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# Electrical Calculations and Formulas

## Voltage Drop Wire Size Calculator

 Summary: Basic Electrical Calculations for Voltage Drop, Wire Sizing and Power Factors help you understand the requirements for Electrical Projects and Safe Circuit Wiring. © By: Dave Rongey

## Install a Generator and Transfer Switch Panel

### So Keep Watching So I Can Help You Wire it Right!

Electrical Calculations and Formulas

Voltage Drop Calculations
Voltage drop is an essential factor in determining the correct wire size to prevent voltage loss which will occur in long distance runs of electrical wire or cable.

Electrical Power Calculations
Electrical power calculations are required to determine the initial load requirement for any given circuit. Power Factors are identified and taken into consideration as well to maintain safety for circuit integrity and performance.

## Related Discussions About Electrical Calculations and Formulas

I am wanting to run wire under ground in a conduit 160' to a 100 amp panel from a meter panel at the pole which will supply power to a carport, future plans are to enclose the carport.

Voltage Drop Calculations
*Disclaimer
Other electrical projects will require extensive consideration when it comes to voltage drop due to the length of the electric service or generator sizing especially when motors will be used, such as well pumps.

To assist you in the planning process I have selected a few resources to help you in the calculation process that I find very helpful.

## Voltage Drop Wire Size Calculator

Calculate the Wire Size (Conductor) Based On The Project

This Calculator will determine the minimum size conductor needed based on a 3% Voltage Drop. It does not take into consideration other factors such as minimum ampacity based on the National Electric Code Table 310-16. (Allowable ampacity of conductors). Consult The Electrical Code for further details. Voltage Drop Calculation by Nick Debaggis.

Step #1 Describe the Electrical Circuit:

 Conductor Type Phase Voltage Copper Single Phase 120 Volts Aluminum Three Phase 208 Volts 240 Volts 277 Volts 480 Volts

Step #2 Describe the Application:

Distance in Feet, One-Way
Total Amperage of the Circuit

« This is the Minimum Wire Size

### More Electrical Calculations and Formulas:

Generator Sizing Calculator

Ohms Law Formula

Electrical Wire and Cable Selection

Codes for Electrical Service Panels

Electrical Codes for Grounding

Electrical Codes for Underground

Electrical Projects Guidelines

NEW - Code Lookup Tool:
Electrical Code Search

Electrical Power Calculators
Calculators to help you determine the size of generator required for your specific application.  Other calculators for unit conversions and other power related calculations.

Power Calculators

Disclaimer
* Ask-The-Electrician takes no responsibility for any false or misleading information. The use of these calculators are the responsibility of the user only. The results produced by these calculators are not guaranteed to be correct or applicable in all situations.The user must also understand the Electrical Code may or may not be legally acceptable in their area and may be modified or superceded by the locality in which the work is installed.

## A Complete Guide to Home Electrical Wiring

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Perfect for Homeowners, Students and Electricians
Includes:
Home Electrical Wiring - Room by Room
120 Volt Circuits
240 Volt Circuits
Multi-Wired Circuits
Wiring Methods for Installing Home Electrical Circuit Wiring
Electrical Codes for Home Electrical Wiring
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### More about Electrical calculations and formulas

Install an Electrical Sub Panel
Thinking about installing a Sub Panel? Here is what must be considered first, and you may find that you really do not need a sub panel at all.

Wire Size for a Home Electrical Service Panel
How to Size Wire for an Electrical Service Panel: What kind of wires do I need to get power to my home?

Moving an Oven and the Electrical Wiring
I am moving my oven in to an Island. What is required for 240 and 120 lines under the floor to the island.

Why a Home has Motors and Transformers Burning Up
Why is this home burning up lighting transformers and motors? How Voltage Drop can Cause Problems with a Home Electrical System.

How to Install Underground Electrical Cable for a RV Motor Home
How to Install Underground Cable for an RV Motor Home: Sizing Electrical Cable for an RV Motor Home Panel, Examples for Determining Underground Electrical Cable Sizes.

How to Plan Electrical Circuits for a Home
I am concerned that my panel is getting overloaded, I have a 100 amp sub panel fed from a 200 amp panel: Factors that Help Determine Electrical Load of an Electrical Panel.

Short Circuit Current Rating and Fault Level Current
The Correct Method to be used When Testing an Electrical Installation for Earth Loop Impedance: Accurately Measuring the Value of Zs at a Remote End of a Circuit.

UK 220 Volt Electrical System
UK Wiring System and Canadian Circuit Wiring Standards: I will be moving from the UK to Canada and want to bring with me some garage tools 220 volt.

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