grounding pigtails.

[n84jrnation]

I was working at a new contruction and from former jobs every j box that had a splice in it I grounded the box with a ground pig tail. I was informed that the only time I needed to ground the box is if it start s for a device... outlet switch oor light not junction boxes as emt is sufficient ground. True or false.

 

[Dennis Alwon]

I was working at a new contruction and from former jobs every j box that had a splice in it I grounded the box with a ground pig tail. I was informed that the only time I needed to ground the box is if it start s for a device... outlet switch oor light not junction boxes as emt is sufficient ground. True or false.

False, If there is a splice in the box then you must ground the box. Art. 250.148

250.148 Continuity and Attachment of Equipment
Grounding Conductors to Boxes. Where circuit conductors are spliced within a box, or terminated on equipment within or supported by a box, any equipment grounding conductor(s) associated with those circuit conductors shall be connected within the box or to the box with devices suitable for the use in accordance with 250.148(A) through (E).
Exception: The equipment grounding conductor permitted in 250.146(D) shall not be required to be connected to the other equipment grounding conductors or to the box.

 

[electricalist]

That makes no sense.
Are you saying that if you ran a half in emt to a 4 sq then out again and had splices in that box you would need a bonding bushing to connect the emt egc to the box

 

[don_resqcapt19]

That makes no sense.
Are you saying that if you ran a half in emt to a 4 sq then out again and had splices in that box you would need a bonding bushing to connect the emt egc to the box

No. The rule says that if there is an EGC of the wire type and if there are splices or termination in the box, then the EGC must be connected to the box. This applies anytime you have an EGC of the wire type, even if the wiring method itself is an EGC.

 

[Dennis Alwon]

That makes no sense.
Are you saying that if you ran a half in emt to a 4 sq then out again and had splices in that box you would need a bonding bushing to connect the emt egc to the box

No, It is just stating that if there are circuit conductors that are spliced then any equipment grounding conductor that is associated with those conductors must be bonded to the box. If there isn't an equipment grounding conductor or the wires pass thru then you do not have to bond the box.

 

[electricalist]

That makes sense.
I the op said emt is sufficient ground. And even though conduit can be used as a ground it has stipulations. I agree if i pull a wire for my egc i would need to use the wire for all my grounding requirements

 

[jap]

connected within the box or to the box with devices suitable for the use in accordance with 250.148(A) through (E).

I have trouble with the way this is worded.
Why wouldn't you just say "must be connected to the box" only?
Why does it say connected "Within the box" or ?

To me "within" the box and "to the box" has 2 completely different meanings.

This wording, to me, makes it sound like you could connect the incoming and outgoing EGC with a wirenut "within" the box and not take it to the box
"OR"
"Connect it to the box" with an appropriate means of connection.

Although I bond to the box every time there's a splice also.

JAP>

 

[don_resqcapt19]

connected within the box or to the box with devices suitable for the use in accordance with 250.148(A) through (E).

I have trouble with the way this is worded.
Why wouldn't you just say "must be connected to the box" only?
Why does it say connected "Within the box" or ?

To me "within" the box and "to the box" has 2 completely different meanings.

This wording, to me, makes it sound like you could connect the incoming and outgoing EGC with a wirenut "within" the box and not take it to the box
"OR"
"Connect it to the box" with an appropriate means of connection.

Although I bond to the box every time there's a splice also.

JAP>

The more specific part of the rule in (C) makes it clear that there must be a connection between an EGC of the wire type and a metallic box.