Using Electrical Exam Question Key Words Means Passing Your Exam

October 18, 2021
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To effectively use key words in exam questions to locate code reference answers you need to be able to quickly identify the key words in the question. Can you identify the key words in the following question with ease?

Question:

How many 20 ampere branch circuits are required to supply 500 feet of fixed multioutlet assembly where appliances are not likely to be used simultaneously?

Solution:
8 circuits.
Refer to the index of NFPA 70, locate keyword: “Multi-outlet assembly, calculation of load.” The article that is references in the index is Article 220.14(H).which indicates: ”Where appliances are unlikely to be used simultaneously, each 1.5 m (5 ft.) or fraction thereof of each separate and continuous length shall be considered as one outlet of not less than 180 volt-amperes.”
To apply this code correctly you’d need to focus on the fact that the appliances are not likely to be used simultaneously.

# of Outlets = 500 ft. fixed multi assembly/5 ft. per outlet = 100 outlets

Since the number of outlets required is 100, the standard rating for an outlet is 180 va and the volt-amp capacity per circuit is 2400 va, 8 circuits would be required.

Knowing whether the fixed multi-outlet assembly would be supplying a large number of loads simultaneously, where to locate the standard volt-amp rating for an outlet in the code and how to calculate the circuit capacity is key to arriving at the correct answer.

Learning how to Identify the key words in questions on your electrical exam will prepare you to translate what you’ve learned in the field into a passing score on your exam. We’re ready to help you reach this most important of career goals. Click the register now tab or call 888-919-3926 and start preparing to pass your exam today.

 

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