I live in La Canada, California.
I bought a circuit tester of the $8.00 variety that tests receptacles for ground, faulty wiring, and GFCI. I have a house built in 1955. The tester indicates OK and does not indicate a weak ground, on a certain 3-pin receptacle that I determined to have no green grounding wire except to the outlet box, and moreover, the resistance measured between the neutral socket and the ground socket is 5 ohms (seems much too high). By inspecting the wiring I find that the only ground connection from the outlet box to the service panel goes through flexible steel conduit that has no straight-through solid wire. The conduit contains only one white and one black wire.
If the 3-pin receptacle had been installed in 1960, shouldn't it have been grounded better than that?
What kind of tester should I be using to determine this kind of fault, if it is a fault?