Electric Panels, Ancient And Not So Old?

I have a grounding question.  I am installing 400a service to my new home.  We ran 350MCM wire underground thru 3" conduit from the 2ndary terminal (moped) to the house into a 320A Cooper B-Line meter.  From the meter we ran 2 sets of 4/0-4/0-2/0 thru the wall to 2-200a breaker panels ("standard practice", according to my electrical supplier).  The ground wire (#4Cu bare) from the grounding rods comes up from the ground and we're curious if there has to be a special splice connecting the ground wire to each breaker panel or can we run thru one breaker panel to then next, say by connecting the ground wire to a ground bus on one panel and running that thru to the next with #4Cu bare or #6Cu in conductor.  Different electricians are suggesting different methods and the electrical inspector is unsure, but seems to be leaning towards the "special splice". Any feedback would be appreciated.
      

I had posted a week or so ago about random afci's tripping aroung my house that is a year old. I am fairly convinced that it's a interference problem or something in my ground system. Outside my house there is a meter and next to it is a small breaker panel with a 200a breaker that feeds the panel downstairs. Outside there are 2 big black wires going to the ground bus. They go inside and one goes to the water pipe that comes in from outside. O can see where the other one goes. Is it important for me to put in a ground rod and run a big wire to the outside box? My las two new houses had them. I'll try to upload a pic of the outside box. Thanks
      

Hey guys,

we have a 4-plex in San Diego that we bought several months ago that was built in 1950. According to inspector's report, we needed electrical upgrades. One of the electricians told us city is under a project to underground all the electrical lines, and if we do not do upgrades the way city EXPECTS us, once our neighborhood is due for undergounding, we will have to REDO the whole thing again (like changing the location of the MAIN electrical panel from where it is now).

Can they FORCE these upgrades to the owners? I am talking about a 15000-20000$ that will be required... It is not cheap...



What we wanted to do is the very minimum, but to make sure our tenants are safe: just replace fuses in each unit with BREAKERS and leave it in the closets as we "grandfathered" them in and replace the main panel fuse with a breaker.

But according to the advise of an electrician based on the city undergrounding requirements, we will have to RELOCATE the fuses from closets to the OUTSIDE of the building AND RELOCATE the main panel from where it is now to an opposite direction (closer to the main street).

Can the city ENFORCE us to do this?
      

Appreciate any help with this.



Background:



- new to us old house, got three quotes for an upgrade to 200A service plus addition of three new circuits in conduit with receptacles (Chicago area, conduit is code in just about every town around, I have no issue with that);



- existing service to house was overhead, opted to keep it overhead and not bury it;



- the quote says, exactly: "Installation of a 200 amp 240 volt overhead electric service complete with riser, outdoor meter socket with a 200 amp disconnect, 40 position circuit breaker type distribution panel..." etc.;



I understood from discussing the work with the contractor we chose that install overhead service meant to include the work and materials needed to upgrade the line coming from the pole at the alley to the house to handle 200A capacity; paid 50% down on quote;



- the morning the boss and tech show up for the work, boss says we already have a 200A overhead, which I seem to recall the home inspector mentioning months ago before the closing (makes sense because the overhead runs to a single room addition put on several years ago), but boss was the guy who came to the house to quote the job in the first place, didn't mention anything about the existing overhead capacity at the time;



- the work gets done, seems fine; tech left without going over anything with us but whatever.



Final bill matches the quote to the dollar. There is no indication that there were any surprises during the work.



Since the quote says installation of overhead service and they didn't need to replace the overhead lines from the pole I think the final bill should be lower than the quote. The distance from the pole to the riser is about 40 feet.



Should I expect from the wording in the quote that the final bill should be lower than the quote because they didn't have to touch the existing overhead?



About how much lower?



We didn't go with the lowest quote, didn't beat him up on price and the total bill is quite a pretty penny, so I think he would be making good money either way.



I know there is no way for someone to tell me an exact dollar figure here based on a blog post, but I'd like to get some kind of idea so I can start my conversation about the final bill.



Thanks for any help out there.
      

I have new 12/2 wire running to my attic (home built 1920) on a 20amp breaker.  My service is 100A and the box is older but not ancient.  The only thing on the line is a couple of outlets and 2 lights.  Would it be code to switch this breaker out for a tandem 15amp breaker?  This would open some space for me as my box is full.  Thanks.
      

I am installing a square D 100 amp panel in a mobel home and had a question. The panel came with no seperate grounding bar only 2 connected neutrel bars and the typical hot bars. I was curious as to why some panels have seperate grounding bars (for bare copper) attached to them an some do not. Thier was a green bonding screw that said if bonding the box was necessary to screw it in the nuetrel bar and attach a wire from it to the panel box. Would it be better to attach a grounding bar directly to the panel and run a wire from it to a rod in the ground?
      

Hello All,



First post, working on a complete bare-stud remodel of my home, so I will try to be descriptive enough.  I have a 150 Amp service to the house (which I might upgrade later) with a meter socket and breakers outside.  I am running into the house (more than 10') to a 125 Amp 20 space ML.  I have too many 15 and 20 Amp circuits now for the panel and need to change it out.  The house is rather sprawling, so the rather than tie rooms together in a confusing way, I broke the circuits down per minimum requirements... almost none of them are near capacity.  I am going to run the big stuff back out to the exterior panel/service however I still need more space in my interior panel.  What I REALLY need is just a 40 circuit 125 Amp GE panel but I don't think those exist because (guessing) *most* 40 circuit scenarios need more amps.



What I wanted to do was upgrade to a 40 space panel (only been able to find a 200-Amp).  I realize I am still limited outside by the service and have already run 4/0 aluminum.  I know I am not going to go anywhere near the 200 Amp capacity, I just need the space.  Is this ok?  Any reason I shouldn't use a 200 Amp MB panel? 



Thanks!
      

I am having my inground pool renovated. The pool is made from aluminum panels. They will be replacing about 5 panels with steel and the contractor said they need to be grounded. Now I have checked the rest of the panels and there is no evidence of any grounding that I can see. The only thing I have found is at the end of the pool they will be repairing there was some wire connected to the top railing and buried into the dirt.

I have worked with electrical contractors when I was younger and do electrical work at the power plant I work at.

How would I ground these walls and what materials do I need.
      

We need to have a new water line put in from the meter in the parking strip to the house. We've recently had a new electrical panel put in and the electricians pounded two grounding rods into the ground outside our house. Because of this, will the house be just as well grounded if we get plastic pipe as if we get metal?
      

Hello! Great help here. I did a search and could not find a solution to my problem so I had to make a new thread.



I just purchased this house and it is a bit of a fixer upper. one side of the house has no power. This looks to be a sub panel? and it is on the side of the house with no power. I was wondering if anybody could help with the wiring of this panel? The main box is just on the outside of this box.







This looks like an old box and I can not see where to wire the ground/common wires. There are 2 bars under the breakers and both have a black wire connected to them.