(return current is not the same as what it sent), /QUOTE]
Well that will never happen and it's not supposed to. That phenomena is called power factor. With the exception of purely resistive loads like electrical heaters and incandescent light bulbs, ALL electrical devices return a portion of the current it consumes. The device will draw a certain amount of power and return a smaller amount over and over 60 times per second. That is normal and well-known and it says this on the sticker on the back of your PSU. Yes, if the power factor of an electronic device is low it can cause a circuit breaker to trip because more current is flowing through the breaker. Power consumption is not measured in amps, it's measured in watts and the two do not always scale. A device can use a high amount of current while using a modest amount of power if the power factor is low (e.g. it draws 1000W from the wall, but returns 500W AKA power factor of 0.50).
In any case, the PF of a PSU should be relatively high. The high side caps exist specifically to keep the power factor higher. The more caps you have in line with the input of an electronic device, the higher the PF will be. They actually make building-wide capacitor banks specifically to increase your PF because if your PF is too low the power company will fine you (usually limited only to industrial applications). Electrical motors typically have poor PF rates, consuming far less power than actually drawing, which is why industrial plans with lots of electrical motors will invest in capacitor banks.
