You will be taught safety is the first priority. All schools, in all the basic industrial electric courses, teach this important premise. Practical common sense safety steps are taught, along with not fearing but rather respecting electricity. For example, you will be taught how to correctly use a primary and a secondary voltmeter to determine if a circuit is live or dead.
You will also be taught how to correctly use test equipment. Some of the equipment includes voltmeters, ampmeters, and multimeters. A multimeter has a voltmeter, an ampmeter, and a resistance meter in the same case. You will also be taught how safety is interrelated with testing equipment. For example, in the ELEI 112 beginners class at Baltimore County Community College, you will be taught how to correctly use equipment to test circuitry.
As an electrician, you will be required to read schematics proficiently. A schematic is an electrical blueprint. You will rely on the schematic when wiring or debugging a circuit. For example, an entire assembly line may be shut down due to an electrical problem, so repair time is critical because a shut down line costs the company money. You will find and fix the problem using a schematic.
You cannot understand electricity without understanding the theory behind it. As part of introductory industrial electrical courses, the theory behind electricity is taught. You will understand electrical design, and why things happen the way they do. Part of the theory includes learning Ohm's Law, and how volts, amps, resistance, and wattage are interconnected. Along with theory, common electrical math is taught. For example, you will learn that volts multiplied by amps equals watts.