40 — ElectriCalc Pro
(Cont’d)
Steps
Keystrokes
Display
Reset calculator
[Set] [x] [On/C]
0.
Set free air mode
[Set] [5] 3Ø 60 FrAir Cu 0.
Enter amps
500 [Amps]
500. AMPS
Find 1 wire size
[WireSz]
500 CU
AWG WIRE SIZE
Find 2 wire size
2 [ParSz]
000 CU
PAR WIRE SIZE
Find 3 wire size
3 [ParSz]
0 CU
PAR WIRE SIZE
NOTE: Parallel wire sizes smaller than
1/0 will be displayed as nonE.
Finding Derated Wire Size
What is the derated wire size required
for nine 75°C copper wires, each carry-
ing a maximum load of 65 amps?
Steps
Keystrokes
Display
Reset calculator
[Set] [x] [On/C]
0.
Set to 75°C
[Set] [7]
3Ø 75 Cu 0.
Enter amps
65 [Amps]
65. AMPS
Find normal
wire size
[WireSz]
6 CU
AWG WIRE SIZE
Find derated
wire size
9 [Set] [ParSz]
3 CU
D/R WIRE SIZE
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