Re: [TCML] Consensus on HV cable

[David Sharpe <sparktron01@xxxxxxxxx>]

Jim

Excellent point!  We've had several employees get "surprised" (and PO'd)
when they touched a power cable we've DC highpot tested, and they forgot
to discharge cable prior to re-terminating.  A shielded cable of MV dimensions
can store sufficient energy (with enough distance) to be truly a lethal
surprise!

Regards

On Wed, Sep 15, 2010 at 10:24 AM, jimlux <jimlux@xxxxxxxxxxxxx> wrote:
> Phillip Slawinski wrote:
>>
>> Dave,
>>
>> I don't think you'll observe any ill effect by leaving the grounding
>> shield
>> intact.  Perhaps you could ground the shield at the coil, then the shield
>> acts to protect the leads to your transformer.  That's just a thought.
>>
>> -Phillip Slawinski
>>
>
> Basic principle of HV design.. don't leave conductive things floating.. Tie
> them to something so that when that something is grounded (e.g. when you
> shut down and are working on it), everything discharges.
>
> If you're leaving the shield on, then tie it to something... ground would be
> preferable, center conductor might be ok (if outer jacket is rated for the
> voltage, or it's supported appropriately).  At the least, you could tie it
> to ground through a big resistor.
>
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-- 
Dave Sharpe, TCBOR/HEAS
Chesterfield, VA USA

Sharpe's Axiom of Murphy's Law
"Physics trumps opinion!"
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