Originally Posted By: jtedesco This post was automatically imported from our archived forum.
Scenario:
A two gang metal box has two, 12/2, W/G NM-B cables, connected to a receptacle, that are part of a 20 ampere branch circuit, and two 14/2, W/G NM-B cables, connected to a switch, that are part of a 15 ampere lighting branch circuit.
The two equipment grounding conductors, of the 15 ampere circuit are joined together with a suitable splicing device, and the two equipment grounding conductors of the 20 ampere circuit are also joined together with a suitable splicing device.
Question: Are the equipment grounding conductors also required to be joined together?
Originally Posted By: jtedesco This post was automatically imported from our archived forum.
jwortham wrote:
I would have to say yes.
This would ensure that both the receptacle and the switch are at the same potential.
Jeffery, you are correct! See this rule in the 1999 NEC:
Quote:
250-148. Continuity and Attachment of Equipment Grounding Conductors to Boxes
Where more than one equipment grounding conductor enters a box, all such conductors shall be spliced or joined within the box or to the box with devices suitable for the use.
Connections depending solely on solder shall not be used.
Splices shall be made in accordance with Section 110-14(b) except that insulation shall not be required.
The arrangement of grounding connections shall be such that the disconnection or the removal of a receptacle, fixture, or other device fed from the box will not interfere with or interrupt the grounding continuity.
Originally Posted By: jtedesco This post was automatically imported from our archived forum.
No particular reason, except that this question was asked in an area that has just started to use the 1999 edition.
That's why I used that reference
It is the same the the 2002 NEC.
To be honest with you, if I knew that I could get the Home Inspectors to use the NEC, I would send anyone who asks me for one a copy of the 1993 version (edited through Chapter 4 and with pools) ----- and by me that would be good enough.
HI's do not act as electrical inspectors anyway, and if some get the inspection of a 50 year old dwelling job, then they can use the 1953 edition for all I care!
Jerry Peck is getting very close to a full set of codes so we can ask him!
Originally Posted By: jpeck This post was automatically imported from our archived forum.
jtedesco wrote:
Jeffery, you are correct! See this rule in the 1999 NEC:
Quote:
250-148. Continuity and Attachment of Equipment Grounding Conductors to Boxes
Where more than one equipment grounding conductor enters a box, all such conductors shall be spliced or joined within the box or to the box with devices suitable for the use.
Connections depending solely on solder shall not be used.
Splices shall be made in accordance with Section 110-14(b) except that insulation shall not be required.
The arrangement of grounding connections shall be such that the disconnection or the removal of a receptacle, fixture, or other device fed from the box will not interfere with or interrupt the grounding continuity.
Actually, Bob is correct. Based on the wording of your original question.
The equipment grounds are not required to be connected together. "or joined ... to the box with devices suitable for the use"
Originally Posted By: jtedesco This post was automatically imported from our archived forum.
Jerry:
My original question above read as follows:
Quote:
Question: Are the equipment grounding conductors also required to be joined together?
Also, please read the (a) paragraph in the 99 NEC for "Metal Boxes"
Quote:
250-148 (a) Metal Boxes. A connection shall be made between the one or more equipment grounding conductors and a metal box by means of a grounding screw that shall be used for no other purpose or a listed grounding device.
Note a listed grounding device includes a green colored clip.
Originally Posted By: jpeck This post was automatically imported from our archived forum.
Joe T.,
That is what I am referring to.
jtedesco wrote:
Question: Are the equipment grounding conductors also required to be joined together?
They are not "required to be *joined together*". They MAY BE connected / joined / attached / etc. to the box (using suitable and approved means, of course).
Your reference stated more than one choice, only one of which was *joined together*. "Where more than one equipment grounding conductor enters a box, all such conductors shall be spliced or joined within the boxor to the box with devices suitable for the use. "
You could say that they are "electrically" joined together by virtue of their contact with the metal box, but they are not "joined together". I was just pointing that out because, with code related items, the wording is there for a purpose. And, in this particular case, two options are offered: 1) "spliced or joined within the box", meaning they are joined together within the box, or, 2) "spliced or joined ... to the box", meaning they are not joined together, but are joined to the box.
A minor, but significant, change. I.e., they do not have to all be in a wire nut ("joined together") if they are all joined to the metal box. I just did not want it to leave the impression that they must all be 'joined together', indicating something like a wire nut is required.
Don't take the above the wrong way, I keep learning from your posts. They make one (at least me) think. And thinking is good.
Originally Posted By: jtedesco This post was automatically imported from our archived forum.
Mike Parks wrote:
2002 NEC 250.148 Exception: takes you to 250.146(D).
Bob is correct. Not 'necessary required'.
Mike P.
The exception applies to the second set of an isolated green equipment grounding conductor that is used for the purposes of the type of receptacle with the orange triangle that is not one that is used in a dwelling.
HI's don't get into these areas unless the circuit that is run will be for that purpose, "where required for the reduction of electrical noise (electromagnetic interference) on the grounding circuit, a receptacle in which the grounding terminal is purposely insulated from the receptacle mounting means shall be permitted.
Originally Posted By: jtedesco This post was automatically imported from our archived forum.
I think that is required?
See this as an example:
Quote:
Our technical staff includes certified biomedical equipment technicians, clinical engineers and radiology field service engineers. Technicians have completed a minimum of an associate's degree in biomedical engineering technology, with the average length of biomedical equipment maintenance experience of nine years.
Our technicians have certificates of completion from the leading manufacturer service training schools.
The experience of our staff allows NovaMed to understand and respond to each hospital's need for a professional and effective clinical equipment service team.
How does the HI inspect that circuit to see if it was installed properly?
