110.16 Arc-Flash Hazard Warning​

110.16 Arc-Flash Hazard Warning

This section was first introduced in the 2002 version of the NEC.  Keep in mind that it was in 2002 that the new IEEE 1584 document was introduced and is that reference that we use to calculate incident energy.  

Related sections for reference:
240.67, 240.87

NEC 2002 Changes
This is the first time that 110-16 graced the pages of the National Electrical Code.  It began as a very generic label that had to be field applied raising awareness of the arc flash hazard..

NEC 2020 Changes
This session reviews some of the history regarding this section since the 2002 version of the NEC and helps you understand this requirement and why it is there. It’s all about the electrical worker.

Solutions related to these requirements

Arc Flash Relay

Arc Flash Switch

Shunt Trip Switch

An arc fault is the most devastating type of fault in medium voltage (MV) and low voltage (LV) switchgear. If an arc fault occurs, the EAFR system reduces arc energy by quickly clearing the current feeding the arc

The arc energy reduction switch leverages this relay to provide both arc reduction and ground-fault protection of equipment.

The 1200A and above switch that meets this requirement must be equipped with shunt trip capabilities.  Eaton’s solution brings the most cost effective solution to the table to meet this requirement.  

Arc Energy Reduction

This video provides a deep discussion of incident energy calculations and digs into both 240.87 and 240.67 to help you understand how to meet the requirements of these sections of the NEC.