[Amps] 240 Volt Blowers needed

[Jim Brown]

Jeff,

I don't know of current Code that permits a circuit that lacks an 
equipment ground conductor run with the current-carrying conductors. 
That sort of thing was permitted in much older Codes, and old work is, 
for the most part, grandfathered. But it remains a really bad thing. To 
understand one reason why this is bad for ham radio (and component audio 
systems), see Slides 122-129 in this link, which are slides for a talk I 
did at Pacificon last fall and will do at Visalia next month. There's 
also a safety issue.

http://k9yc.com/GroundingAndAudio.pdf

73, Jim K9YC

On Mon,3/20/2017 2:36 PM, Jeff DePolo wrote:
> Although a little different than the instant case, there are some situations
> where NEC not only allows but requires that you to bond neutral to the
> chassis of an appliance as a substitute for a separate EGC whre one doesn't
> exist.  Electric dryers, ranges, and ovens come to mind.