All,

600 V is standard in Canada.

--
Doug Nix
d...@mac.com
http://www.dougnix.net


If you pick up a starving dog and make him prosperous, he will not bite you; 
that is the principal difference between a dog and a man. - Mark Twain 

> On 21-Sep-16, at 15:52, Richard Nute <ri...@ieee.org> wrote:
> 
>  
> I would seriously consider pointing out to your customer that their specified 
> supply voltage is not a common one
>  
> I suspect your customer already knows this.  The issue is determining that 
> the product is safe, given that the mains ratings exceed those in many safety 
> standards.  While standards such as 60950 state that they are applicable to 
> 600 V rms (there is a statement in the standard that unless otherwise noted, 
> all voltages are rms), as has been mentioned, the clearance, creepage, and 
> electric strength requirements go well beyond 600 V.  
>  
> Clearance and electric strength requirements are based on transient 
> overvoltages.  Transient overvoltages come from lightning strikes and 
> switching.  DC mains may not be outside the local building so may not be 
> subject to either or both of these sources of overvoltages, so the clearances 
> and electric strength requirements may not be applicable to this equipment.  
> I believe 62368 so states.
>  
> Rich
>  
>  
>  
> -
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