[Elecraft] Breakers for KPA1500?

[john at kk9a.com]

Neither Tony or I suggested making a 120v circuit from the two wire 240v
line using the ground as the neutral.  Yes you can run three conductor
Romex and have a 120v and 240v outlet but I do not see this as a good plan
as it could easily exceed 20 amps on one leg. Upgrading to higher amperage
circuit and you'll exceed the amperage rating for a standard 120v outlet. 
Two separate circuits are much easier to manage.

John KK9A


Don Wilhelm W3FPR wrote:

Tony,

While it is possible and safe to use only two wires plug safety ground
(Green Wire Ground) for a 240 volt receptacle or 240 volt only device
(in-home air conditioner, dryer, etc), it is quite unsafe to split off
for a 120 volt supply using one hot and ground - in that case (such as a
range that has a 120 volt outlet on it or a 120 volt fan) you MUST run 3
conductors plus ground.
The ground wire should never carry current.
An inspector would never approve it, and if you value your insurance
coverage, don't try it - it will be found after the fire!

73,
Don W3FPR