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» Residential Home Wiring Diagrams
» Residential Electrical Wiring: Guide to Home Wiring
» Need Electrical Help? Get a Quick Reply! Ask the Electrician
Ohms Law Formula
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By Dave Rongey
Summary: Ohms Law Formula and how it is used for determining electrical loads as it pertains to Watts, Volts and Amps. Ohms Law is very helpful to help us understand sizing electrical circuits for the home electrical system. |
Basic Ohms Law Formula for Electrical Wiring Calculations
The Ohm's Law Calculations for Electrical
Using the Ohm's Law is a way to determine information needed to understand how to design electrical circuits.
This formula works with three main variables and depending on what is known can produce a missing factor which is needed to determine the circuit size.
The Ohm's Law is also used when designing appliances and building electrical equipment and devices.
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Example: A Microwave Oven circuit |
| Device ________________ Volts _________________ Amps ________________ Quantity ______________ Circuit Size Amps ______ Wire Size ____________ See the Wire Size Chart |
Understanding Electrical Equipment and Appliance Labels |
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Electrical Calculations and Formulas |
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Converting Watts to Kilowatt/hoursQuestion: Can you tell me how to convert watts to kilowatt/hours? Dave's Answer: Kilowatts represents 1000 watts, so 6000 watts is the same as 6 kw. Based on this, if 6000 watts of power were consumed for one hour then that would be 6000 watts per hour. A watt hour meter measures how many watts of power are consumed per hour. Electrical utility bills often include the peak demand period, which is the highest amount of electricity that is consumed in one hour. If this high demand of electricity is during the peak demand period of the day then this may have an effect on the electrical utility bill causing it to be more expensive. If a high amount of electricity is consumed during non-peak demand periods during the day then the electrical billing may not be as costly. |
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The Safest Way to Test Electrical Devices and Identify Electric Wires!The Non-Contact Electrical TesterThis is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.
The Quickest Way to Check for Faulty Electrical Wiring!The Plug-In Outlet TesterThis is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring. It detects probable improper wiring conditions in standard 110-125 VAC outlets Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency Lights indicate if wiring is correct and indicator light chart is included Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect Very handy and easy to use.
Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!The Wire Stripper and Wire CutterMy absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires. This handy tool has multiple uses: The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation. The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets.. The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use. |
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