Load center ground bar in jbox

[infinity]

So you didn't think it may be where it is due to the run of EMT already approaching 360? of bends?

It could be 10 other things too. Without a wider shot photo of what's really going on we're just guessing, not that there's anything wrong with that.

 

[Dennis Alwon]

I had thought a similar thing that PVC may cut off on a sharp edged K.O in a metal box,(I've seen it happen before) but NM in a metal 2 screw connector would not.

Who said you had to use metal connectors. Some of the pop in style connectors are plastic and have a lip that extends in the box.

I believe the box is not intended to be used for grounding but rather that the Emt grounds the box. I cannot understand why else there would be no grounding provision.

I went to the basement to see if I had an old box down there but no luck. If I remember I will check it out tomorrow.

 

[jeremysterling]

Some boxes do come with a place for a grounding screw. However, not all boxes do come with a place for a grounding screw. Now I am not sure what they were thinking when they don't even put a place for the grounding screw. I can't say I would go through the trouble to produce a jbox with no provision for bonding.

When I'm training an apprentice to make terminations, I stress making the bonding connections first. This is not for safety or lack of safety (as some electricians feel safer working when metal is not bonded). It is because it is generally the most difficult termination to make. This difficulty arises because while roughing in boxes, bonding provisions are not made when easiest to do so. I'm no saint, but I try. If I had a 12X12 screw cover j-box to mount and had a panel enclosure ground bar, 8-32 screws with nuts and washers, I'll put it in. Here I am, on the ground, with the j-box on my tailgate or stack of drywall, drilling mounting holes, KO holes, drain holes, phenolic tag holes, holes for DIN rail, etc. but never drill even one quarter inch hole for a mechanical lug to bond the box! No, that hole does not get made until the box is 20' in the air mounted sideways and pulled full of wire at least 10 of them green.

So the electrician climbs the ladder to make up the box. He has his strippers and nail apron full of wirenuts and 1 or 2 mechanical lugs and 1 or 2 1/4"-20X1" combo-head screws and nuts. He looks for a lug in the box, nope. He looks for hole in the box to mount a lug, nope. Critical point, do you climb down, fetch the drill and bit OR make up the box put the cover on and make a mental note to come back with the drill later when your not so busy hot checking everything. Make the bond first, make the provisional hole for bond (a couple of them even) first. It ensures that it gets done.

 

[cadpoint]

Who said you had to use metal connectors.
...

There is a Code Article stating the establishment of a continual mechanical connection with the application of electrical service.

If I missed the jest, well I've been father left before...

 

[Dennis Alwon]

There is a Code Article stating the establishment of a continual mechanical connection with the application of electrical service.

If I missed the jest, well I've been father left before...

Jude, I was referring to nm plastic connectors. :smile:

 

[ptonsparky]

Just don't put the bar on the bottom of a 3R enclosure. They end up rusting. Sides or back, add the nut and scrape the paint on the inside. This is way better than a blue wire connector maxed out with 10s, 12s, 14s or 8s. I agree with the CH bars and 10-32 screws.

 

[vacili]

you mean like this - and as for nm - dont run it thru the box and you will have no worries

wire fill in conduits just way over derating .......................imrolf

 

[e57]

This may not make much sense - but it is my understanding that panel enclusures are listed with certain ground bars in mind - but regular box enclosures are not, and could use any suitable ground bar, lug or terminal - AND.... "shall be spliced or joined within the box or to the box with devices suitable for the use"

'Suitable' is pretty open to interpetation.... 250 leaves anything short of a sheet-metal screw or solder as acceptable

As for the picture posted - no word about the extention cord? Or the 12/2NM coming in the front - or did everyone miss that?

 

[iwire]

As for the picture posted - no word about the extention cord?

It looks like orange 3 wire NM to me.

 

[LarryFine]

My response is: yes, I've done it, with whatever strip suits the number of conductors I need to land.

I always remove unused bars from panels I install.