[Elecraft] 120V vs 240V

[ab2tc]

Hi all,

I was not advocating using the safety ground of the 240V cable for a neutral
return for a 120V outlet (clearly against code). I have not done a a
combined 120/240V run myself but I thought it was possible to get a complete
red/black/white/blank cable to do this in a single run. Rummaging around in
my supply of electrical wire I found a red/black/white piece of cable but
curiously it had no safety ground wire. Anyway, I suppose running two cables
from two breakers is still not too much trouble.

AB2TC - Knut


Don Wilhelm-4 wrote:
> 
>   Chuck,
> 
> I would not advocate using one side of the 240 volt feed and neutral for 
> a 120 volt feed.  If the need is to run 240 volts to the shack as well 
> as 120 volts, pull two lines, and put a breaker on each of them.  Yes, 
> your "solution" will work with a 3 wire with ground wiring run, but if 
> split out to two 120 volt sources, the current on the neutral may exceed 
> expectations for the wire size used.
> 
> A 240 volt AC run can be made with 2 conductors and safety ground.  A 
> 120 volt AC run can be made using 2 conductors and safety ground.  If 
> you want 240 volts, start with a 240 volt run from the service panel, if 
> you want 120 volt service, start with a 120 volt run from the service 
> panel.  Do not mix the two (even though it "works").
> 
> Your safety is at stake - stick to the NEC requirements and guidelines.
> 
> 73,
> Don W3FPR
> help support this email list: http://www.qsl.net/donate.html
> 
> 


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