CALCULATION PROGRAM

Voltage drop is the reduction in voltage due to the flow of current through the impedance in conducting line. Excessive voltage drop will result in unsatisfactory operation of electrical equipment, and represents energy wasted in the wiring system.


SYSTEM PARAMETER & CABLE INSTALLATION

VOLTAGE
220 V
380 V
Other
V
FREQUENCY
50 Hz
60 Hz
Other
Hz
CONDUCTORS RATING
70 °C
90 °C
Other
°C
POWER FACTOR
LAGGING
Dan =
mm
LENGTH OF CABLE
M.
LOAD CURRENT
A
MAXIMUM VOLTAGE DROP
%
MINIMUM CONDUCTOR SIZE
MM2
NOTE :
NEC RECOMMENDATIONS

1. Branch Circuits – maximum voltage drop of 3%. (The maximum total voltage drop for a combination of both branch circuit and feeder should not exceed 5%)

2. Feeders – maximum voltage drop of 3%. (The maximum total voltage drop for a combination of both branch circuit and feeder should not exceed 5%)

3. Services - maximum voltage drop of 5%.


x