guys/gals,

i have been searching the NEC code for quite a bit tonight. i am coming here for help as my search is not really getting me what i need. here is the situation. i am looking to cite the nec code that states this>>>

(obviously put into my own words)

if you replace a 2 prong outlet with a 3 prong outlet, you must ground the outlet.



if anyone can help by finding exactly where or posting the code itself, it would be greatly appreciated. right now i will be back to searching!


as always>>>>>> Thank You in advance for your replies!

It is my understanding (and I have done a fair bit of electrical work that was code inspected) is that the 3rd (grounding) prong must have an independent connection back to the main panel where it will be "bonded" to the neutral (ground) side of the power line. In new construction this is usually done by a 3rd wire (either bare or green insulation) in the cable. In older construction, as in replacing a 2 prong outlet with a 3 prong outlet, the cable typically only has 2 conductors. If however the old wiring is BX style cable (spiral metal sheath jacket) that can be used as the ground path provided it is continuous from the outlet to the power panel.

Since the code is frequently updated and revised you might want to call a local electrical inspection service to verify the current requirements.

Mr. Foreclosure

Thank you Mr. Forclosure. i kind of came up with the same thing and was trying to cite from the NEC the specifics.

in laymans terms, i have this

if a 2 prong outlet is replaced with a 3 prong outlet it is considered and upgrade to the electrical system and the 3 prong outlet must be grounded.


in NEC talk i have found this

"Strict interpretation of 250.130(C) would require an individual equipment ground being run to every receptacle you plan to replace. There is no provision for connecting to another equipment ground when you are replacing receptacles."

and

The NEC also has provisions that permit the use of grounding-type receptacles in nongrounded wiring (for example, the retrofit of 2-wire circuits) if a GFCI is used for protection of the new outlet (either itself or "downstream" from a GFCI). Art. 406.3(D)(3).

Your question is answered in detail HERE

NEC 250.130(C) simply allows options for effectively grounding the receptacle, where the original circuit does not include a grounding conductor.