Calculated Industries 5065 User Manual - User’S Guide — 43
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User’s Guide — 43
Finding Three-Phase
Voltage Drop
A 20 Amp, three-phase load is being fed
by a 230 Volt source located 150 Feet
away. The installation specifications
require 75°C #10 THW stranded copper
conductor. What is the Voltage drop on
this branch circuit?
Steps
Keystrokes
Display
Clear calculator
o o
0.
Set to 75°C
S 7
3Ø 75 Cu 0.
Set to 3-phase
S 3
3Ø 75 Cu 3 PH
Enter Amps
2 0 A
AMPS 20.
Enter Volts
2 3 0 U VOLT 230.
Enter Length(feet)
1 5 0 l FEET 150.
Find VD wire size
w
AWG 10 CU
VD WIRE SIZE
Solve volt. drop
v
DROP 6.4 V
Solve % v.drop
v
DROP 2.8 V %
NOTE: See “Settings” for a list of
Permanent Values/settings. Changing
these settings may affect your calculations.