(C) Nongrounding Receptacle Replacement or Branch
Circuit Extensions. The equipment grounding conductor
of a grounding-type receptacle or a branch-circuit extension
shall be permitted to be connected to any of the following:
(1) Any accessible point on the grounding electrode system
as described in 250.50
(2) Any accessible point on the grounding electrode conductor
(3) The equipment grounding terminal bar within the enclosure
where the branch circuit for the receptacle or
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) For grounded systems, the grounded service conductor
within the service equipment enclosure
(6) For ungrounded systems, the grounding terminal bar
within the service equipment enclosure
Informational Note: See 406.4(D) for the use of a groundfault
circuit-interrupting type of receptacle.
A branch circuit extension to add a new receptacle outlet requires that the receptacle be a grounding-type receptacle. Does 210.12 come into play, I.E., is this a dwelling?Can a new ungrounded receptacle be connected to an existing ungrounded receptacle circuit.
BX (Armored Cable made before the bonding strip requirement of the 1950s) was a grounding means if part of a complete equipment grounding path. If the BX is part of a complete equipment grounding path in your example, and the BX is undisturbed as part of the circuit extension, then its "as installed grounding means" status is still intact.Example - connect to a nearby receptacle using wiremold to add a receptacle in the room. Assume the existing wiring is BX.
I submit, your first best meaningful answer will be from the electrical inspector who works the geographic location that the church is in. I've posted my perspective, above, but many here will disagree. The reason I suggest the local AHJ (or their representative) is because, in my opinion, and experience, the real world acceptance of existing wiring method out in the field, is different than the strong opinion, here. Your answer, from your local AHJ is the only one that really matters for that church.My application is a church built in the 1950's.
In this list I do not see the option of connecting to the BX cable/box system no matter the condition of the existing.
I submit, your first best meaningful answer will be from the electrical inspector who works the geographic location that the church is in. I've posted my perspective, above, but many here will disagree. The reason I suggest the local AHJ (or their representative) is because, in my opinion, and experience, the real world acceptance of existing wiring method out in the field, is different than the strong opinion, here. Your answer, from your local AHJ is the only one that really matters for that church.
I agree with your point, I believe Al is letting his personal experiences cloud his reading of that code section. His AHJ does not read it that way, but many many others do.
I may be flat out wrong. But other's here have stated real world experience similar to mine in this thread. I am definitely not alone.I submit doing it to code and safely is all that matters here.
Even when an AHJ allows a violation the installer is forever on the hook for it.