Which NEC section specifies the table values used to determine ampacity and protections for motors, especially those under 1,200 RPM?

Which NEC section specifies the table values used to determine ampacity and protections for motors, especially those under 1,200 RPM?

• A. NEC Section 430.6(A)(1)
• B. NEC Section 220.14(A)
• C. NEC Section 230.79
• D. NEC Section 430.24

Answer: (A)

Sizing motor circuits relies on the dedicated motor tables in Article 430, which translate the motor’s full-load current into the required conductor ampacity and overcurrent protection. The rule that directs you to use those table values for determining ampacity and protection specifically for motors, including low-speed ones under 1,200 rpm, is found in the section that governs motor conductors and protective devices. This connection to the motor tables is why this section is the correct reference—it’s the part of the NEC that ties motor ratings to the exact ampacity and protection values you must use. Other sections cover non-motor load calculations or service rules and don’t provide the motor-specific table-based sizing.

Sizing motor circuits relies on the dedicated motor tables in Article 430, which translate the motor’s full-load current into the required conductor ampacity and overcurrent protection. The rule that directs you to use those table values for determining ampacity and protection specifically for motors, including low-speed ones under 1,200 rpm, is found in the section that governs motor conductors and protective devices. This connection to the motor tables is why this section is the correct reference—it’s the part of the NEC that ties motor ratings to the exact ampacity and protection values you must use. Other sections cover non-motor load calculations or service rules and don’t provide the motor-specific table-based sizing.