Grounding a Transformer

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rancho5000

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Good morning all,

Please look at the attached picture. I'd like to hear your feedback on the way the ground wire was brought through the grating at the bottom of the transformer.
 

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To me, the entry through the grate is not of great concern. Whether the routing after leaving the transformer meets 250.64(B) is questionable.
I have not researched but I have been advised that the listing on that type transformer does not allow grounding connections on the ventilated base plate.
 
MattS87 said:
Also see 450.10 "shall not be installed on or over any vented portion of the enclosure"
Click to expand...

450.10 Grounding.

(A) Dry-Type Transformer . Ellclosures. Where separate equipment grounding conductors and supply-side bonding jumpers are instaJIed, a tenhinal· bar for alL grounding. and bonding conductor connections shall be secured inside the transformer enclosure. The terminal bar sha.ll be bonded to the enclosure in accordance· with 250.12 and shall not be installed on or over any· vented portion of the. enclosure.
Click to expand...

I do not see anything there preventing bringing the GEC through the vents.
 
iwire said:
I do not see anything there preventing bringing the GEC through the vents.
Click to expand...

I can't see the picture clearly. Just used 450.10 to say if the ground terminal was covering the vents it would be in violation. I have installed a ground through the bottom vent and did not have it fail even with an inspector who is very picky with grounding/bonding.
 
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