Arc Flash Evaluation for Single Phase Equipment
Arc Flash Evaluation for Single Phase Equipment
(OP)
I was wondering what people are doing as part of arc flash evaluations when you have both 3-phase and single-phase equipment (panels, etc.) My experience is that some arc flash software ignores single phase equipment and that it is somewhat ignored in NFPA-70E. It seems silly to have a HRC/PPE specific label on a 3-phase panel and have a single-phase panel right next to it with no label. Any thoughts?






RE: Arc Flash Evaluation for Single Phase Equipment
RE: Arc Flash Evaluation for Single Phase Equipment
RE: Arc Flash Evaluation for Single Phase Equipment
The standard allows you to ignore xfmr's below 125kVA (480-208/120V systems).
Mike
RE: Arc Flash Evaluation for Single Phase Equipment
RE: Arc Flash Evaluation for Single Phase Equipment
They have arcflash shareware ("Duke Power Heat Flux Calculator") that allows for 120VAC calculations.
David Baird
Sr Controls Designer
EET degree.
Journeyman Electrician.
RE: Arc Flash Evaluation for Single Phase Equipment
IEEE-1584 recommends that ALL 240V systems be evaluated. For 208V systems, they recommend evaluation for systems 125 kvA and larger. 240V and 208V are treated differently.