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Electrical and electronics installers and repairers
Description: These workers install and repair equipment in factories. About one-third of them work for the federal government, many for the Department of Defense. They install radar, missile controls, and communication systems on ships, on aircraft, on tanks, and in buildings. Other electronic equipment repairers work for telephone companies, at hospitals, and in repair shops.
Source: Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, 2008-09 Edition at http://www.bls.gov/OCO/
Salary: $50,001 or more per year

I am an electrician and foreman for the largest electrical contractor in Northern Ohio, and do commercial and industrial work. We use a lot of geometry and math for conduit bending. We also use a lot for figuring out transformer kva, amperage, current draws, how much a wire can carry when bundled with many other wires in a conduit (heat buildup reduces capacity), etc. Basically, if you aren't good at math, don't waste your time trying to get into this industry, as you will not get too far. - gimemoore2@alltel.net (K. Moore)

There are 25 math topics Electrical and electronics installers and repairers need to know.
Basic Math / Algebra
Ratio and Proportion
Customary Measurement
Metric Measurement
Measurement Conversion
First-Year Algebra
Using Formulas
Linear Equations
Basic Terminology
Angle Measurement
Congruent Triangles
Triangle Inequalities
Parallel Lines
Pythagorean Theorem
Right Triangle Trigonometry
Make/Use 3D Drawings
Other Topics
Basic Calculator Use
Scientific Calculator Use
Computer Use
Mental Math