Which NEC article covers main service disconnects in multi-tenant buildings?

• A. Article 230
• B. Article 250
• C. Article 404
• D. Article 314

Answer: (A)

Main service disconnects are governed by the section that covers Services. This article defines the service disconnecting means and service equipment, including how and where the main disconnects must be located and how many disconnects are allowed. In a multi-tenant building, the point at which power can be interrupted to the building falls under these service rules, not under other topics like grounding (which is Article 250), switches (Article 404), or boxes and fittings (Article 314). So Article 230 is the one that covers main service disconnects.