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.
73, Erik K7TV ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com