by sparx »
Sat Apr 19, 2008 8:23 pm
Hi,
you may reuse notched joists but should use protector plates sold for the pupose to prevent nail penetration, most electrical wholesalers stock them.
You may keep to original heights but 'no worse than before' even for a full rewire, part 'M' is not retrospective, only applies to new build.
regards SPARX