Location Maricopa County, AZ
New construction here has wire nuts on HOT and NEUTRAL, but the ground
wire is twisted and then crimped with a metal tube.
Does code allow, in every location, to use a wire nut and not this
Seems rather improbable that anyone here would
know what is or isn't allowed in every location.
Here in NJ it's definitely permissible to use wire
nuts on ground wires for receptacles, switches,
typical junction boxes, etc. And it's OK per NEC.
I've also seen the crimped approach used here in new
construction, but that was back in the 80s.
Not sure if they are still doing it.
I do not know anything about Cities or states codes.
We are talking about earthquakes, all new structure in west cost
I believe now most be able move and not be bolted as some you emphasize.
Why example: I am sure that you saw this one time or other,
Take table cloth on the table with whatever you might have on it,
Grab that table cloth and pull for it fast nough what happens to the stuff that
you have on it "it remain there on the
table, but if the stuff was anchored what would happen to it? Now do you have
idea how seismic works?
The Nec generally doesn't always give specific types of devices. In this
case there are a number of mechanical devices that are acceptable,
including wire nuts, and splice caps. Even Joe Arpaio would approve.
I believe the issue with the number of wires that may be crimped (or nutted,
for that matter) is that the code calls for them to be mechanically secured
with an approved device. The "approved" devices aren't specified in the code,
rather separately "listed" by UL, or other test lab. The crimp ferrules, like
wire nuts, have a specified size and number of wires that are acceptable.
I used crimps some time back but have found the green wire nuts, with the hole
in the top for the wire to the switch/outlet, to be easier to use. The cost
of all of these things is trivial so use the easiest.
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