I don't care much for 240VAC control ladders but if you must: Marc's drawing is lacking one or or two fuses for it to be warm and fuzzy with me. I would add two small fuses and holders to where you tap off of the line side of the contactor. I doubt that you would need more than 1 Amp slow-blows, depending on coil ratings and indications used. You will be much safer and your control wiring will far exceed your added protection instead of being far less than needed. My obvious assumption is that you aren't using #8 control wiring.
As you probably know, it takes less current to hold a contactor than to pick one. Many applications use a late-break aux contact to introduce resistance in series with the coil after it is energized to reduce coil dissapation and increase life.
Joe
