User Manual

User’s Guide — 37
Wire Sizing Based
on Insulation Rating
Wiring is being installed in a 240 volt,
single-phase system rated at 30 kVA.
What is the wire size needed if you use
60°C copper wire?
Steps Keystrokes Display
Clear calculator [On/C] [On/C] 0.
Set to 1-phase [Set] [1] 1 PH
Set to 60˚C [Set] [6] 1Ø 60 Cu 1 PH
Enter kVA 30 [kilo-] [VA] 30. KVA
Enter volts 240 [Volts] 240. VOLT
Find amps [Amps] 125. AMPS
Find CU wire size [WireSz] 0 CU
AWG WIRE SIZE
Re-sizing Wire Based on
Different Insulation Ratings
What wire size is required for a 75°C
copper branch circuit carrying a load of
260 amps? What would the wire size be
if 90°C copper is used?
Steps Keystrokes Display
Reset calculator [Set] [x] [On/C] 0.
Set to 75°C [Set] [7] 3Ø 75 Cu 0.
Enter amps 260 [Amps] 260. AMPS
Find wire size [WireSz] 300 CU
AWG WIRE SIZE
Change to 90˚ [Set] [9] 0000 CU
AWG WIRE SIZE
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