Codes & Standards

 

Essential to the work of the electrical contractor is knowledge of the National Electrical Code, the National Electrical Installation Standards and additional standards and codes administered by the National Fire Protection Association, the Occupational Safety and Health Administration and others. Here is a list of all our articles on codes and standards listed chronologically by issue date. 

Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Questions can be sent to codefaqs@gmail.com. Answers are based on the 2017 NEC.
 OCPD for a fire pump


Some regular National Electrical Code (NEC) users may not have noticed major changes in the 2014 and 2017 editions dealing with the emergency and standby power requirements in Article 700, Emergency Systems; Article 701, Legally Required Standby Systems; and Article 702, Optional Standby Systems.

As stated in 90.1(A) of the National Electrical Code (NEC), the purpose of the Code is the practical safeguarding of people and property from hazards arising from the use of electricity.

This article provides a review of more significant changes to the rules for special equipment covered in Chapter 6, Special Equipment, of the 2017 National Electrical Code (NEC).
 600.2 Definitions and 600.34 
PV Powered Signs


More on Codes & Standards

 
Disconnect The Neutral Too?

An electrical contractor recently requested information about the required emergency disconnects for a motor-fuel-dispensing facility.


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The NEC requires an effective ground-fault current path for medium- and high-voltage services.
Gone To Ground

Part X of Article 250 in the National Electrical Code (NEC) provides the grounding requirements for systems and circuits of greater than 1,000 volts (V).


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As Seen On Canadian TV

During a recent training program on the National Electrical Code (NEC), a question arose about panelboards and whether they could be installed in a horizontal orientation rather than vertically. This has come up often, probably due to various home-improvement broadcasts that are produced in Canada.


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Incident energy labeling requirements

Incident Energy Labeling, Handhole Enclosures And More

Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Questions can be sent to codefaqs@gmail.com. Answers are based on the 2014 NEC.
 Incident energy labeling requirements



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Fault Lines

The 2011 National Electrical Code (NEC) introduced changes that required ground-fault circuit interrupter (GFCI) protection to be readily accessible, and the 2014 NEC presents further changes regarding ready access of these devices. Were these changes necessary?


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Sizing Conductors, Part XXXVI

Rules for transformer secondary conductors are in Section 240.21 of the National Electrical Code (NEC). Many electricians and electrical engineers are familiar with 240.21 because it contains tap rules.


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