Metal box nm cable entering from wall

[Jpflex]

How does this connection from inside wall to metal 4 square box look? After punching out 1/2” KO I used an nm connector to secure nm cable to box.

Is using an nm connector with lock nut and bushing required even if staples secure nm cable within 12” of box?

 

[Jpflex]

Close up

 

[infinity]

Is using an nm connector with lock nut and bushing required even if staples secure nm cable within 12” of box?

For a metal box yes a connector is required. A bushing is not required.

 

[Tulsa Electrician]

I think it looks good. Nice job

 

[LarryFine]

You could even have used a pop-in connector, and once the wall is closed, what's inside doesn't matter.

 

[Jpflex]

You could even have used a pop-in connector, and once the wall is closed, what's inside doesn't matter.

But I can’t just pass through nm cable through knockout without some sort of connector?

 

[Jpflex]

Infinity answered this never mind

 

[Jpflex]

I have been bonding a jumper wire to every 4 square metal enclosure with a green ground screw to EGC green wire entering from EMT conduit but I’m afraid I’m over kill and wasting time or is this right even though receptacles have bonding effect as well as EMT

Did 2023 change anything?

 

[LarryFine]

But I can’t just pass through nm cable through knockout without some sort of connector?

Negatory, morning glory. The cable should be secured to the box.

 

[LarryFine]

I have been bonding a jumper wire to every 4 square metal enclosure with a green ground screw to EGC green wire entering from EMT conduit but I’m afraid I’m over kill and wasting time or is this right even though receptacles have bonding effect as well as EMT

The EMT is at least as good an EGC as a separate wire EGC. But, if you run a wire, it should connect to any box where its circuit conductors terminate or join others.

 

[infinity]

I have been bonding a jumper wire to every 4 square metal enclosure with a green ground screw to EGC green wire entering from EMT conduit but I’m afraid I’m over kill and wasting time or is this right even though receptacles have bonding effect as well as EMT

If the EMT contains a wire type EGC it must connect to the box. If not then only the EGC from your NM cable could need to be connected to the box.

 

[Jpflex]

If the EMT contains a wire type EGC it must connect to the box. If not then only the EGC from your NM cable could need to be connected to the box.

But it is proper or required for every box to be bonded to EGC through pigtail jumper even though there is continuity from previous box?

Would inspectors fail for not having a jumper to each nm EGC within each box?

 

[infinity]

But it is proper or required for every box to be bonded to EGC through pigtail jumper even though there is continuity from previous box?

Would inspectors fail for not having a jumper to each nm EGC within each box?

All wire type EGC's must be connected together with a single bonding jumper to the metal box.

 

[Rick 0920]

There was an argument (discussion) at one time that if conductors passed through a metal box without splices or terminations that the box itself did not need to be connected by the wire type EGC. I think this is still in the NEC but I'm not sure.

 

[LarryFine]

There was an argument (discussion) at one time that if conductors passed through a metal box without splices or terminations that the box itself did not need to be connected by the wire type EGC. I think this is still in the NEC but I'm not sure.

That's what I was alluding to in post #10.

 

[Jpflex]

All wire type EGC's must be connected together with a single bonding jumper to the metal box.

Someone else here I’m the code forum told me otherwise because the EMT already counted as an EGC and therefore I did not have to bond evert metal box

Here’s a pic of what I’m doing with EGC pigtail bonding

 

[Jpflex]

I can’t fin

All wire type EGC's must be connected together with a single bonding jumper to the metal box.

i can’t find the NEC code on this

 

[Jpflex]

The EMT is at least as good an EGC as a separate wire EGC. But, if you run a wire, it should connect to any box where its circuit conductors terminate or join others.

Ok it’s good to know I’m not doing unnecessary work

 

[infinity]

Someone else here I’m the code forum told me otherwise because the EMT already counted as an EGC and therefore I did not have to bond evert metal box

Whoever told you that is incorrect. Look at 250.148.

 

[tthh]

Someone else here I’m the code forum told me otherwise because the EMT already counted as an EGC and therefore I did not have to bond evert metal box

Here’s a pic of what I’m doing with EGC pigtail bonding

You'll save some time and material with a Greenie wire nut.