Main panel grounding

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mdshunk said:
Of course not. They're supplied with thread forming screws that grab a lot of material in the swaged holes in the back panel. When I add a lug, I have a little cone shaped stone that I chuck up in the cordless drill.
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I always drill and tap a hole for a add on lug, I was just wondering what your honest opinion of the difference was thats all...
 
Does anyone have a problem with landing a GEC on the panel can and not the neutral bar?
 
location?

location?

Trying to recall now, so if you have your connection from your ground rod, shouldent the conductor land on the neutral bar within the first panel board as this if you first means of disconnect. from the meter into the panel in the house you would have your two conductors (hot) and neutral conductor landed on the neutral connection that is then connected via the supplied bonding screw to the panel and the ground from the ground rod to the associated neutral bar? why would you install it at the meter since that is not the disconnecting means?
 
infinity said:
Does anyone have a problem with landing a GEC on the panel can and not the neutral bar?
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Rob, I agree and your answer in post # 9 was correct.

Roger
 
stickboy1375 said:
Interesting... So basically those self tapping screws that come with ground bars use the blow out of the panel for extra strength?
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It's just a personal thing with me, I don't like foot lugs that move when tightening the conductors.

Foot lugs usually have only a single hole at least a 1/4" in them and I like to use the largest bolt that fits. I can't tap a panel to 1/4" or larger so I nut and bolt.

OTOH the ground bar is secured at two places so it the 10-32s seem to work fine.
 
Pierre C Belarge said:
Me too.
See 250.24(A), (A)(1) and (A)(4)
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Key phrase in (A)(1): "...to and including the terminal bus to which the grounded service conductor is connected..."

Key phrase in (A)(4): "...where the MJB specified in 250.28 is a wire or bus-bar...connected to the equipment grounding terminal bar or bus in the service equipment...

This to me eliminates using the can as the connetion between the two conductors. If a MBJ connects directly to a double lug terminating along with the GEC I think that would be OK. But if you have room to install a jumper from the gounded conductor bus to do this, then you cetainly have room for the GEC to land there.
 
What about the reaction from the two metals causing corrosion at the connection. Do you use no-lox at the connection. Bare steel, and brass will corrode vary fast.
 
electricalperson said:
i usually put the GEC inside the metersocket because the kind we buy have a place to put them.
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add me to the list of people who land GEC in the meterbase. poco requires it, there's a place for it, poco supplies 200a millbanks. (they found some 100a milbanks for us during the big ice storm repair, but their official line is that they don't use 100a cans anymore.)

never dremeled any paint off anything. I thread the holes when I'm putting any kind of lug or ground bus anywhere, and use the green screws. I like them a lot. ;)
 
peter52 said:
What about the reaction from the two metals causing corrosion at the connection. Do you use no-lox at the connection. Bare steel, and brass will corrode vary fast.
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Peter, what do you do when you attach a copper conductor to a standard metal device box?

Roger
 
200.2 b Continuity NEC 2008

200.2 b Continuity NEC 2008

shaner said:
In a residential main panel, does the ground conductor from the ground rod have to land on the neutral/ground bar? Or, can it land on an individual lug screwed to the back of the can?

Everything was bonded, but I have just never seen the main ground conductor landed anywhere but on the n/g bar - until today.
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(200.2 b NEC 2008) Is this little change relevant?
 
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