User`s guide

User’s Guide — 45
Finding Voltage Drop Wire Size
A 20-amp single-phase 208-volt load will
be located 175 feet away from the
source. Assuming a 3% allowable volt-
age drop, what is the size of 75°C con-
ductor re-quired for this branch circuit?
Steps Keystrokes Display
Reset calculator [On/C] 0.
Set to 75°C [Set] [7] 3Ø 75 Cu 0.
Set to 1-phase [Set] [1] 1 PH
Enter amps 20 [Amps] 20. AMPS
Enter volts 208 [Volts] 208. VOLT
Enter distance 175 [Length] 175. FEET
Enter allow. VD% 3 [VD%] 3.0 DROP V %
Find wire size [WireSz] 8 CU
AWG VD WIRE SIZE
Find actual
voltage drop [VD%] 5.4 DROP V
Find % v.drop [VD%] 2.6 DROP V %
5060-UG-B-Composite 4/4/03 12:37 PM Page 47