[Elecraft] 240V Power Connectors

[Jim Brown]

Assuming you have 20A breakers and #12 or larger copper, you want NEMA 
6-20. See this link.

https://en.wikipedia.org/wiki/NEMA_connector

73, Jim

On Mon,7/11/2016 2:43 PM, Matt Murphy wrote:
> Jim --
>
> Ahh, I think that would work.  If the conduit works as ground (which I 
> think it does here) I could use the kind pictured in the link below, 
> and wire up a the power cable using the two hots and ground as you 
> recommend:
>
> http://waterheatertimer.org/images/240-Volt-outlet4-253.jpg
>
> 73,
> Matt NQ6N
>
>
> On Mon, Jul 11, 2016 at 4:21 PM, Jim Brown <jim at audiosystemsgroup.com 
> <mailto:jim at audiosystemsgroup.com>> wrote:
>
>     On Mon,7/11/2016 2:07 PM, Matt Murphy wrote:
>
>         I am guessing that installing a grounded 240V receptacle and
>         using the conduit as ground is *not* up to code.
>
>
>     It depends on the building code used by local jurisdiction. In
>     many jurisdictions, it IS legal to use conduit as the green wire
>     IF it is continuous and all the connections are made properly. As
>     I recall, it's legal in Chicago, where steel conduit is used for
>     almost everything, in large part to keep union electricians working.
>
>     In other jurisdictions, or if the conduit is not properly bonded
>     for the entire length, a dedicated green wire must be run.
>
>         If it were, then perhaps I could install a NEMA 6-30
>         receptacle (which has a ground pin and two hots).
>
>
>     I don't know connectors by number, but what I would install is a
>     standard outlet with two hots and ground that is slightly larger
>     than an ordinary 120V outlet.  Or even two outlets in the same
>     steel backbox, like a 120V duplex.
>
>     73, Jim K9YC
>
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