Barriers required?

[wlaricci]

What if any code violations are present? I have never seen grounding electrode conductors routed through a box like this. Also, wouldn't bonding bushings be required? Not sure what the low voltage cables are, maybe power logic.

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[LarryFine]

Yes, bonding bushings should be there.

 

[infinity]

Yes, bonding bushings should be there.

I was thinking about this and at first agreed but I was thinking what would section require the use of bonding bushing? The GEC is passing through the box, the requirement is that the raceway or enclosure create a "parallel path". If the raceway is bonded to the GEC at each end wouldn't the connectors and locknuts attached to the metal box create a parallel path? What if the box were a conduit body or had hubs?

250.64(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 to create an electrically parallel path. Nonferrous metal raceways and enclosures shall not be required to be electrically continuous.

 

[LarryFine]

Your excerpt clearly states "Ferrous metal raceways and enclosures shall be bonded at each end of the raceway or enclosure to the grounding electrode or grounding electrode conductor . . . " which means both ends of every raceway section. A conduit body or other hubbed enclosure would not be seen as an interruption of the raceway.

 

[wwhitney]

Your excerpt clearly states "Ferrous metal raceways and enclosures shall be bonded at each end of the raceway or enclosure to the grounding electrode or grounding electrode conductor . . . " which means both ends of every raceway section.

Or you could read it as "shall be bonded at each end of the (raceway or enclosure)" meaning that if you have a series of raceways and enclosures, you have to bond it at each end of the series.

Cheers, Wayne

 

[don_resqcapt19]

I was thinking about this and at first agreed but I was thinking what would section require the use of bonding bushing? The GEC is passing through the box, the requirement is that the raceway or enclosure create a "parallel path". If the raceway is bonded to the GEC at each end wouldn't the connectors and locknuts attached to the metal box create a parallel path? What if the box were a conduit body or had hubs?

I agree with that interpretation. There is only an issue where the ferrous metal is not electrically continuous from end to end. The metal enclosure will make it electrically continuous.

 

[paulengr]

I agree with that interpretation. There is only an issue where the ferrous metal is not electrically continuous from end to end. The metal enclosure will make it electrically continuous.

To follow up I was taught that you put the conduit lock nuts in with the “teeth” towards the box and tighten until the teeth gouge into the metal through the paint/oxide. This bonds the conduit to the box. So everything meets the continuous criteria. Grounding bushings are required on nonmetallic boxes because...they are nonmetallic. On a metallic box you use a plastic bushing instead to protect against chafing or use a connector that has the bushing built in like a Myers hub.

 

[infinity]

I agree with that interpretation. There is only an issue where the ferrous metal is not electrically continuous from end to end. The metal enclosure will make it electrically continuous.

I believe that the "electrically continuous" wording was added a few code cycles ago to clarify that bonding bushings weren't required. IMO this section is still horribly written.

 

[rnatalie]

I'd check the insulation rating on that blue stuff. It needs to be rated above the maximum voltage present in the box.

 

[hbiss]

I'd check the insulation rating on that blue stuff. It needs to be rated above the maximum voltage present in the box.

Looks like CAT5 to me. Yup, needs a barrier and bonding bushings on the grounding conductor EMT connectors. The CAT5 can be on the side with the grounds.

-Hal

 

[don_resqcapt19]

I believe that the "electrically continuous" wording was added a few code cycles ago to clarify that bonding bushings weren't required. IMO this section is still horribly written.

You have a few days left to submit a PI to fix it...PI submission closes at 5pm eastern time on Thursday.