Robert11 wrote:

....
Bought a bunch of those fitting you use with PVC, and are attached "by
welding" together with a solvent.

Now I'm wondering if I bought the right things:

Are these solvent fastened fittings Code compliant for outside wiring where
the PVC tubing and fittings would be hugging the outside house wall ?

Or, must I use these liquid tight metal connectors ?
**(I don't know if they come in plastic also; do they ?)

Is the Code specific on this ?
....

Yes.

I worry when I hear "pipe" and "electrical" in the same sentence.

You should be talking about non-metallic conduit.