IEC 311 QUIZ Question and answers rated A+ 2026

IEC 311 QUIZ Question and answers rated A+ 2026

Refer to the nameplate shown in Figure
230.128. The branch circuit for the motor is
supplied from a 277/480-volt, 3Ø, 4-wire 2023 NEC: 430.250 (Table)
panelboard. The minimum size branch circuit | 2023 NEC: 310.16
conductors for the motor are AWG. (Table)
T.FLC = 42/21 21 × 1.25 =
26.25 = 26 A

10 AWG
The correct answer is: 10


1. The nameplate for a 15 HP, three-phase motor
shows an FLA of 35 amps at 230 volts. What
minimum size SOO cord is required to connect 2023 NEC: 430.250 (Table)
the motor to the branch circuit? | 2023 NEC: 400.5(A)(1)
(Table-Col A)
Table FLC = 42 amps 42 ×
1.25 = 52.5 A mc009-1.jpg
4 AWG
2. Refer to the nameplate in Figure 230.127. The
The correct answer is: 4
branch circuit for the motor is supplied from a
120/208-volt, 3Ø, 4-wire panelboard. What is 2023 NEC: 430.250
the minimum size (3
(Table)
| 2023 NEC: 400.5(A)(1)
(Table-Col A)
wire + ground) SO cord that could be used as a flexible T.FLC= 24.2-
22/11 24.2 ×
connection for the 1.25 = 30.25 = 30 A
motor?
8 AWG
The correct answer is: 8
1/
5

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5