Free Electrical Books

[Kathrine Selvage]

Abook contains all the drawings that make up an electrical project. A book can contain folders, drawings, and all associated documents. You can have multiple books in an electrical project if required.

By default, a book is associated with a location and a function. All items (drawings and components) dependent on this book are automatically associated with this location and this function by default.

User data are present across the entire electrical project. They are used to store personal information, which can be displayed in the drawings. There are two types of user data: translatable user data (translated during electrical project translation), and non-translatable user data.

To become a certified electrician, master electrician, electrical administrator, or telecommunications administrator you must pass the appropriate Washington state examination related to the work you will be doing.

Electrical exams are administered by PSI, with testing locations available across the United States. For information on preparing for the exam, what to expect when taking the exam, testing locations in Washington, and exam content, download the PSI Exam Bulletin.

There are several categories of electrical work (for example, general, residential, telecommunications). A separate exam is offered for each certification. The specific sections for your certification must be scheduled for the same day.

Applicants with disabilities or those who would otherwise have difficulty taking the examination can contact us to request a reasonable accommodation. You will need to submit proof from a physician or specialist to document your specific needs. Special accommodation requirements can be found in Chapter 296-46B-960(4) WAC.

To request an accommodation, email Electric...@Lni.wa.gov or call 360-902-5249. Do not schedule your examination with PSI until you have received a determination on your request.

Copyrighted materials can only have highlighting, underlining, and/or permanent index tabs. The exam proctor will check all books for handwritten notes, removable tabs and blank paper. Any materials found with unacceptable notations are not allowed into the exam and may be confiscated. Handwritten notes and markings in books are considered an attempt to cheat on an examination.

To challenge the results of an exam, first review the results provided by PSI. The score reports provide a list of code articles that indicate the areas of the exam where you answered questions incorrectly.

Basic classroom courses are intended for electrical trainees. These courses meet a trainee's educational requirements both for renewal of their certificate and for electrical examination approval. Trainees must take 48 hours of basic classroom instruction every two years to renew their certificate. These hours may be included as part of a registered apprenticeship or electrical training program, or they can be taken separately. As their names suggest, these courses must be taught in a classroom-based environment. Electricians, administrators, and master electricians who take basic classroom instruction courses can only receive credit for these courses as industry related instruction.

If you are unsure what continuing education has been reported, or the status of your certificate, check your record in L&I's verify a contractor or tradesperson tool to see what courses have been reported and may be considered for renewal will be listed.

For course schedules, contact the course sponsor named in the lists below. Courses are good for 3 years from the date of approval. Before selecting a course, verify the course will not expire before you complete it. See the list of approved courses:

If you are coming from a state that has electrician licensing requirements equivalent to Washington. We will require a notarized letter from the Electrical Board from that state attesting to your status and qualifications.

Public community or technical colleges or not-for-profit nationally accredited trade or technical school: a notarized transcript from the office of the registrar listing the course names, hours, and credits of in-class NEC or electrical theory training completed by the applicant.

If you have experience in the armed forces of the United States that matches something described in Chapter 296-46B-920 WAC, it may count toward the hours of experience you need to qualify for an electrician exam.

Nuclear, marine, shipyard, shipboard, radar, weapons, aeronautical experience, or similar experience may count for up to 50 percent of the experience required to qualify for an exam.

There are no fees required to evaluate military experience.

Electrical injuries are a complex form of trauma that is often associated with high morbidity and mortality. The severity of the injuries depends upon the type of current, the voltage, and the resistance. This activity will review the pathophysiology behind electrical burns and explain the role of the interprofessional team as they evaluate and treat these complex patients.

Objectives:Explain the difference between alternating and direct current and the different injury patterns seen with both.Identify the potential immediate and long term complications associated with electrical injuries.Outline the treatment of patients presenting with electrical injuries.Summarize the importance of using an interprofessional team, system-based critical care approach in managing patients with electrical injuries.Access free multiple choice questions on this topic.

Electrical injuries, a relatively common form of mechanical trauma, can occur as a result of lightning, low-voltage, or high-voltage injury, and are often associated with high morbidity and mortality. Almost all electrical injuries are accidental and often, preventable. If not instantly fatal, the damage associated with electrical injuries can result in the dysfunction of multiple tissues or organs.[1][2][3][4]

An individual may experience an electrical injury at home such as shock from a small appliance, extension cord, or wall outlet, which is very rarely associated with any significant trauma or complications. Children may experience a low-voltage injury without associated loss of consciousness or arrest by biting or chewing on an electrical cord. Adults may receive similar injuries while working on home or office appliances or circuits. Low-voltage electrical current can result in severe injury, much like high-voltage current, depending on the length of exposure (e.g., if there is prolonged muscle tetany), the size of the individual, and cross-sectional area in contact with the electrical source.[5][6][7][8]

In the United States, there are approximately 1000 deaths per year, as a result of electrical injuries. Of these, approximately 400 are due to high-voltage electrical injuries, and lightning causes 50 to 300.

In adults, these injuries occur mostly in occupational settings and are the fourth-leading cause of workplace-related traumatic death, whereas, in children, electrical injuries occur most often at home.

The flow of electrons through a conductive material, down a potential gradient from high to low concentration, generates electricity. The potential gradient, or the difference between the high and low concentration of electrons, represents the voltage and may vary depending on the electrical source. Electrical injuries can be separated based on low-voltage or high-voltage injuries, where a threshold of either 500 V to 100 V may be used. This is considered high. Household electricity in the United States is set at 110 V, though some high-power appliances may be set as high as 240 V. In comparison, industrial and high-tension electrical power lines can be set at greater than 100,000 V.

Resistance (R) is a measure of how a material reduces the amount of electrical flow that passes through it, measured in ohms. In the body, the resistance varies between tissues, depending on the level of water and electrolytes that are present. The highest concentration of electrolytes and water (and therefore the lowest resistance) are found in blood vessels, neurons, and muscles. For this reason, these are excellent conductors of electricity in the body. Bone, fat, and skin are, contrastingly, poor conductors of electricity (with high resistance). Skin resistance also increases with increased thickness, dryness, and keratinization. Moist mucous membranes or openings in the skin (e.g., punctures, lacerations, or abrasions) contrastingly have a lower resistance.

Tissues with the highest resistance tend to suffer the greatest level of damage as a result of an electrical injury. High skin resistance will cause a larger amount of energy dissipation at the level of the skin resulting in skin burns, thereby reducing the level of resultant internal damage. On the other hand, low skin resistance may result in less obvious skin injury or no skin injury at all, while a larger amount of electrical energy is transferred to internal tissues. For this reason, the extent of external burns on the skin does not predict the level of damage that will be found internally, nor does the total absence of external burns predict the total absence of internal electrical injury.

The resistance of internal tissues themselves further determines the level of damage that is encountered. An additional factor to consider is the current density which is determined by the cross-sectional area of a particular tissue. For example, as electrical energy travels down an arm which is mainly composed of low-resistance tissues like muscle, nerve, blood vessels, the current density is relatively low and constant throughout. This is true until the electrical energy reaches the joints (e.g., elbow, wrist, fingers) where a larger proportion of the cross-sectional area is comprised of tissues with higher resistance (e.g., bones, tendons) and fewer low-resistance tissues. Therefore, at the joints, the electrical energy becomes more focused on fewer low-resistance tissues, and for this reason, these types of tissues tend to suffer the most injury at the joints throughout the body.

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