My friend's house is mostly 2 wire non-metallic. We've noticed that wherever there is a newer 3 prong outlet, there is a jumper wire from the outlet's neutral terminal/screw to the ground screw. I'm guessing that this was viewed as a simple method of providing some emergency route to ground should a 3 prong appliance short circuit. Wile we realize that a separate ground wire is ideal, we're wondering if the current situation is a real problem - Don't ground wires and neutral wires come in contact at the Neutral Buss bar back at the breaker panel? Is it simply a matter of greater saftey through redundancy (i.e. a separate grounding wire)? Finally>> From reading past messages in the Hometime archives, I've learned that, assuming pulling new ground wires is impractical, we can get at least some shock protection by replacing all the ungrounded outlets with GFCIs (and labeling then as ungrounded). Is the GFCI route a better alternative than what we have now? If we use the GFCIs should we jump the neutral to the GFCI ground screw? Your thoughts are appreciated!