Maximum Number of Zones

[dan]

It is probably best to not connect the relay power supply to the breadboard. Use that to power the relay boards only.

OKAY.

So do I use the isolated pins at the corner of the RELAY MODULE?  (GND VCC JD-VCC)
Yes,

Assuming I use the JD-VCC should I place the jumper on the VCC to keep me out of trouble.
That is probably a good idea.
To power would I connect multiple wires from the PWR supply - to GND and PWR supply + to JD_VCC to each of the RELAY MODULES?
Yes.
Do I need to connect the other GND next to IN1 on each of the RELAY MODULES to the - on the BREAD BOARD?
Yes. That completes the circuit with the bread board.

Is the BREAD BOARD wire heavy enough for powering the RELAY MODULE or should I use a larger gauge?
Probably, but if you will have a lot of relays on at the same time heavier gauge wire would be good. If the wire is too thin it will get hot.

Thanks again.