Re: Definitions of High Voltage

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "David Sharpe by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>

Hi Dan

According to National Electic Code (NEC-US), low voltage
controls (low/no shock hazard)  is 30V rms or 42V pk.  This
is also new VDC bus voltage for 2003 and up automobiles.

Low voltage (mains power) is considered 600V or less.

600V to 15kV is considered medium voltage, with 5kV (2300/4160),
and 15kV (8600/13200) class equipment pretty common; 7-8kV
(6900-7200) less so; at least in this area of US.  I've heard that
6.9kV is pretty common in mining operations.

Anything over 15kV is considered HV, where EHV crossover is
(IMO) somewhere in the 300-500kV (L-L) range and up...

Regards
Dave Sharpe, TCBOR
Chesterfield, VA USA

Tesla list wrote:

> Original poster: "Mccauley, Daniel H by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>
>
> Its funny how relative the definitions of high voltage are:
>
> 1.  In our digital lab here at work, high voltage is anything over 30V
>
> 2.  In our transmitter lab, we consider anything over 400V to be high
> voltage
>
> 3.  Our linesman here say anything that is over 69kV is considered high
> voltage
>
> Dan