Voltage drop spreadsheet
The following voltage drop calculations were all based on the resistance values in Table 8 Chapter 9 of NEC (National Electrical Code). This spreadsheet only considers voltage drop.
Many other factors affect wire size. Please refer to entire NEC when sizing wire. Spreadsheet has three sheets beside main one with calculations:
- Printable VD calculations
- Printable Table Parallel wires
- Printable Table 310-16
| Software: | Voltage Drop Calculator – Albany Technical College |
| Version: | 28.8.2004 |
| Developer: | Albany Technical College |
| Size: | 545 kB |
| Price: | – |
| Download: | Here 🔗 (Get Premium Membership) | Video Courses | Download Updates |
Gentlemen,
If i am laying a DC cable of 200 meter from UPS to the main load (Battery charger), in that case how can i calculate my voltage drop for this cable. As per my knowledge DC power has no polarity and less losses with no P.F consideration compared to AC power. So voltage drop will it be applicable here if so how please support….
Definitely Yes. the Volt drop depends on the Resistance of the Cable, The current (AC/DC) and the length of the cable. there are different ways to calculate the volt drop, but the most simple way is: finding out the Resistance of the cable per meter, the maximum current of the load and the length of the cable in meters. you will have to then use Ohm’s law to get the Total Voltage drop of the cable.
current and the length of the cable plays a huge role on the cable volt drop value
kind regards
Tankiso Komako (EC&I Engineer)
I need the maximum power supply length of each circuit
thank you
l need change voltage please
vaiable voltage
The formula for minimum voltage drop is not correct.how is possible for 240v supply and 228v drop
The derating factors need to be included as a part of installation, also need to check for motor [running / starting] application.
Has anyone updated this program? I’ve been using it for a while and really like the way it works, but I’d love to have it updated for NEC 2008 & 2011..