> On 12/28/2022 6:00 PM, Adrian wrote:
> > It is interesting to see the various opinions on Neutral and electrical
> > safety.
>
> One of the important differences between regulations in different
> countries is how neutral and ground are bonded. It's NOT a matter of
> opinion, it's law, but the law differs between countries.
>
> 73, Jim K9YC
I'll go one step further and comment that the differences vary at a more
granular level than just country to country. Here in the US, electrical
codes are adopted by the AHJ (agency having jurisdiction). The AHJ may be a
state, a county, a city, a township, a borough, a village, or whatever the
case may be.
Many AHJ's rely on the National Electric Code (NEC, also known as NFPA 70)
as the basis for their regulations, but AHJ's can, and do, adopt different
editions of NEC, or adopt NEC with additions or deviations. Or you can have
an AHJ that isn't an AHJ at all and has no building codes (been there, done
that). Or an AHJ can have its own unique electrical code (Chicago comes to
mind). NEC isn't a law, it's a standard. An AHJ adopting that standard
effectively makes it law.
Someone else mentioned R56. I have never, ever, seen R56 adopted as a
standard by any AHJ. I have seen state, county, and municipal bid specs
state that R56 compliance was required for a given project, but not as an
AHJ enforcing a code. That's not to say that R56 isn't a standard, it's
just not one that I have seen adopted by an AHJ. There are a few places
where R56 and NEC do diverge (keep in mind R56 isn't revised coincident with
NEC's annual changes), and in such cases, you're bound by the AHJ's
requirements which, per above, are usually NEC or NEC-based so in most cases
"NEC wins".
--- Jeff WN3A
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