Newsgroups: rec.arts.theatre.stagecraft
Subject: Re: Event Space question 40A Three Phase
References: <[email protected]> <[email protected]> 
Richard Dreyfuss  writes:

>  wrote in news:[email protected]:
> 
> > 40 amp is an odd size for here.  Most plugs/receptacles for
> > 240V-3phase (grounding) are either 30amp or 50 amp.  For 30 amp you
> > are probably looking for something like an NEMA L-15-30.  Over 30
> > amp, the plugs/receptacles are non NEMA but something like Leveton's
> > CS63-69 might be what you are looking for.  Both are "California
> > style" twist lock 
> > 
> > Peter
> 
> Out of curiousity,  what's a "California style" style twist lock versus 
> other kinds?  I haven't heard that term before.
> 
> And I'm nowhere near California, unfortunately.  

I am neither. 

I was curious what was that, and did quick Google search. 
It looks like the "California style" twist lock is 
a connector that is like normal twist lock with added 
ground connection on the outside of the connector.. 

On the female connector side, there is metal ground contact 
on the outside of the connector. That grounding strap is 
to provide a low-resistance ground path. 

On the male plug there is a metal plug shroud with a 
rigid vinyl protective shell surrounding the pins. 
This metal plug shroud makes contact with the 
male grounding strap when plug is inserted. 


Some pictures of "California style" connectors:
http://www.aplussupply.com/ps/twist/crcs.htm
http://www.passandseymour.com/products/product.html?c=CR6361
http://www.passandseymour.com/products/product.html?c=CR6370
http://www.passandseymour.com/pdf/H25.pdf

For comparision "normal" twist-lock
http://www.bell-electrical.com/HBL7567C_Bell_Electrical.html

-- 
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at 
http://www.epanorama.net/