Re: [Elecraft] quick question about antennas

2016-07-11 Thread Bill Frantz 
When I wired an addition to our house some 40 or so years ago, 
one of my circuits from the service box started in Romex, 
converted to steel conduit, and then back to Romex. Since the 
grounding connections were properly bonded to each other, the 
building inspector in Los Gatos, CA approved it.


The principle reason for the grounding conductor (green wire) is 
to cause the circuit breaker to open if one of the hot wires 
shorts to the case of the electrical equipment. If the case just 
floated, it would be a shock hazard for anyone who touched it 
and also touched something that was grounded.


73 Bill AE6JV

On 7/11/16 at 2:21 PM, j...@audiosystemsgroup.com (Jim Brown) wrote:

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.

--
Bill Frantz| There are now so many exceptions to the
408-356-8506   | Fourth Amendment that it operates only by
www.pwpconsult.com | accident.  -  William Hugh Murray

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Re: [Elecraft] quick question about antennas

2016-07-11 Thread Mel Farrer via Elecraft 
The alternative on a standard duplex box is where the "blades" are at right 
angles to the normal outlet..  Therefore never allowing a misconnection.
Mel, K6KBE


  From: Jim Brown <j...@audiosystemsgroup.com>
 To: Reflector Elecraft <elecraft@mailman.qth.net> 
 Sent: Monday, July 11, 2016 2:21 PM
 Subject: Re: [Elecraft] quick question about antennas
   
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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Re: [Elecraft] quick question about antennas

2016-07-11 Thread Matt Murphy 
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 
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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> Elecraft mailing list
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> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to m...@nq6n.com
>
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Re: [Elecraft] quick question about antennas

2016-07-11 Thread Jim Brown 

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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