[GreenKeys] Four-prong wiring question on M19s...

[E.]

Ah yeah, I know they do :) … it has been my understanding - and I could always be wrong (usually am on most things, according to my wide ;p heh), that many of the 15/19’s were converted from four prongs, to a standard three prong setup.  My first 19 is like that… so rare being if it is the case... and if not, then my bad :) ~


> On Jun 25, 2020, at 9:17 pm, Jim Haynes <jhhaynes at earthlink.net> wrote:
> 
> On Thu, 25 Jun 2020, E. wrote:
>> 
>> with the ohm meter to try to trace things out.  To recap, the 19 has the rare four-prong AC plug and the table has two four-prong jacks - one in
> 
> But it isn't rare.  Practically all M15/19 bases have that four-prong plug
> for AC in (two wires) safety ground (one wire) and AC that has been through the power switch on the base, so that switch can control other
> things plugged into the electrical service unit.