Lighting contactors do come in electrically held as well as mechanically latching types.
Out here in SoCA, if the DP contactors are used, an electrical inspector will very often cite 110-3 Examination, Identification, Installation and Use of Equipment as a basis for turning them down (via their powers in 90-4).
Also, plans many times use the wording "Lighting Contactor", which precludes the use of the DP contactors.
The combination inspectors usually don't know what they're looking at anyway (a box full of wires and little square things), and approve them without a second thought.
S
