52 — ElectriCalc Pro
Finding Motor Branch-Circuit
Wire Size and Conduit Size —
Same Wire Type & Size
What size THHN copper wire and RMC
conduit are needed to connect a 10 HP
1Ø induction motor to a 115 Volt source?
Steps
Keystrokes
Display
Clear calculator
o o
0.
Set to 1-phase
S 1
1 PH
Set to 60º C
S 6
1Ø 60 Cu 1 PH
Enter Volts
1 1 5 U
VOLT 115.
Enter Horsepower
1 0 h
IND 10. HP
Enter cond. type
8 S C
RMC nonE
COND
Display full load
Amps
A
FLC 100. A
Find wire size
S w
AWG 0 CU
WIRE SIZE 125%
Find wire ampacity
w
0 125.0*
WIRE A125%
Find conduit size
C
RMC 1.25 in
COND SIZE
Find total # wires
C
2. TTL WIRES
Find conduit fill %
C
FILL 24.3
COND %
Find act. fill area
C
FILL 0.3710
TTL WIRE AREA
Find rem. area
C
REM 0.1021
WIRE AREA
Set to 3-phase
S 3 o
3Ø 60 Cu 0.
and Clear
