$?$ provides a method for installing an equipment grounding conductor for receptacles that are being replaced at a location where an equipment grounding conductor is desired but is not present.

$$ a$.$ Section $210\mathrm{.}8(A)$ and $($B$)$

b$.$ Section $250\mathrm{.}4(A)$

c$.$ Section $250\mathrm{.}122$

d$.$ Section $250\mathrm{.}130($C$)$