LVD - EN61010-1 reason for 45 uC Limit?

[Jon Bertrand]

     
     
     Hello Everyone,
     
     Does anyone know why there is a charge limit on hazardous voltages (up 
     to 15kV) and not an energy limit?  (I'm referring to EN61010-1 but I'd 
     guess it's the same in EN60950).
     
     Charge seems like a strange thing to limit.
     
     I would think you would want to limit energy.  
     
     Can't you do more "work" with 45uC at 14.9kV ( = 4995 Joules) then you 
     can with 45 uC at 100 V ( = 0.225 Joules)?  More work means more 
     burns, more fire, more harm.
     
     And why 45uC?
     
     
     Anybody know?
     
     
     Thanks,
     
     
     Jon Bertrand
     j...@cirris.com