Electrode Configuration and 2018 IEEE 1584

The most frequently asked question that I receive regarding the 2018 edition of IEEE 1584 is:

“How do I determine the electrode configuration?” 

The 2002 edition was based on arc flash tests with the electrodes oriented in a vertical configuration. When performing an arc flash study based on the 2002 edition, there were only two options available – an arc flash in an enclosure and an arc flash in open air – both based on a vertical electrode configuration.

Since the original 2002 edition was published, additional research has shown that incident energy can be influenced by the electrode configuration.  As a result, many new tests were conducted using additional new electrode configurations including vertical electrodes that terminate into an insulating barrier as well as horizontal electrodes in an enclosure/box and in air.  This is in addition to the original vertical configurations in an enclosure and in air.  The additional configurations and the resulting Continue reading