The electrical standards here have evolved over the years, but older installations do not need to be upgraded to comply with the newer standards unless there is a significant amount of work done to the old system. ? How the word significant is defined is subject to a lot of controversy. :-)
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I could use the "it was compliant when it was constructed" argument and use the neutral as the grounding means with no GFCI/RCD system on that circuit? But, especially since it is so easy to bring it into compliance with modern standards....why not do so.... :-)
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