: "install a GFCI receptacle. The ground lug
: should not be connected to anything, but the GFCI
: protection itself will serve instead. The GFCI
: will also protect downstream (possibly also two prong
: outlets). If you do this to protect downstream outlets,
: the grounds must not be connected together. Since it
: wouldn't be connected to a real ground, a wiring fault
: could energize the cases of 3 prong devices connected
: to other outlets. Be sure, though, that there aren't
: indirect ground plug connections, such as via the sheath
: on BX cable.
: The CEC permits you to replace a two prong receptacle with a
: prong if you fill the U ground with a non-conducting goop.
: Like caulking compound. This is not permitted in the NEC.
: The NEC requires that three prong receptacles without ground
: that are protected by GFCI must be labelled as such."
: this and more at:
: http://www.faqs.org/faqs/electrical-wiring/part1 /
But, that won't do anything for providing an earth connection for
computers, surge protectors, etc. although it certainly DOES add
in the safety factor for the GFCI lines.