Brand new panel questions

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tonype

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New panel (last month) - 1960's home. Had AHJ sticker of "Approval". However, I have some ????

1. 3 bare grounding conductors to one terminal bar screw - thought this was limited to 2 (got this from a Mike Holt diagram reference I saw on line).
2. Are mouse ears too tight radius? From a previous thread, I also thought that these, in general, are undesirable.
3. Sharing of the 2 terminal bars - grounded conductors and bare grounding conductors both on each bar.

http://i15.photobucket.com/albums/a352/TonyPE/IMGP3789_edited-1.jpg

Thanks.
 
tonype said:
New panel (last month) - 1960's home. Had AHJ sticker of "Approval". However, I have some ????

1. 3 bare grounding conductors to one terminal bar screw - thought this was limited to 2 (got this from a Mike Holt diagram reference I saw on line). .
Click to expand...
Code compliant as long as the mfg instructions allow.
tonype said:
2. Are mouse ears too tight radius? From a previous thread, I also thought that these, in general, are undesirable. .
Click to expand...
I know of no violation
tonype said:
3. Sharing of the 2 terminal bars - grounded conductors and bare grounding conductors both on each bar.

http://i15.photobucket.com/albums/a352/TonyPE/IMGP3789_edited-1.jpg

Thanks.
Click to expand...
Looks o.k as long as it's a service panel and not a sub-panel. (It appears to have a grounding electrode conductor, so I'm assuming "servcie panel")
 
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tonype said:
2. Are mouse ears too tight radius? From a previous thread, I also thought that these, in general, are undesirable.
Click to expand...
I have never seen a minimum bending radius for individual power conductors 600V or less. If there was, you would not be able to use most condulets, like LB's.

Many people confuse wire space at terminations as being a minimum radius. There are also several locations that list minimum separation distances, like for pull box sizing, but again these are not minimum radii.
 
tonype said:
1. 3 bare grounding conductors to one terminal bar screw - thought this was limited to 2 (got this from a Mike Holt diagram reference I saw on line).
Click to expand...


That depends on the manufacturer's instructions. However, in this case, it is a violation. SquareD QO only allows 2 EGCs in 1 screw.
 
I have never seen a minimum bending radius for individual power conductors 600V or less. If there was, you would not be able to use most condulets, like LB's.

Many people confuse wire space at terminations as being a minimum radius. There are also several locations that list minimum separation distances, like for pull box sizing, but again these are not minimum radii.
Click to expand...

So am assuming that until it's written in black and white in the NEC that the rules of 312.6, and 314.28 were wrote to protect conductors #4 and greater, by defacto?

Also, the bending radii of cables seems to be listed at xxx.24. Thought this was part of trying to protect conductors too (without a name call out).

I know you can't legislate common sense, but without re-writing the whole 300's how else is the code to protect conductors against the acts of the untrained, (who seem to survive on rumors of what is inside the NEC) what might be in the pipeline as far as 110.3(B) for conductor protection?
 
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