Bonding Jboxs

[joeyww12000]

The 4 square by 1' 1/2" 1900 jboxs on my job have a bonding screw installed in each box. Just because its there when Ive been making up my taps Ive been using it to bond each box. Is this necessary by code? Each box is bonded already by the conduit attached to it with the conduit being attached to the panels which are bonded by the EGC.... you know the drill.... just wondering here. Thanks

 

[JohnJ0906]

You have EMT with a separate EGC?

In that case, the 250.148(C) would apply, and, yes, you are required to bond the EGC to the box.

 

[walkerj]

I will add that if your conductors simply pass through without a splice, no bonding jumper is required.

 

[LarryFine]

The 4 square by 1' 1/2" 1900 jboxs on my job have a bonding screw installed in each box.

They come that way? Never seen it, but I guess it can be spec'ed.

Just because its there when Ive been making up my taps Ive been using it to bond each box.

Using what conductor, exactly?

Is this necessary by code? Each box is bonded already by the conduit attached to it with the conduit being attached to the panels which are bonded by the EGC.... you know the drill.... just wondering here.

As mentioned, if the conductors the EGC's serve have splices, you should bond the boxes.

Just a reminder: while attaching an EGC to a device may be optional, bonding the box isn't.

 

[celtic]

They come that way? Never seen it, but I guess it can be spec'ed.

You can get them w/not only a screw - but also the bonding jumper attached to said screw .

 

[tryinghard]

Using what conductor, exactly?

The white wire