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Answer :
Final answer:
Type MI cable is not a permitted wiring method for connecting the controller of a fire pump to the pump motor according to the NEC standards. Instead, RMC, RNMC, and IMC are the accepted methods. Implementing proper wiring methods ensures safety and reliability in fire pump operations.
Explanation:
Permitted Wiring Methods for Fire Pump Controllers
When installing a fire pump, it's critical to adhere to the National Electrical Code (NEC) guidelines, which specify the permitted wiring methods from the controller to the pump motor. The options listed include:
- RMC (Rigid Metal Conduit)
- RNMC (Rigid Non-Metallic Conduit)
- IMC (Intermediate Metal Conduit)
- Type MI cable (Mineral Insulated Cable)
Among these, Type MI cable is generally not permitted for wiring fire pump circuits. This is due to the specific requirements surrounding the protection and functionality of the fire pump in emergency situations. On the other hand, RMC, RNMC, and IMC are conventional methods allowed for this application, as they provide the necessary mechanical protection and grounding needed for the reliability of fire pump operations.
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