ELEC1212
Code Worksheet 8
NAME ________________________________ DATE_______________
THREE PHASE, MULTIPLE MOTORS
CODE WORKSHEET
The following nameplate data is given. The motors are supplied by a common feeder. All terminations are rated for
90 C and use THHN conductors. The motors are automatically started.
Motor 1
3 phase, 60 cycle, 480 VAC
15 HP
18 amps
50 C temp rise, 1.25 SF
Cont. Duty
Motor 2
3 phase, 60 cycle, 480 VAC
15 HP
18 amps
50 C temp rise
Code A, Cont. Duty
Fill in the following table:
COMPONENT
SIZE
NEC
REFERENCE
Feeder amps
430.250 Table
430.24
Feeder Conductor Size
430.24
310.15.B.16
Feeder Short Circuit
Protection
430.62.A
240.6
COMPONENT
Motor 1
Motor 2
NEC
REFERENCE
Computations
Computations
Disconnect
(Circuit Breaker)
Motor Branch circuit
short circuit protection
(Standard fuses)
Motor controller
Motor Circuit Conductor
AWG
Motor overloads (amps)
Motor FLC(Codebook)
amps
ELEC1212
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