You are committed to doing quality work and solving problems in the field carefully and thoughtfully. But you know that taking your electrical license exam will be a very different experience from working in the field.
On average, these exams are 100 questions in length. If you are given 4 hours to complete the exam, you have approximately 2.4 minutes to answer each question.
Can you answer the following question in 2.4 minutes? 
Question:
What is the full load current in the common conductor of a 5 hp. 230 volt, two-phase three wire motor?
Solution:
13.6 amps x 1.41 = 18.6 amps
In this instance using the table of contents in NFPA 70 can prove helpful. There you’ll find that Article 430 Motors is divided into sections. Section XIV is the table section. Upon turning there you will see that Table 430-149 provides full load current values for two-phase, 4 wire motors. Apply the multiplier rules above the table for determining the current in the common conductor if the motor has three wires instead of four.
Understanding when to use the table of contents verses the index was key to being able to answer this question in 2.4 minutes. Always use the method that will get you to the answer in the shortest possible time.
Remember when taking the electrical license exam, timing really is everything! Prepare for success. Click on the “Register Now” tab or call 888-919-3926 today.