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General nec nfpa 70 code trivia. Giving the electrician an upper edge. Focusing on little known exceptions or obscure code. 
This is the second part in preparation for the Master journeymans test also known as the Supervisors test. 
Source: Data Center Handbook / edited by Hwaiyu Geng. Copyright © 2015 by John WileY & Sons, Inc. All rights reserved 
This is DC theory in preparation for the supervisor or master electricians licensing test. Electrical Exam Preparation based on the 2014 NEC, Mike Holts 
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