Please could someone confirm that I understand how to prevent electrocution when using at AC powered telescope?
(1) If the scope lacks at three-prong plug, have one installed by an electrician.
(2) If an older scope has a three-prong plug, consider having an electrician check that the ground is actually properly connected.
(3) Use only heavy-duty, three-prong extension cords in perfect repair.
(4) Use only three-prong, grounded outlets. (Corollary: If only two-prong outlets are available, do not use the electric drive!)*
(5) If the available three-prong outlet is also GFI, great! If not, plug a GFI extension cord into the outlet, and the longer three-prong extension into that.
(6) Be smart. Especially when joining several extension cords together, protect the joined plugs from puddles, melting snow, or excessive dew.
And, Larry: You presumably know how to test the wiring on that orange tube's base?!
, I just read that "a GFCI works even on two slot receptacles." Does this mean that I do not need to worry whether the outlet is three prong or two slot, or is a three prong still better?