msshel0
Member
- Location
- Evansville, IN, USA
I have a Cal Osha question. the question is specifically about Title 8, 1604.24(c). it says:
(c) Voltages Permitted in the Hoistway or on the Car.
The maximum system or circuit potential permitted on any equipment in the hoistway or on the car shall not be more than 440 volts (nominal). Where the potential exceeds 120 volts, a grounding conductor shall be incorporated in the traveling cable. The type and size of the grounding conductor and the grounding fastening means shall conform to the requirements of the Electrical Safety Orders.
Exception: Installations provided with an inherent grounding system for the car.Installations provided with an inherent grounding system for the car.
(1) The nominal rated system or circuit potential for all circuits, in locations other than those specified, shall not exceed 600 volts except for driving motors of motor-generator sets.
My question is: I have a rack and pinion hoist. Does that fall under exception of an inherent grounding system? Can you tell me what the thinking is that would require me to use 440Vac instead of 480Vac that I can use anywhere else? I do not see that requirement in the NEC (620) nor in the A17.1 Elevator Code.
(c) Voltages Permitted in the Hoistway or on the Car.
The maximum system or circuit potential permitted on any equipment in the hoistway or on the car shall not be more than 440 volts (nominal). Where the potential exceeds 120 volts, a grounding conductor shall be incorporated in the traveling cable. The type and size of the grounding conductor and the grounding fastening means shall conform to the requirements of the Electrical Safety Orders.
Exception: Installations provided with an inherent grounding system for the car.Installations provided with an inherent grounding system for the car.
(1) The nominal rated system or circuit potential for all circuits, in locations other than those specified, shall not exceed 600 volts except for driving motors of motor-generator sets.
My question is: I have a rack and pinion hoist. Does that fall under exception of an inherent grounding system? Can you tell me what the thinking is that would require me to use 440Vac instead of 480Vac that I can use anywhere else? I do not see that requirement in the NEC (620) nor in the A17.1 Elevator Code.