Final answer:
The NEC requires fire alarm circuits to be grounded in accordance with Article 250, which is crucial for safety in preventing electric shock or fire in the event of faults like short circuits.
Step-by-step explanation:
The question provided relates to grounding requirements for fire alarm circuits and equipment as per the National Electrical Code (NEC). According to the NEC, the correct answer to this question would be Article 250. This Article, in general, details grounding and bonding requirements for electrical systems. In the case of fire alarm circuits, proper grounding ensures that in the event of a fault, such as a short circuit, the electrical current has a safe path to the ground, reducing the risk of fire or electric shock.
When considering integrated concepts of electrical safety, it is critical to understand the implications of grounding. For instance, if a person comes into contact with a grounded metal case during a short circuit and they are wet, their body resistance would be low, which could allow a dangerous current to flow. Using the given values, one can calculate the potential dangers in such scenarios, emphasizing the importance of properly grounding electrical systems.