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To do it right, I'd re-wire the house with grounded wiring. This may
also require bringing the house up to code [electrically] which could
include linked smoke detectors inside and outside of bedrooms, GFI outlets
in certain locations, and "Arc Fault" for the bedrooms.
Probably will need a new main electrical panel.
The advantage of rewiring / doing everything to code is the insurance
company likes this in case of electrical fire (May not pay if electrical
work was not done to code and caused property loss or personal injury), and
then resale of home easier / possibly more value. Not to mention that
everything is more safe.
Some electronic surge suppressors and electronic power supply surge
suppressors depend on a good ground to function properly. Sometimes to
filter noise out as well. I do not know if your mom has a lot of electronic
gizmos or not, but a future buyer of the house probably would. Something to
think about.
And when re-wiring, you can switch to 20 amp circuits. Add additional
outlets and better handle today's electrical needs.
Arc Fault info...
http://www.rd.com/content/openContent.do?contentId=19631
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Re: Grounding the receptacle boxes in an old house
