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Post by Electrical Code Academy Staff on Apr 26, 2016 14:50:22 GMT -6
Now I will give you a hint : check out 250.24(A)(1) and (A)(4) and tell me what you thing based on what you see here only....not assuming anything otherwise. Here is the commentary from the inspector on what they saw:
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tim
New Member
Posts: 2
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Post by tim on May 13, 2016 15:04:28 GMT -6
Assuming the inspector's description of the two coppers is correct...the grounding electrode conductor is permitted to be connected to the equipment grounding terminal, bar, or bus to which the main bonding jumper is connected. In this case, the grounding electrode conductor is connected to the enclosure, and the enclosure is acting as the bonding jumper between the GEC and the grounded conductor bus.
In my experience, it's an odd arrangement, because the GEC isn't connected to a bus. It's my understanding the proscription against relying on the enclosure to be the bonding jumper is there to allow grounded conductors to be placed on either the neutral bus or the grounding bus in the service. I'm going out on a limb and guessing this is compliant because there is no grounding bus, so neutrals can't be connected, and therefore there is no neutral path through the enclosure.
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Post by Electrical Code Academy Staff on May 18, 2016 8:28:59 GMT -6
Greetings Tim,
Welcome to the forum.....
Firstly, since this is indeed a service the issue is that their is indeed a Grounded/Neutral conductor terminal available and would simply take some reworking to be actually compliant.
Here is what 250.24(A)(1) says (and is very commonly done wrong BTW)
250.24 Grounding Service-Supplied Alternating-Current Systems. (A) System Grounding Connections. A premises wiring system supplied by a grounded ac service shall have a grounding electrode conductor connected to the grounded service conductor, at each service, in accordance with 250.24(A)(1) through (A)(5).
(1) General. The grounding electrode conductor connection shall be made at any accessible point from the load end of the overhead service conductors, service drop, underground service conductors, or service lateral to, including the terminal or bus to which the grounded service conductor is connected at the service disconnecting means.
Now, since this is indeed a service this must take place by connecting the GEC to the Grounded/Neutral Conductor and it does not happen in this image based on the inspectors information. Now, if he would just swap the two bare CU conductors then he would be compliant on that aspect so it is a simple fix on that end and I beileve the inspector even tells him how to correct the issue in their actual statement.
Now on to the statement the inspector makes about the "Intersystem Bonding" Terminal. Since the bare CU that he is speaking about is to bond the "other metal piping" it is not permitted to make the recommended connection to the "Intersystem Bonding Terminal" because they are evaluated and designed for communication systems interconnections only and not for just ANY bonding need due to their listings. That is also evident in Article 100 for the definition of "Intersystem Bonding Termination" and the additional language of Section 250.94 which explains how those systems and conductors are to be interconnected.
Now I can tell you many states get this line BLURRED.....Texas being one of them. I sit on the North Texas Advisory Board and they STILL don't get what those devices are designed to do. Yes, they are terminals like any other but they require evaluation and listings to meet their expected intent.
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