[GreenKeys] TTY Patch panels

[John, W9DDD]

Hi Bruce,

I know of no special measures to avoid being bitten other than plug in 
the load (set) side first.  But the listed rationale for that is to 
avoid opening the line side and interrupting something else on the circuit.

Common sense seems to be a lost art.

I seem to recall that the screw you're talking about was somewhat 
recessed when properly installed.  I don't recall having been bit by 
one.  Others may have had a different experience.

John, W9DDD

On 8/11/2020 12:19 PM, Bruce Gentry via GreenKeys wrote:
> As I am getting a TTY setup together, with several different ASRs, KSRs, 
> TDs and reperfs.  I want to have maximum flexibility in 
> interconnections, which means a patch bay is probably the best way. 
> However, how was safety addressed with them? I have a military surplus 
> RTTY hut that uses a standard patch bay, each device  going to a two 
> conductor tip-sleeve jack.  We know what  can happen when a patch cord 
> is plugged in at one end and the other end has two live surfaces that 
> will get touched with fingers or touch something grounded sooner or 
> later. Did industry practice simply expect common sense? Many older 
> patch cords have an exposed screw that holds the insulated sleeve on the 
> metal body of the plug that offers another chance for contact. Did 
> anyone ever consider the consequences, or did everyone get zapped at one 
> time or another?  Were loop supplies floating, or one side grounded?
> 
>       Bruce Gentry, KA2IVY
> 
> 
> 
> 
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