[Elecraft] regarding the green wire

[ron]

I think we have missed the point. Any line powered device that has a 
conductive enclosure should have that enclosure bonded to the 'green 
wire'. It is a personnel safety issue. The KPA500 is line powered and 
has a metal enclosure.

REPLY:
Thus my point, the power supply for any radio is powered by AC and 
should be wired accordingly as suggested with the "green" wire.




   the KPA500 does *not* use a separate power supply. It has a built-in
power supply and so plugs directly into the mains outlet.

REPLY:
Thank you. I stand corrected that the unit power is directly supplied by 
AC thus the need for "green" wire.




A power supply transformer can't be considered to be totally isolating 
for safety purposes unless there is a shield between the primary and the 
secondary that is grounded to the primary.


REPLY:
I am aware of transformer supplies. I was referencing to switch-mode 
supplies (transformer less). I believe they have isolation between 
primary and secondary.
Radios using this type of supply should not need the "green" wire to 
radio. It should go to the power supply itself as explained above.


72
Ron, wb1hga