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Electrical Wire and Cable


What is the formula for the computations of main wire?

The electrical loads have much to do with the design of the main wire and main switch…..

 

Electrical Question from Jeremias about wire and main switch sizing
Background: Jeremias,  from Cebu,Philippines
Question: What is the formula for the computations of main wire and main switch?

Additional Comments: I guess it could brings me satisfaction

Dave’s Reply:
Maligayang Pagdating my Filipino Friend, Salamat Po – Thanks for your electrical question Jeremias. How is everything in Makati City these days?  Jeremias – what is the application? The electrical loads have much to do with the design of the main wire and main switch.

The Following links will assist you with your electrical question:

Basic Ohms Law Formula

Electrical Wire Sizes

For more information about 220 Volt Wiring Diagram
220 Volt Wiring Diagram

This link is helpful as a Other
Home Electrical Wiring Resources

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Home Electrical Safety

Be Careful and Be Safe – Never Work on Energized Circuits!

For Best Results Consult a Licensed Electrical Contractor.
Locate An Electrical Contractor in Your Area


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Includes:
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.





Be Careful and Be Safe - Never Work on Energized Circuits!
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Electrical Tips to Help You Wire it Right

The Safest Way to Test Electrical Devices and Identify Electric Wires!

The Non-Contact Electrical Tester
This 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 Tester
This 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 Cutter
My 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..

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