Change Summary

• An additional sixth provision was added to Article 250.130(C) for supplying an Equipment Grounding Conductor (ECG) to convert non grounded receptacles into grounded receptacles, and for branch circuit extensions where a ground was not originally present.
• This additional provision allows connection to an ECG that is part of another branch circuit which originates from the enclosure that the circuit for the receptacle or circuit originates.
• This sixth provision is found in Article 250.130(C)(4)

Expert Analysis

This additional provision brings the number of ways to add a ground to an existing circuit to six.
They are as follows:
(1)  All accessible locations on the grounding electrode system according to Article 250.50
(2)  All accessible locations on the grounding electrode conductor
(3)  Connection to equipment ground terminal bar housed in the enclosure where the receptacle
      branch circuit or the branch circuit originates
(4)  An equipment grounding conductor that is part of another branch circuit that originates from the
      enclosure where the branch circuit for the receptacle or branch circuit originates.
(5) On grounded systems, the ground service conductor in the service equipment enclosure
(6) On ungrounded systems, the ground terminal bar in the service equipment enclosure

Leviton Comment

Leviton makes duplex receptacles with and without grounding conductors. 

Receptacles without ground hole (cat #233) are for replacement receptacles where a grounding conductor does not exist.  Article 250.130(C)(4) identifies ways to convert ungrounded circuits to grounded circuits and enable the use of these grounded receptacles.

  223 Non                                   T5320
Grounding                                 Grounded
Receptacle                                Receptacle