Bonding Wedge

[Marty Funkhauser]

Can someone please post a picture of an installed bonding wedge. I did an image search but could not find it. Thank You

 

[LarryFine]

Well, if you know what one is, and where you'd install it, you can see it looks like an installed bonding locknut or bushing.

 

[augie47]

They don't seem to be very common. The only times I've seen one is when someone forgot to use a bond bushing or grounding locknut. Now that there are "split" bomnding bushings for after the fact installs, the wedges have been even less common.

 

[Marty Funkhauser]

Well, if you know what one is, and where you'd install it, you can see it looks like an installed bonding locknut or bushing.

View attachment 2555911 View attachment 2555912

Thank You

 

[electrofelon]

There is also a picture of one in the handbook, exhibit 250.39.

I'm not really clear in how they work. Do you use it instead of a locknut and use between a box and a metal bushing? Do you put a lug on it?

 

[LarryFine]

I'm not really clear in how they work. Do you use it instead of a locknut and use between a box and a metal bushing? Do you put a lug on it?

It gets wedged ( ) between the locknut and the enclosure. It was made so it could be added to existing installations without having to disturb the conductors.

As Augie said, split binding bushings have made them less important, but there may be times when a bushing is already in place, requiring something thinner .

 

[infinity]

There is also a picture of one in the handbook, exhibit 250.39.

I'm not really clear in how they work. Do you use it instead of a locknut and use between a box and a metal bushing? Do you put a lug on it?

You use it underneath locknut works like a bonding locknut. If there are concentric or eccentric KO's you would add a lug to it like a bonding bushing.

 

[LarryFine]

You use it underneath locknut works like a bonding locknut. If there are concentric or eccentric KO's you would add a lug to it like a bonding bushing.

I've been under the impression it's always used with a lug and jumper.

 

[Marty Funkhauser]

I've been under the impression it's always used with a lug and jumper.

Is that what the screws are for?

 

[LarryFine]

Is that what the screws are for?

Yes, depending on what you get. Usually, one is for biting into the conduit, the other for a lug, as in the second picture above.

 

[infinity]

I've been under the impression it's always used with a lug and jumper.

According to T&B you can use an additional lug where required. I was under the impression that if you had a full size KO no jumper.

 

[electrofelon]

I question the efficacy of some of these things, particularly bonding locknuts. Last time I used one I was not impressed at all. My local supply house has these extra thick locknuts, and I would take one of those made up nice and tight over that bonding locknut any day. I havnt ever used a bonding wedge.