What is the maximum number of switches or circuit breakers that may comprise the disconnecting means as specified for 225.30?

What is the maximum number of switches or circuit breakers that may comprise the disconnecting means as specified for 225.30?

• A. Four
• B. Six
• C. Two
• D. Eight

Answer: (B)

The key idea is that the service disconnecting means for feeders has a defined limit on how many devices can be grouped together. For a single disconnecting means, you may have up to six switches or circuit breakers. This keeps the disconnecting means compact, clearly operable, and located in a single accessible spot, while still allowing all ungrounded conductors to be simultaneously opened. If more than six devices were needed, you’d need an additional disconnect or a different arrangement to maintain a single, clearly identifiable disconnecting means. So the maximum is six.

The key idea is that the service disconnecting means for feeders has a defined limit on how many devices can be grouped together. For a single disconnecting means, you may have up to six switches or circuit breakers. This keeps the disconnecting means compact, clearly operable, and located in a single accessible spot, while still allowing all ungrounded conductors to be simultaneously opened. If more than six devices were needed, you’d need an additional disconnect or a different arrangement to maintain a single, clearly identifiable disconnecting means. So the maximum is six.