User’s Guide — 31
Finding Current Load
A building with 120/240 volt 1Ø service
has the following loads:
Range = 7,800 VA
Heating = 15,100 VA
Dryer = 5,100 VA
Appliances = 8,900 VA
Lighting = 6,470 VA
What is the service load (amps) of the
circuit supplying this building?
Steps
Keystrokes
Display
Clear calculator
[On/C] [On/C]
0.
Set to 1-phase
[Set] [1]
1 PH
Add VA loads:
7,800 + 15,100 +
5,100 + 8,900 +
6,470 [=]
43,370.
Enter as VA
[VA]
43,370. VA
Enter volts
240 [Volts]
240. VOLT
Solve for amps
[Amps]
180.70833 AMPS
Finding Amps from Kilowatts
What is the amperage for a 75 kW load
connected in a 120/208 volt, 3Ø circuit?
Steps
Keystrokes
Display
Clear calculator
[On/C] [On/C]
0.
Set to 3-phase
[Set] [3]
3 PH
Enter kilowatts
75 [kilo-] [Watts]
75. KW
Enter volts
208 [Volts]
208. VOLT
Solve for amps
[Amps]
208.17918 AMPS
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