"Cheater plug"
Older knob and tube wiring doesn't usually have a ground wire. The junction box likely would NOT be grounded, so a "cheater plug" would be worthless for such an outlet. The only way to get a grounded outlet is to attach the ground socket to a good ground.
Nowadays I've noticed that non-grounded outlets are generally not carried by the home improvement stores. Because this '41 house had a number of non-grounded outlets that were worn out to the point that plugs wouldn't stay in, I changed them over to new grounded outlets. Since I'm the only person here, I know which outlets have real grounds and which don't. Eventually I'll have the knob and tube replaced with modern wiring. Half the house (kitchen, family room, laundry closet, enclosed patio) has excellent wiring... either rigid conduit that acts as ground or metal armored cable, armor as ground). The rest, I could, as an interim solution I suppose, run ground wires from the various outlets, under the house, to the rigid grounded conduit for the other wiring. It's not the optimal solution (I understand that all ground wires should be routed back to the ground bar in the breaker panel).
When I get a round toit...
Older knob and tube wiring doesn't usually have a ground wire. The junction box likely would NOT be grounded, so a "cheater plug" would be worthless for such an outlet. The only way to get a grounded outlet is to attach the ground socket to a good ground.
Nowadays I've noticed that non-grounded outlets are generally not carried by the home improvement stores. Because this '41 house had a number of non-grounded outlets that were worn out to the point that plugs wouldn't stay in, I changed them over to new grounded outlets. Since I'm the only person here, I know which outlets have real grounds and which don't. Eventually I'll have the knob and tube replaced with modern wiring. Half the house (kitchen, family room, laundry closet, enclosed patio) has excellent wiring... either rigid conduit that acts as ground or metal armored cable, armor as ground). The rest, I could, as an interim solution I suppose, run ground wires from the various outlets, under the house, to the rigid grounded conduit for the other wiring. It's not the optimal solution (I understand that all ground wires should be routed back to the ground bar in the breaker panel).
When I get a round toit...