250.68 Accesibility

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lav

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In article 250.68(a) they say that:

"all mechanical elements used to terminate a grounding electrode conductor or bonding jumper to a grounding elecrtode shall be accessible"

but read exception #1 it says

"an encased or buried connection to a concrete-encased, driven, or buried grounding electrode shall not be reuired to be accessible"

It seems like it contradicts itself and what is the difereence? does it have to be accessible or when does it not have to be accessible?

Thanks,

John
 
lav said:
It seems like it contradicts itself and what is the difference? does it have to be accessible or when does it not have to be accessible?
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John, the connections must be accessible, unless it would be imposable to be exposed as in the connection that is encased in concrete.

In my area the electrical inspector has to look at that connection and sign off on it before the cement can be poured.

There is a similar exception for ground rod connections.
 
lav said:
In article 250.68(a) they say that:

"all mechanical elements used to terminate a grounding electrode conductor or bonding jumper to a grounding elecrtode shall be accessible"

but read exception #1 it says

"an encased or buried connection to a concrete-encased, driven, or buried grounding electrode shall not be reuired to be accessible"

It seems like it contradicts itself and what is the difereence? does it have to be accessible or when does it not have to be accessible?

Thanks,

John
Click to expand...


Hi John,

In part, 250.68(A) may be mainly referring to in the instance of bonding to a water pipe electrode. The pipe electrode bond must be within 5' of the foundation exit and some times accessibility for inspection becomes an issue. The water pipe electrode connection does not usually carry a pre-inspection requirement as in the encased bond situation. Inspectors like to work 'clean'. (no crawling around) :) rbj
 
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