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Formulas to study for the electrical test

The formulas to study for the electrical test range from common knowledge (those you use on the field) to complicated.  Let’s go over the commonly needed formulas that you will need to use for the PSI electrical test.

Includes motor calculation steps, box fill, ranges, transformers, conduit fill, PIE, EIR, and more!




If your testing center allows short notes in the code book, write these formulas down. This way you don’t have to try to remember them during the test.


Check your test provider’s website to see if they allow short notes in the book.
For those who are not allowed to have written notes in the book, make yourself some flash cards and memorize these formulas.



Formulas to Study for the Electrical Exam


PEMDAS


Even though PEMDAS is not an electrical formula, you must remember your order of operations. Don’t go through the trouble for learning these formulas just to do the math in the wrong order!


So, Please Excuse My Dear Aunt Sally to get the correct answers.
Or perhaps, “Please Excuse My Drunk Aunt Sally”. Whatever works for your, just get this down.
  • Parenthesis
  • Exponents
  • Multiply or
  • Divide 
  • Add or 
  • Subtract 

*Multiple/Divide will be from left to right whichever comes first
*Add/Subtract will be from left to right whichever comes first
*After multiplication and division has been completed, add or subtract in order from left to right. The order of addition and subtraction is also determined by which one comes first when reading from left to right.



Best of Luck! And don’t forget, to download your Electrical Formulas Cheat Sheet right now.


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Location: Texas, USA

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