Table 250-122

[mshields]

Does this table apply to 5kV and 15kV systems as well as to "under 600V" systems.

Also, believing the answer to the first question is yes, I've seem the ground specified with a 600V insulation (The rational being that no insulation is needed at all). Do you agree with this practice.

Thanks,

 

[bob]

250.180 seems to cover 1kv and above. See 250.190.

 

[mshields]

Thanks

Thanks

250.180 does indeed cover over 1kV and what I see is that all previous sections apply along with any modifications in 180. Conclusion Table 250.188 applies. Just looking for a sanity check.

Thanks again,

Mike