GEC bonding to enclosure

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A common scenario is a GEC that enters a panelboard or meter can via the 1/4" hole supplied by the manufacturer. The GEC is bare, or it is enclosed in PVC and the PVC is butted up to the meter can without a connector. This is an extremely common installation in my area, one I have done myself many times. Some say a free air GEC must be bonded to the enclosure via a "kenny clamp" device. I say no such rule or requirement exists.
 
mbrooke said:
When a GEC, water bond, ect enters an enclosure, is it required to be bonded at the point of entry?
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Forgetting what we think the NEC requires tell us why based on your engineering skills there may be a choke on a GEC through the bottom of an enclosure (maybe an 1/8") and the actual choke (or maybe Lenz law effect) of the same GEC through a ferrous metal "tube".

Roger
 
electrofelon said:
What exactly is this "enclosure" you speak of? 250.64(E)(1) requires it, however I am not sure the intent is to require bonding the a cabinet as it enters. I think there was another thread on this very recently.
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Meter can, main disconnect, electrical load center- the usual.
 
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