NFPA says Hazard Analysis anything operationing at over 50 volts . That Means Mcc's, Switchgear, Panels 120/208
277/480 & up and up. I take it that includes Panels and Equipment over 50 volts Period. Example PLC 120 volt feed??
fire alarm Panel. 120/240 volt feed.
X ray Machine ect ect. Where is the Break Line and where in 70E does it say the break line is?? NEC 110.16 Spells out where ist sticker goes . 70E from what I see Doesn't where second one is required except Fer Hazard analysis. 2008 NEC adds Electrical Equipment to 110.16.look up equipment in definations in NEC umm this gets interesting??
Yoserup, 70E requires SHOCK protection above 50V, not arc flash protection, refer to the LAB< RAB, and PAB's listed in the tables for the voltage you are working on. 70E does not require labels, as someone else mentioned, the NEC does (Generic) but the 2008 70E will require labeling that includes the PPE required or the Ei from the analysis on everything the NEC does.
IEEE 1584 says an arc will not be self sustaining on systems less than 240V fed by a transformer less than 125kVA (However some testing group disagree with this), so that means you do an analysis above that point and use the 70E tables below that.
