As Far the NEC say about the 240 volt repectales there is not much.
But some area have spefic requriement other wise really almost the same as convetnal 120 v repectale circuits is but really it pretty much depending on what you are planning to use it.
Is this being used in the Resdetnail garage or commercal location ?? [ it can change a bit someway.,,]
Merci,Marc