related to electric goodshow much is thge consuption of 1/4 hp motor
This is probably a split phase capacitor start motor where all or part of the capacitance used in starting is switched out once it is running, and that would be the first place I would have looked as you have done. The rcd rating is about 12 times the full load current and this would not protect it against an overload, so it sounds like there is a fault in the motor or the feed to the motor and the only way to find it is to take the circuit apart and do insulation checks on each bit. Intermittent faults like this are hard to find as when a test is carried out the fault doesn't always show.
0.25 hp = 186.424968 watts
Assuming you mean amp draw for consumption, there are lots of small differences that vary motor current on a motor to motor basis. The best way is to look at the motor. Look for FLA (full load amps) on the name plate. If you don't have the motor on hand, typical 1/4 Hp motors will pull around 5A at 120VAC and 2.5A at 240VAC single phase. Your mileage will vary depending on manufacturer.
Single phase (what comes out of your wall outlet) as opposed to three phase motors that are usually used for motors 1 Hp and up in industrial applications. 3 phase is more efficient on large motors.
