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National Electrical Code Articles and Information

NEC Quiz: Article 430 Answers

by Mark Lamendola

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  1. Yes, use Figure 430.1. This shows which Part of Article 430 applies to a given aspect of motor application and installation.

  2. Table 430.5 provides a summary of other articles that may apply. For example, if the motor is part of a fire pump, then Article 695 will apply. Please note that Chapters 1 through 4 apply generally to all installations.

  3. It's one that is arranged for starting by first energizing part of its primary (armature) winding and, subsequently, energizing the remainder of this winding in one or more steps [430.2].

  4. You base it on the motor nameplate current rating [430.6(A)(2)].

  5. Lower. The value for the motor marked D is 4.0 to 4.49; the value for the motor marked K is 8.0 to 8.99 [Table 430.7(B)].