Rated for 1400V from CENTER conductor to shield, not shield to the outside.
If you choose to use RG-58 with 250V on the shield then you will need to put
the entire cable inside conduit. It is not acceptable to have any type of
exposed mounting.
Bob
----- Original Message -----
From: "jimlux" <[email protected]>
To: "Discussion of precise time and frequency measurement"
<[email protected]>
Sent: Friday, June 18, 2010 10:23 AM
Subject: Re: [time-nuts] Galvanic decoupling of GPS antenna
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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