Electrical theory courses are the bulk of an electrician's classroom education. Electrical theory courses cover topics such as circuits, current, alternating current, direct current, resistance and voltage. Voltage classes are typically separated into high voltage and low voltage. Low-voltage classes cover the specifics of installing and repairing low voltage systems and using low-voltage equipment. The equipment used for low and high voltage is different so it is important each topic is covered separately and thoroughly.
Before installing any type of wiring, electricians draw up a blueprint of the system or circuit. Electrician apprentices learn how to draw these schematics which require knowledge of the different types of tools and materials available as well as the symbols used to draw the schematics. Planning out a large project is the first step to ensure success so blueprint skills are important.
All cities have codes that must be met when completing construction work on a building. Electrician apprentices learn the codes to make sure they are in compliance. An inspection to make sure the work is up to code may be done. Failure to meet code leads to fines and extra money if work is redone.
Electrician apprentices learn about safety codes as well as precautions taken on the job. Most electricians wear safety gear such as special gloves, construction hats because there is typically construction going on around them and safety goggles to shield against sparks. Electricians learn where and how to turn off the electricity before beginning work, how to test live wires, how to deal with an electrical fire and first aid procedures in case someone gets hurt.
Because electricians routinely work on buildings as they are constructed, they must have knowledge of construction materials, techniques and process. Electricians need to know where to place wiring in anticipation of what is being built. Electricians routinely cut holes for wires to run through and to do so must operate drills and other construction tools.