Tangent: Interest Check: Belden Thicknet 10base5 Ethernet Coax

[Paul Berger]

On 2018-02-02 7:13 PM, Fred Cisin via cctalk wrote:
>> they might have different ground systems. If so, grounding both ends 
>> might produce a LARGE current through the cable, possibly enough to 
>> be hazardous.
>
> OB_Ignorant_Question:  Is that the reason why RS232 DB25 has both pin 
> 1 and pin 7?
Pin 1 is supposed to be protective (shield) ground and pin 7  is signal 
ground.

Paul.