Kenny Clamp

[tom baker]

A question came up on what a fitting is shown in Mike Holts graphics
http://forums.mikeholt.com/showthread.php?t=84507
I emailed the manufacturer for more information, here is a fact sheet they sent me:
M & W Electric Mfg Co LLC

The Kenny Clamp, grounding and bonding connector, bonds the grounding electrode conductor to panelboards, switchboards, cutout boxes, metallic conduit, boxes and transformer enclosures.

• 110.3(B) Installation and Use
Listed and Labeled for the application

• 110.12 Mechanical Execution of Work
Meets the requirements for closing of unused openings in
enclosures.

• 110.14 Electrical Connections
Kenny Clamp? is listed for copper conductors for grounding and
bonding, other connectors not meeting the standard ((ROMEX) that
are used are not listed for grounding and have dissimilar metals.

• 250.4(A)(1) Electrical systems that are grounded shall be connected to earth in a manner that will limited the voltage imposed by lightning, line surges, or unintentional contact with higher-voltage lines and that will stabilize the voltage to the earth during normal operation. ( Listed Fittings will limit sideflash NFPA 780 Lightning Protection)

• 250.8 Connection of Grounding and Bonding Equipment
Grounding and bonding conductors are required to be installed
with a listed fitting.

• 250.64(B) Securing and Protection from Physical Damage
Provides proper strain relief required by the UL/ANSI Standards
UL 467 Grounding and Bonding and UL 486A for Connectors, see
Annex A, NEC.

• 250.64(E) Enclosures for Grounding Electrode Conductors
Using a rigid coupling and a Kenny clamp?, one can bond both ends
of a raceway without bending the conductor through a lug
connected to a bond bushing.

• 300.15 Boxes, Conduit Bodies, or Fittings – Where Required
Fittings and conductors shall be used for the specific wiring
method for which they are designed.

• 312.5(A) Openings to Be Closed. Openings through which conductors enter cabinets, cutout boxes and meter enclosures shall be adequately closed.

986 Salem Parkway – Salem OH 44460 – Phone 330-332-9553
Fax 330-332-4681 – www.mwelectricmfg.com

 

[mdshunk]

• 250.64(E) Enclosures for Grounding Electrode Conductors
Using a rigid coupling and a Kenny clamp?, one can bond both ends
of a raceway without bending the conductor through a lug
connected to a bond bushing.

I wonder how the Kenny clamp is listed in the UL General Guide? I wonder if it's even listed for such a use? I believe that it might work fine for that purpose, but I'm worried that this may be duty for which it has not been investigated. Several of the other proposed uses cause me the same worry.

I don't intend to poo-poo the Kenny clamp, because I use it myself. I think it makes for a nice finished appearance, and no other reason.

 

[don_resqcapt19]

Tom,
I see nothing in that list of code sections that could result in a red tag if you just run the GEC through a small hole in the bottom of the enclosure. Just another example of a manufacture trying to create sales by misusing the NEC rules.
Don

 

[electricmanscott]

Tom,
Just another example of a manufacture trying to create sales by misusing the NEC rules.
Don

I agree. Of course this only applies when they are not too busy trying to create sales by changing the NEC rules.

 

[A/A Fuel GTX]

I just use a 1/2" Romex connector and it does the same thing as the Kenny Clamp and I'll bet at a fraction of the cost.

 

[stickboy1375]

I also just use a 1/2" romex connector...