"Percival P. Cassidy" wrote in message
...
On 04/01/11 02:47 pm, Mikepier wrote:

If it is the only receptacle on the circuit (and 20A breaker and #12
wire) it should be 20A.

In any case, there is no reason not to use a 20A receptacle.

Thanks. It is the only outlet for a wall A/C unit.

And the wire is 12/2 BX. So the metal clad is ground. The box is
steel. I am still going to put a green ground wire tail from the box
to the outlet.

But doesn't BX already have a bare copper ground conductor? The metal
sheath isn't the only ground connection -- at least, if I am remembering
correctly from the last time I used it, about ten years ago.

Perce

** MC cable has an additional copper ground conductor