[time-nuts] Galvanic decoupling of GPS antenna

jimlux jimlux at earthlink.net
Fri Jun 18 10:23:57 EDT 2010


Robert Benward wrote:
> I don't think the shield is rated for +/-250V, and I'm not sure I would 
> want to handle RG-58 with 250V on the shield.    If you do this, use 
> triax cable and ground the outter shield, and make sure the breaker can 
> interrupt the fault current (if the fault currrent is in the hundreds, 
> or even tens of Amps then this would not be a good idea).
> 
> Bob
>

Sure it is.. It's almost certainly rated to 300V (most all wire is), and 
probably higher.  Recalling that RG-58 doesn't really describe a 
specific kind of cable or construction (especially these days.. what you 
get is "RG-58 type")

But looking at the data sheet for Belden 9310 (the first RG-58 that 
popped up on Belden's website), I see a max operating voltage of 1400V 
(and the 50V rating as well.. for UL uses, but that's a sort of bogus 
number, designed to fit in a particular regulatory category.. kind of 
like ICs with TID limits of 300kRad, the limit for non-export controlled 
datasheets)





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