According to Tony Hwang :

Doug Miller wrote:

In article akDOb.164501$X%5.104400@pd7tw2no, Tony Hwang wrote:

If the receptacle is split, they're fed by different circuit.

Complete and utter nonsense. They could just as easily be fed by a different
leg of the same circuit.

At least not in my house. I don't want to lose both at the same time.
My doing.

Are they on tied breakers?

If not, it's a code violation.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.