Control circuits shall be two wire, one side grounded, having a nominal voltage of 150 volts or less. The circuit shall be connected to a branch circuit that can be fused at not more than the value appropriate for the rating of the electrical components included in the circuit. Safety controls or protective devices shall interrupt ungrounded conductors. Safety controls shall not depend on electricity to attain the off position.
N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 4-8.2