Colin, Watts, watt hours which is closely rated to joules are important=20 but so is voltage and amperage rating. A thousand volt system has to be=20 very carefully set up or you are risking flash which is very dangerous=20 and destructive. Even a small amount of amperage at 1KV is a lot of=20 power. When I say small I mean in the one tenth to one half amp rage, A=20 very small amperage would be in the 10s of milliamps to one tenth amp,=20 extremely small currents would be in the nanoamp to milliamp range. Thanks, rich! P.S. I haven't read that article yet. I'm still setting my computer back up= .. Thanks, rich! On 6/27/2014 5:19 AM, cdb wrote: > On Fri, 27 Jun 2014 03:01:42 -0500, Richard R. Pope wrote: > :: I would like to see how they are doing 1000 volt PV > :: installations. Very dangerous. Lots of power there. Also goes the > :: same for 1.5KV systems but even more so > > I think we should probably be discussing this in terms of Joules or Watts > rather than voltage/currents. > > Electronic massage machines can have between 500 and 1kV outputs, but the > current is in the micro/nano amps, therefore it is not the voltage or > current per se but the combination and time/frequency exposed that is the > item of interest. Defibrillators outputs are also referenced in Joules. > > I think this is an extract from the paper I have somewhere at work - > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .