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Re: [Amps] RG-213 Hi pot ?

To: Joe <>,
Subject: Re: [Amps] RG-213 Hi pot ?
From: Steve <>
Date: Mon, 13 May 2019 15:10:33 +0100
List-post: <>
Indeed, other brands give the same number. I wonder if they all measure exactly the same result?

If you search for voltage breakdown figures for the polyethelyene dielectric you'll find numbers from 18kV/mm (450V/mil) going upwards. RG213 has dielectric 2.5mm/100mil thick.

OK, these are numbers for large flat surfaces at sea level with no humidity etc., and coax has an inner with curvature (although far short of a sharp point) but even so I think there's a lot of headroom above a 5kV figure.


On 13/05/2019 14:10, Joe wrote:

I was curious on this also, so Googled it and Pasternack has a datasheet for RG-213U
and it says it is only 5K

Max. Operating Voltage(VRMS): 5000


On 5/12/2019 12:13 PM, Steve Thompson wrote:
I think 213 will take that easily. It was a while ago, but I'm sure that I couldn't detect any leakage on 213 with my tester maxed out at 16kV. A local 'maker' group used it to repair a 35kV lead on a laser cutter. As far as I know it's working ok.

Good quality RG58 should take 8kV without any problems - again, I've had it at the limit of my tester. I suspect the cable working voltage specs are often derived from connector limitations.


Does anybody know how much max V is on RG-213 ?   Like what are the results if a hi-pot tester used.. and say cranked up to the point where  just a few microamps occurs .     I have an application where I need a  HV cable, less than 10 ft, that will  easily handle 5700 /  7700 vdc. It will be hardwired at both ends, no HV connectors. And with braid peeled way back from the center conductor, like  2-4 inches .  The plan was to also wrap some red electrical tape every few inches along its  entire  length, to readily identify it as a HV cable.

Tnx....  JIm   VE7RF

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