User’s Guide — 31
The
ElectriCalc Pro
can calculate the
full load current (Amps) of a motor,
based on phase, Voltage and motor
(synchronous, induction, or DC). It uses
NEC Tables 430-247, 430-248 and
430-250 to determine the motor full load
current. (If you enter a value for HP or
Voltage that does not correspond to
these tables, the unit will display nonE).
The
ElectriCalc Pro
can also calculate
an equivalent Horsepower for an induc-
tion, synchronous or direct current motor
based on a Voltage, phase and full load
current. When calculating motor HP from
an entered amperage, a result not
directly matching a value in NEC Table
430-247, 430-248 or 430-250 will cause
the calculator to choose the next higher
table value for motor Horsepower.
Finding Single-Phase Full Load
Current
A 2 HP induction motor operates on 230
Volt, single-phase power. What is the full
load current for this motor?
Steps
Keystrokes
Display
Clear calculator
o o
0.
Set to 1-phase
S 1
1 PH
Enter Volts
2 3 0 U
VOLT 230.
Enter HP
2 h
IND 2. HP
Find full load Amps
A
FLC 12. A
Motor Horsepower
