes, and at less than maximum output using a few watts about 1 ampere of current flow is taking place.
These are what might seem to some to be relatively small numbers if they've been impressed by ridiculous "high current" claims of some amplifiers(e.g., 50 or more amperes), but current requirements are controlled by Ohm's Law, not manufacturer hype. So, there would be no specific "amperage recommendations" and typical home electrical wiring is more than capable of meeting any possible requirements.
