[Elecraft] Breakers for KPA1500?

[Don Wilhelm]

Erik,

One of the benefits of using a new and direct line to the breaker box to 
power both 240 and 120 in the shack is that the 120 volt (and the 240 
volt) green wire ground is a straight run to the breaker box instead of 
being run willy-nilly from receptacle to receptacle through the house.
The one dedicated run creates less noise on the power to the shack.

73,
Don W3FPR

On 7/10/2018 11:40 AM, Erik Basilier wrote:
> It is abundantly clear that 3 conductors plus protective ground are needed
> if there will be any load, on the same circuit, that requires 120V as
> opposed to 240V only. I certainly agree 100%. It is also clear that the
> person who installs 240V for the PA only could get away with one conductor
> less. In that case, his other ham equipment would presumably run on older
> 120V wiring. So, the person contemplating the installation of 240V for the
> PA has a choice: Should he add the extra conductor to make possible
> operation of 120V equipment on the new wiring? An argument against it would
> be that it puts more load on the new wiring and it doesn't utilize the 120V
> capacity already installed. However, as has been pointed out, ham equipment
> doesn't constitute that much of a load, even for a station at full legal
> power. My personal feeling is that it is a good idea to use the new wiring
> (with all 4 conductors) for all the ham equipment, as mixing the old and new
> power circuits provides more opportunity for disastrous transient damage
> with a nearby lightning strike. Just my 2c.