Calculated Industries 5070-A User Guide - Manual (Page 41)

40 — e
lectri
c
alc
® P
ro
KeysTRoKe DIsPlay
 
0.
1. Set to 3-Phase:
 
(3Ш)
3Ш
3 Ph
2. Set to 75 º C:
  (75º)
3Ø 75
3 Ph
3. Set to Copper (if necessary):
  (Cu/Al)
3Ø 75 Cu
3 Ph
4. Enter Amps:
   aMPs 20.
5. Enter Volts:
   
VolT 230.
6. Enter Length (Feet):
   
feeT 150.
7. Enter Wire Size:
   aWG 10 Cu
WIRe sIZe
8. Solve Voltage Drop:

DRoP 6.4
V
9. Solve percent Voltage Drop:

DRoP 2.8
% V
finding Voltage Drop Wire size
A 20 Amp, Three-Phase 208 Volt load will be located 175 Feet away
from the source. Assuming a 3% allowable Voltage Drop, what is the
size of 75°C conductor required for this branch circuit? What is the
resulting voltage drop?
KeysTRoKe DIsPlay
 
0.
1. Set to 3-Phase:
  (3Ш)
3Ш
Ph
(cont’d)