By definition, an electric arc is a visible plasma discharge between two electrodes that is caused by electrical current ionizing gasses in the air
wbd wrote:
That is the 3 phase voltage which is phase to phase to follow convention.
Varc < 15kV between two un-grounded conductors
wbd wrote:
This is a moot issue since it is answered above as it is 3 phase voltage and would fall into the More than 15 kV column in OSHA Appendix E Table 3.
25kV nominal voltage system with single phase to ground arcing ==> Varc < 15kV between un-grounded and grounded conductors
I understand the technical wording but my gut didn't feel the same.