PVstudent - Solar Education Resource
RSS Follow Become a Fan

Delivered by FeedBurner

Recent Posts

Advancement and Development of Electricity and Technology
Building Integrated PV
Bypass diodes
Determining low temperature that caused the inverter to go over voltage
Another NABCEP PVIP Certificate in the mail!

Most Popular Posts

Feeder PV Connections 705.12(D)(2)(1)(b)
Crimping MC4 Connectors without the tool
Converting kWh to pounds of CO2
NEC 310.15(A)(2) Exception, 10% or 10 feet or less for sizing conductors
PV Temperature coeficcients in V/C, mV/C and %/C with conversion examples


Advanced PV Course
NABCEP PV Installation Professional Exam Prep Course
NABCEP PV Technical Sales Exam Study Group (which will evolve into a full course)
PV Boot Camp and NABCEP Entry Level Exam Prep Course
powered by

HeatSpring PV Course Blog

Voltage Drop and Ohm's Law

From HeatSpring.com PV Boot Camp Discussion Board


I understand that resistance is a constant since it is tied to a material's properties, but you said that Ohms Law measures voltage drop or loss and I don't see that in the law.


Ohm's law states:
V = I x R

The V is going to be the voltage drop and not the system voltage.


If we have 2A, a 3 Ohm wire and a 100V system, then:

Vdrop = I x R
Vdrop = 2A x 3 Ohms = 6 Volts

Then if we want to figure out voltage drop percentage:

6 volts of voltage drop / 100V system = 6% voltage drop.

Let me know if you need more.


0 Comments to Voltage Drop and Ohm's Law:

Comments RSS

Add a Comment

Your Name:
Email Address: (Required)
Make your text bigger, bold, italic and more with HTML tags. We'll show you how.
Post Comment
Website Builder provided by  Vistaprint