The grounding wire conducts current in the event of a ground fault and helps reduce the chance of severe. Introduction to electrical theory description working as an electrician requires many skills.
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Basic electrical wiring theory pdf. Looking at the node connection between two loops in the diagram below we already know that to be true. Voltage always follows the path of least resistance it takes less than 1 amp of current to stop your heart. Basic mathematical skills are used everyday by construction electricians. Understand the theory of electricity. The complete guide to electrical wiring current with 20142017 electrical codes by blackdecker. The physical demands of the job are one important part of the skills needed to succeed.
In other words the net current in a node is zero or 0 iin iout. Electricity makes no sound doesnt have an odour and cant be seen. Electrical theory and application voltspdf 31504 rev12 page 2 2004 ll kiln mfg inc. Determine voltage amperage and resistance. Turning off the breakers in the control panel only. Understand the components of electricity and matter.
Basic electrical theory troubleshooting. A sound understanding of these basics prepares you for the more complex math skills youre likely to use on construction projects ranging from whole numbers fractions decimals ratios proportions percentages and square roots to measurements and calculations using geometric shapes. Chapter 10 alternating current theory and electrical machines 193 chapter 11 polyphase or three phase electrical systems 221 chapter 12 overcurrent short circuit and earth fault protection 233 unit 4 installation buildings and structures 259 chapter 13 statutory regulations and codes of practice 261 chapter 14 electrical installations and wiring systems 279 contents v. This law basically states that current into a node will equal the current out of the node. Hot wires are black or red and neutral wires are white or light gray. Reading and communication skills are other aspects one must develop and improve to be a successful worker in the electrical field.
Understand the theory of magnetism. Identify the elements involved in electrical current flow. Construction electrician your understanding and knowledge of basic electrical theory will able to conduct the navys mission. These wires are color coded for easy identification. Technical learning college ceu training for water wastewater. Module 2 basic.
The following is a brief description of the information presented in each module of the handbook. Answers to check your understanding 367 appendix a. Identify the material and devices in use in electrical current flow. Identify the types of electrical circuits used in vehicles. The electrical science handbook consists of fifteen modules that are contained in four volumes. 0 2923ma 1163ma 176ma.
Abbreviations symbols and codes 371 appendix b. Electricity can kill you. For safety all modern circuits include a bare copper or green insulated grounding wire. There are three basic. Safetyis the most important thing. Understand the principles of electromagnetism and electromagnetic induction.
Electrical theory is a basic building block that every potential electrician must understand from the start. This current varying in parallel circuits brought about kirchoffs next big law in basic electrical engineering kirchoffs current law kcl. Current enters a circuit loop on hot wires and returns along neutral wires. Volume 1 of 4 module 1 basic electrical theory this module describes basic electrical concepts and introduces electrical terminology. Always turn off power when working inside a control panel or on any other electrical device turn off the service breaker feeding the control panel or electrical device usually located outside of the control panel.
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