Q: How do you wire the R-3MT (Safe-Test Point) for single phase?

For single phase wiring of the R-3MT

L1 - L1

L2 - L2

L3 - N (if desired otherwise just cap)

G - GROUND

OR

L1 - L1

L2 - N (if desired otherwise just cap)

L3 - GROUND

G - GROUND