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How to Estimate Large Commercial Electrical Jobs

I am looking for a book on estimating large commercial jobs including Solar installations. Their are so many books out there which are the best…

Resources for Estimating Commercial Electrical Jobs
Question: I am looking for a book on estimating large commercial jobs including Solar installations. Their are so many books out there which are the best?

This electrical question came from: Jason, a Electrician from Middlesex, New Jersey.
See more about Home Wiring for New Jersey

Dave’s Reply:
Thanks for your electrical question Jason.
Electrical Estimating for Commercial and Solar Projects
Jason, there are a lot of fine resources for great electrical books. One publisher that I am very familiar with is Thompson Delmar, theĀ  Cengage Learning publishers who produce high quality books. I personally have their De Walt Electrical Estimating Professional Reference and the De Walt Construction Estimating Complete Handbook.

The Following links will assist you with your electrical question:

Home Electrical Wiring Codes
electrical-wiring

Electrical Code Articles for Home Wiring

Electrical Code Directory covering afci circuit, electrical-boxes, electrical-circuit, electrical-code-outlets, electrical gfci, electrical-grounding, electrical-project, electrical-services, electrical-underground, electrical-wiring, electrical-wiring-code, lighting-code, and smoke-detectors.

You identified your project to be about Electrical Wiring, so you might find this information useful:

Electrical Wiring
Electrical Wiring

Electrical Wiring

Home electrical wiring projects with pictures and wiring diagrams.


» You Can Avoid Costly Mistakes! «

Here's How to Do It:
Wire It Right with the help of my Illustrated Wiring Book

Great for any Home Wiring Project.


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Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
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!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

Question of the Day

Wiring a Switch for an Air Compressor

Wayne asks:
I am wiring my 240volt air compressor using 10/3 to a lighted 30 amp switch to place by exit door to turn off when im away.
My question is: when I wire the switch I will have essentially two hots, do I place both the black and red on one screw and the black and red on the other?
Also its the lighted Leviton 3032-plr, a lot of the comments say I need to use the neutral to operate the light.
I dont know what to do with that.
Thanks for your help.

Dave's Reply:


Wayne, The Leviton 3032-plr switch that you have described is for 120volt applications and will not work on a 240volt circuit.
A typical 240 volt air compressor requires two hots and a ground wire.
A neutral wire is not required.
A 120volt lighted control switch could be wired as an add on control circuit, however this would require a separate 120volt control circuit, a 120volt lighted switch, and a 120volt control relay with 240volt contacts rated for 30amps.


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