DIYbanter - View Single Post - SIMPLE electrical job. Cost via electrician? chg direct-wire to plug & socket

Bud--

On 2/5/2012 7:59 AM, wrote:
On Feb 4, 11:57 pm, wrote:
On Sat, 04 Feb 2012 20:58:27 -0500, wrote:

You entered this string saying: " His only recommendation was to use a
12 gauge appliance cord set, proper strain relief (not romex clamp) and
a high-quality 20 amp receptacle.

Your inference is that using 20 amp equipment, somehow makes it better,
which is not true if the circuit feeding the system is 15 amp. It would
then be a Nec code violation.

Perhaps not on a "dedicated" outlet. Using a 15 amp outlet on a 20
amp fuse definitely WOULD be an infraction.

If the 20 amp outlet was
on a 12 guage copper cable, connected to a 15 amp breaker it would
also not be , necessarily, a violation.

We've been over that one several times over the
years. While one section of NEC says it's OK to use
a SINGLE receptacle with a higher amp rating on a circuit
as long as it's the only receptacle, another section
of the code seems to preclude it.
I don't have the specifics here, but remember it was
Bud that found the other section of the code. At best,
it's ambiguous.

It is not ambiguous.

210.21 does not prohibit a 20A receptacle on a 15A circuit if it is the
only receptacle. The same article does not allow a 20A receptacle on a
15A circuit is there is more than one receptacle (including a duplex
receptacle). A lot of people see a flaw there (but the code panel
doesn't). (The article also does not prohibit a 100A SINGLE receptacle
on a 15A circuit.)

A grounding type 20A receptacle on a 15A circuit is *clearly* a
violation of 406.4.
(A 20A non-grounding type receptacle can be installed on a 15A circuit
if it is the only receptacle - extremely limited applicability.)

--
bud--