Where is a grounding pigtail necessary

[The electron man]

Hey I'm an electrician in NYC and was wondering except gfci where else is a grounding pigtail necessary

 

[infinity]

It's required when using a metal box with a receptacle that is not self-grounding. A self-grounding GFCI receptacle does not require one.

 

[The electron man]

It's required when using a metal box with a receptacle that is not self-grounding. A self-grounding GFCI receptacle does not require one.

Thanks for your reply
1 how would I know if its self-grounding

2 what about light switches

 

[LarryFine]

Hey I'm an electrician in NYC and was wondering except gfci where else is a grounding pigtail necessary

Welcome to the forum.

If you're asking what I think you're asking, the answer is "everywhere", not just for GFCIs.

The rule effectively says that the EGC pathway can't be interrupted by disconnecting a device.

 

[LarryFine]

It's required when using a metal box with a receptacle that is not self-grounding. A self-grounding GFCI receptacle does not require one.

Right. In this regard, grounding the device has options, but grounding the box is always mandatory.

 

[The electron man]

Welcome to the forum.

If you're asking what I think you're asking, the answer is "everywhere", not just for GFCIs.

The rule effectively says that the EGC pathway can't be interrupted by disconnecting a device.

First thanks for the warm welcome

What do you mean by ?

(interrupted by disconnecting a device)

 

[hbiss]

What do you mean by ?

(interrupted by disconnecting a device)

Theoretically by removing a self grounding switch or receptacle from the box that it's mounted to.

-Hal

 

[don_resqcapt19]

Theoretically by removing a self grounding switch or receptacle from the box that it's mounted to.

-Hal

The intent of 250.148(B) is that the removal of the device does not interrupt the continunity of the EGC to any down stream devices. It is not intended to apply the way you have described it. The language in 300.13(B) for the grounded conductor is better.

 

[infinity]

2 what about light switches

Switches do not require a bonding jumper when attached to a recessed metal box by the two 6-32 screws.

 

[LarryFine]

First thanks for the warm welcome

What do you mean by ?

(interrupted by disconnecting a device)

Imagine a receptacle with two grounding terminals. They used to have them, but kept the rule after they stopped making them.

As mentioned above, the same thing applies to the neutral in a MWBC, even though they added the rule requiring handle ties.

 

[mtnelect]

I don't like using a device for termination purposes, so I "Pig Tail" everything.

 

[synchro]

1 how would I know if its self-grounding

A self grounding receptacle has a little brass spring clip that maintains contact with the mounting screw. At least I think it's brass.

 

[jap]

I don't like using a device for termination purposes, so I "Pig Tail" everything.

I think you mean for "splicing" purposes.

Some receptacles actually do come with pre-wired pig tails where you don't actually terminate your wiring on the device screws.

JAP>

 

[hbiss]

The intent of 250.148(B) is that the removal of the device does not interrupt the continunity of the EGC to any down stream devices. It is not intended to apply the way you have described it. The language in 300.13(B) for the grounded conductor is better.

That's why I said theoretically. I can't think of how you could interrupt the continuity of the EGC by removing a device.

If you are talking about the grounded conductor (neutral), that's another story. 300.13(B) refers only to a MWBC probably because of its consequences, but I would take it further to prohibit any neutral from being fed through a device (in one screw and out the other on a receptacle) since removing the receptacle would interrupt the grounded conductor to downstream devices. But that would only result in inoperable devices downstream.

-Hal

 

[don_resqcapt19]

That's why I said theoretically. I can't think of how you could interrupt the continuity of the EGC by removing a device.

.....

-Hal

It is my understand that the rule is very old and at one time some wiring devices had two grounding screws.

 

[The electron man]

Switches do not require a bonding jumper when attached to a recessed metal box by the two 6-32 screws.

What if its not recessed ?

 

[infinity]

What if its not recessed ?

If you used something like an exposed cover on an exposed box then the cover screws would be both 8-32 and 6-32. That would still be code compliant to bond the switch.

 

[tom baker]

No pigtail needed for a receptacle mounted on a “bell box” where there is direct metal to metal contact between device yoke and metal box, IE remove the plastic washer on the 6/32 screws (The rule says surface mount box). And as a FYI it is nearly impossible to attach a pigtail to the threaded boss in a bell box!