NEC / IEEE Votlage classification definition

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cornbread

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I did a search on this esteemed thread and seen where there have been past discussions on the definition low, med and high voltage. Seems the debate / replies varied depending if you looked at NEC or IEEE. Is that still the case where the NEC has one definition and IEEE another?
 
cornbread said:
I did a search on this esteemed thread and seen where there have been past discussions on the definition low, med and high voltage. Seems the debate / replies varied depending if you looked at NEC or IEEE. Is that still the case where the NEC has one definition and IEEE another?
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I believe the NEC just references 600V as the line between LV and HV, don't think there is much else in there (The NEC gurus would know better than I).

IEEE is where it gets confusing, there are a few different types of voltages referenced in different standards. But "utilization" voltage is what is most commonly refered to.

Off the top of my head they are (Don;t have my color books with me today)
LV=<1000V
MV=1001V-69kV
HV=69,001V-230kV
EHV=230,001-800kV
UHV=>800kV
 
Per ANSI C84.1:
LV: <=1kV
MV: >1kV and <100kV
HV: >=100kV and <230kV
EHV: >230kV and <1MV
UHV: >=1MV
 
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