[time-nuts] Standards sought for immunity of shielded cable links to power-frequency ground loops

[Bruce Griffiths]

Poul-Henning Kamp wrote:
> In message <OF3277AC5A.F5D1FAE8-ON85257537.008059CF-85257537.00817C56 at mck.us.ra
> y.com>, Joseph M Gwinn writes:
>
>   
>>> That's technically speaking not triax, that's double shield.  Triax
>>> would have the conductors and one shield.
>>>       
>> No, I think that's twinax: <http://en.wikipedia.org/wiki/Twinax_cable>. 
>>
>> Triax is a center plus two concentric shields: 
>> <http://en.wikipedia.org/wiki/Triaxial_cable>.
>>     
>
> Sorry, I fumbled what I wrote there.  I would say wiki is wrong
> here, the usage I am used to is:
> 	coax: single conductor + shield
> 	twinax: twisted pair + shield
> 	triax: the wires + shield
>   

Poul-Henning

I have been unable to find a reference to triax consisting of 3
conductors within a shield, however such confusion is understandable
given the confusion over quadrax:-

concentric conductors for triax, quadrax, quintax etc:

Cable Shielding for Electromagnetic Compatibility By Anatoly Tsaliovich

http://www.lemo.com/techlibrary/glossary.jsp?catID=003


Alternate definitions for quadrax (but not triax):

http://www.picwire.com/technical/Coax%20vs%20Triax.pdf

http://www.ecnmag.com/ethernet-cable-suits-aerospace.aspx?menuid=336


Triax consisting of a central conductor surrounded by 2 concentric
conductors is widely used to interconnect televsion cameras.

Bruce