How many feeders or branch circuits are allowed to supply a building served by a service disconnecting means?

How many feeders or branch circuits are allowed to supply a building served by a service disconnecting means?

• A. One
• B. Two
• C. Three
• D. Six

Answer: (A)

In the context of the National Electrical Code (NEC), particularly Article 225, there are specific provisions related to the number of feeders or branch circuits allowed to supply a building. The correct answer states that only one feeder or branch circuit is permitted to supply a building when there is a service disconnecting means in place. This regulation ensures a clear and manageable electrical system. By limiting the supply to a single feeder or branch circuit for the building, the NEC aims to minimize complexity and enhance safety. A unified supply can also facilitate easier maintenance and identification of circuit issues, which is crucial for troubleshooting and ensuring that the electrical system operates correctly. Moreover, having a single feeder can help in load calculations, as it reduces the likelihood of overloads and simplifies the distribution of electricity within the building. In situations where multiple feeders or branch circuits were allowed, managing potential overloads or ensuring compliance with code requirements could become significantly more challenging. Understanding this aspect of the NEC helps reinforce the importance of safety and efficiency in electrical installations, emphasizing that each building’s electrical supply should be inherently simple to manage while still meeting all necessary electrical demands.

In the context of the National Electrical Code (NEC), particularly Article 225, there are specific provisions related to the number of feeders or branch circuits allowed to supply a building. The correct answer states that only one feeder or branch circuit is permitted to supply a building when there is a service disconnecting means in place.

This regulation ensures a clear and manageable electrical system. By limiting the supply to a single feeder or branch circuit for the building, the NEC aims to minimize complexity and enhance safety. A unified supply can also facilitate easier maintenance and identification of circuit issues, which is crucial for troubleshooting and ensuring that the electrical system operates correctly.

Moreover, having a single feeder can help in load calculations, as it reduces the likelihood of overloads and simplifies the distribution of electricity within the building. In situations where multiple feeders or branch circuits were allowed, managing potential overloads or ensuring compliance with code requirements could become significantly more challenging.

Understanding this aspect of the NEC helps reinforce the importance of safety and efficiency in electrical installations, emphasizing that each building’s electrical supply should be inherently simple to manage while still meeting all necessary electrical demands.