I just purchased this book by Micheal Boxwell online and have found it very usefull
it is online linked and on the web page there are dozens of questions that the Author answers
plenty of calculators,wiring schematics and general guides to cost and what you may need for different types of system .
Roy
it is online linked and on the web page there are dozens of questions that the Author answers
plenty of calculators,wiring schematics and general guides to cost and what you may need for different types of system .
Roy