2-wire 120VAC Circuits

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PlantElectrician

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Plant Electrician
Hi folks!
1st newbie post. I get calls in the plant regarding bad outlets; maybe a Hi-Lo hit it, etc. I've only been here since January and a lot of the 120V wiring is original from the '90s.
Question is was there a cut-off point (NEC edition) when 2-wire circuits were no longer allowed? One I worked on yesterday had no ground. The run was rigid conduit, but I don't think that matters. I do recall when changing non-grounding outlets in a home on a 2 wire system one may use a grounded receptacle and place a "no ground" sticker on it or something to that effect.
We're going into a big shutdown and I don't know whether to pull in some grounds or not. Thank all of you and
Respectfully
 
Metallic conduit can be the EGC, see 250.118.
 
Not necessarily, listed connectors or locknuts can be the conduit termination means and still be recognized as the EGC.
 
roger said:
Not necessarily, listed connectors or locknuts can be the conduit termination means and still be recognized as the EGC.
Click to expand...
OK, thank you. I've just always bonded the conduit in case of a separation from the enclosure where there would be a ground bus and an enclosure grounding pigtail, say at the panel or an outlet box. Especially in the case of concentric KO's.
Anyway I won't worry about it; there have been many before me that had ample opportunity to repair this if needed. I just want folks to be safe.
Respectfully,
 
You're welcome. You can use a meter or receptacle analyzer to be sure the devices do in fact have continuity at the ground terminal.
 
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