Kenny clamp? What the ?

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ritelec

ritelec

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Jersey
I was at the supply house a month or two back. The guy at the counter asked if I knew what it was. I didn't. Turns out it is a Kenny clamp or connector to go on the gec as it enters the panel.


Where can I find reference to this clamp and does it just go on the water ground or also the gec to the rods?
Thank you.

Rich
 
ritelec said:
I was at the supply house a month or two back. The guy at the counter asked if I knew what it was. I didn't. Turns out it is a Kenny clamp or connector to go on the gec as it enters the panel.


Where can I find reference to this clamp and does it just go on the water ground or also the gec to the rods?
Thank you.

Rich
Click to expand...

Try this link: http://kennyclamp.com/
 
As far as I know, this is not required per NEC. Or at least it has never come up during any inspections. Maybe a requirement per 2014??
 
edward said:
As far as I know, this is not required per NEC. Or at least it has never come up during any inspections. Maybe a requirement per 2014??
Click to expand...
It may take the place of a separate grounding lug for situations where the ground bar or X0 terminal is not already bonded to the enclosure in a compliant way.
 
Not in the NEC ?

Ok thank you. Rx connector it is.

Yea I did a couple of services last year and no mention of this and all was good with rx connector.

At the supply house a contractor was talking to the counter guy that several towns wanted them ???

Thanks again
 
Thank you for the link.

I'm good with the rx connector right?

There's a neutral ground bar in the panel.

That's how I read it.
 
GoldDigger said:
It may take the place of a separate grounding lug for situations where the ground bar or X0 terminal is not already bonded to the enclosure in a compliant way.
Click to expand...

Without checking the book, I believe the jumper from the XO is sized per 250.122, so will this device be listed to the place of the jumper? I have not checked the listing on it.


To the OP,

The GEC does not need a connector at the panel. The small 1/4" holes at the bottom of the panel are designed for GEC entry.
 
edward said:
Without checking the book, I believe the jumper from the XO is sized per 250.122, so will this device be listed to the place of the jumper? I have not checked the listing on it.


To the OP,

The GEC does not need a connector at the panel. The small 1/4" holes at the bottom of the panel are designed for GEC entry.
Click to expand...

jumper said:
Although commonly used, I do not think a RX/NM connector is listed for a GEC.
Click to expand...

Like edward I have always used the prepunched 1/4" holes for GEC. If I felt the need for a connector I have used Arlingiton's black button.
 
GoldDigger said:
It may take the place of a separate grounding lug for situations where the ground bar or X0 terminal is not already bonded to the enclosure in a compliant way.
Click to expand...

In my opinion that would be a violation of 250.24(A)(1).

The GEC must connect to the grounded conductor or the grounded terminal bar or bus.
 
As far as the Kenny clamp the only thing it will help with is Mr Kenny's bank account.

It's not required by the NEC and I agree with the others that no connector of any type is required by the NEC for a GEC entering an enclosure.
 
iwire said:
As far as the Kenny clamp the only thing it will help with is Mr Kenny's bank account.

It's not required by the NEC and I agree with the others that no connector of any type is required by the NEC for a GEC entering an enclosure.
Click to expand...
250.64 Grounding Electrode Conductor Installation.

...

(E) Raceways and Enclosures for Grounding Electrode
Conductors.

(1) General. Ferrous metal raceways and enclosures for
grounding electrode conductors shall be electrically continuous
from the point of attachment to cabinets or equipment
to the grounding electrode and shall be securely fastened
to the ground clamp or fitting. Ferrous metal
raceways and enclosures shall be bonded at each end of the
raceway or enclosure to the grounding electrode or grounding
electrode conductor. Nonferrous metal raceways and enclosures
shall not be required to be electrically continuous.

(2) Methods. Bonding shall be in compliance with
250.92(B) and ensured by one of the methods in 250.92(B)(2)
through (B)(4).

...
Click to expand...

I don't see an exception to this section.

However, many believe where the GEC is effectively bonded to the enclosure when connected in the panel to the GC/GCB/EGB. In the case of GEC connection to the EGB, it is required that there be a wire-type main/system bonding jumper, sized per Table 250.66.
 
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Smart $ said:

​

I don't see an exception to this section.

However, many believe where the GEC is effectively bonded to the enclosure when connected in the panel to the GC/GCB/EGB. In the case of GEC connection to the EGB, it is required that there be a wire-type main/system bonding jumper, sized per Table 250.66.
Click to expand...
The kenny clamp is not for use with raceways.


Roger
 
Wonder if the kenny clamp would have prevented this.

This is the panel being replaced... King of Kings Square D didn't cut it. ???
 
HOW would have the clamp prevented that?

Was lightning the cause? or just loose connection and corrosion in the panel?
 
iwire said:
As far as the Kenny clamp the only thing it will help with is Mr Kenny's bank account.
Click to expand...
I have to agree with that statement.


from the link in post #2:

The National Electrical Code 2011 Edition now changes the language for 250.8(A) Permitted Methods: Equipment grounding conductors, grounding electrode conductors and bonding jumpers shall be connected by one of the following means: (1) Listed pressure connectors (2) Terminal bars (3) Pressure connectors listed for grounding and bonding equipment (4) Exothermic welding process (5) Machine screw-type fasteners that engage not less than two full threads in the enclosure (6) Thread forming machine screws that engage not less than two threads in the enclosure (7) Connections that are part of a listed assembly (8) Other listed means. The Kenny Clamp already complies with this requirement.

I don't see where this use of this clamp would be required, NEC gives you 7 other methods to connect your conductor, if anything the Kenny Clamp would fall under method #8 - other listed means.

It also goes on saying:

The Kenny Clamp is a UL listed grounding and bonding connector. The Kenny Clamp bonds the enclosure of a service panelboard, load center, separately derived system or switchboard to the grounding electrode conductor, a 250.8 NEC application. The Kenny Clamp fits through a 1/2" knock out or punched hole. There are 10 sizes, each size is fitted with a internal compression fitting sized for the appropriate conductor. When purchasing, you should request the appropriate size based on grounding electrode conductor being used, Table 250.66 NEC identifies the required grounding electrode conductor sizes. UL 67 list bonding screws for residential panelboard at 30 amperes. Don't rely on the bond screw for ground-fault continuity.

The last sentence there is what I question, NEC wants us to rely on the bond screw, otherwise it would require use of other methods:(
 
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