I'm not trying to cause trouble, but...
I have to respectfully disagree with Vic's statement about DC coils and inrush current. DC coils DO have an inrush current value, and for the same reason as AC coils.
I don't profess to be a magnetics expert but here goes. The coil is storing energy in the form of a magnetic field. When it is first energized the current doesn't need to travel through the whole coil before it establishes the magnetic field. As soon as it hits the coils, the current starts forming the field. While the rate of field formation is self-limiting, this rate definitely allows currents higher than the DC resistance of the coil would indicate.
Short story is don't discount the effects of inrush currents, especially in big DC coils which seem to have a larger inductance to resistance ratio. The inrush current to holding current ratio is higher with these coils.
Keith