On Mon, 5 Jun 2017 07:26:10 -0700 (PDT), wrote:



And the probability of something coming loose on a typical Daisy chained circuit is a lot higher than with a homerun dryer circuit.

if you want to use a 3 wire 220V system, I suggest you attach an additional safety ground wire to the case of the appliance and connect it to a metal water pipe of other good ground.

m

Since the 60s, most of those 6-30 three prong receptacles are
actually connected to 10/3-wg Romex anyway since that was the standard
way it was manufactured. If you look in the box, you may see the bare
ground bonded to the box and the neutral connected to the receptacle.
Because of the higher temperature/ampacity ratings, stoves may still
be wired with SE cable (2 wire plus ground)