Whether you’re looking to get into a career as an electrician or to do electrical work at home it starts with the basics and that is what this book intends is to give; a basic understanding of electricity. One convenience which every citizen in every country so depends on not only just to have a comfortable home, but to keep foods fresh, cook meals, run toys and entertainment systems and even to dispose of garbage in some locales. Farms use it to keep stock within their pastures, it is used even to produce the milk. I’m speaking of course of electricity we see the transmission lines at the curb and sometimes we can hear the buzz of a transformer. Electricity is that invisible force that does so much for the comfort, and convenience of mankind. A certain kind of electricity is almost always with us we have a kind of electricity in our own bodies, and static electricity of which I’m certain every one has experienced the effects of it once in a while. Our vehicles use direct current and have a battery to store power which is generated by an alternator. The alternator actually produces the same kind of current we have in our homes but is converted or transformed down to direct current (DC). When a manufacture wires a vehicle it is very much like a home appliance the appliance must have a positive and a negative charge to operate a light. Electrical circuits in buildings are set up so that the positive always returns to ground, or the neutral branch in the circuit panel or breaker box one could say. But electricity isn’t particular about how it returns to ground if a person comes into contact with that positive line he becomes the ground and unfortunately many people become just that when they are careless and they die from electrocution. Switches solenoids or relays are used to turn power on and off in vehicles and in our homes and places of business. That said a little later in this book I’ll show a digital electrical test meter and the kinds of electrical wire in our home. The proper tools and the way to strip the insulation and covers from house wire. Receptacles which are installed in our homes and how to install a room receptacle and the difference in the plug-in slots and why it is important to always install the wiring properly. I wrote troubleshoot hvac like a pro and in order to diagnose hvac one must also know how to diagnose electrical problems because air conditioning work is in fact about ninety percent electrical.
