So Peter, space you saying that in between the meter and also the main Disconnect you have 1/0? If so, that would certainly be too little (2/0 Copper or 4/0 Aluminum----typically). Some times I check out this where you have a 200 amp panel v a 200 amp disconnect yet it is a Remote distribution Panel with the “proper” size disconnect located at the Meter.

You are watching: What size copper wire for 200 amp service entrance


Yes, the is my question, and also I see it on residence that were built in the 1990s.

I never see it after 2000.


I checked all to it is in sure


I thought it might be beneficial to plop down a copy that Table 310.15(B)(6) indigenous the NEC. This is the table the lists what gauge of conductor that copper and aluminium corresponds with what dimension residential service. Probably you currently have this stuff, but here it goes anyhow:

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In the instance of this thread, if you check out a 1/0 copper terminated on a business overcurrent protection maker greater than 175 amps, you have actually a difficulty on her hands.

If that 1/0 copper has some various other protective device at it’s beginning end, rated 175 amps or less, then it’s okay. In that case, the 200 amp breaker would be nothing much more than a disconnect that additionally happens to be a 200 amp breaker.

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even far better answer…can 1/0 be because that 200A…simple answer is NO…because if it is SE ( no SER ) it would certainly not have actually a disconnect ahead of it…unless they just SCREWED it every up…

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Marc_D.Shunk (Marc D. Shunk) April 21, 2007, 2:57am #8
pabernathy:

…because if it is SE ( no SER ) it would not have actually a disconnect front of it…

SE is the general course of cable, which contains many cable types such as SEU, SER, and also SEA.


Yeah however I think the is talk about an easy SE…(3 conductors ) and also not 4 together in remote circulation panel…could be wrong however


rcooke (Roy D. Cooke, Sr) April 21, 2007, 7:18am #10
pabernathy:

even far better answer…can 1/0 be because that 200A…simple price is NO…because if it is SE ( no SER ) it would certainly not have a disconnect ahead of it…unless they simply SCREWED it every up…

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phughes:

Is it acceptable to have 1/0 wire SE on a 200 amp entry breaker?

In my area house inspectors have actually no service checking the size of wire.This is past the scope of a house inspector .I wonder why a residence inspector would even be probing in a ar of the service to look in ~ the cables .This organization was initially inspected and also passed because that usage.Really why should I be doughting the initial installation.Where go this stop .I carry out a intuitive inspection that all all set accesssable parts of the residence .The same I carry out not take it an wait conditioner apart to check out if the AC mechanic has actually installed the correctly example did he use the correct solder lead or silver.The very same I perform not examine to watch if the plumber supplied lead solder or lead free solder.As a house Inspector ns feel this is not my job and also I perform not inspect the dimension of feeders in a service.Roy Cooke


fcarrio (Frank M. Carrio, CMI) April 21, 2007, 9:47am #11
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rcooke:

In my area home inspectors have no organization checking the size of wire.This is past the border of a home inspector .I wonder why a house inspector would also be research ***in a section of the company ***to look in ~ the cables .This service was initially inspected and also passed for usage.Really why should I be doughting the original installation.Where walk this stop .I carry out a intuitive inspection the all all set accesssable parts of the home .The exact same I do not take it an air conditioner personally to check out if the AC mechanic has installed that correctly example did he usage the exactly solder lead or silver.The same I execute not inspect to check out if the plumber provided lead solder or lead complimentary solder.As a home Inspector ns feel this is not my job and I execute not check the dimension of feeders in a service.Roy Cooke

You’re joking right?

Are you informing us that you execute not relocate the panel cover to;

look at the circuit breakers and wiring to view **what sort of problem **** lock **are in?To watch if they room any dual tapps?To watch if a smaller sized gauge cable is inserted into a bigger sized circuitbreaker?To check out if they has actually been any type of arcing?To see if there has actually been any water seepage right into the dashboard box?

I can go on and also on, the perform is endless!

I expect I have actually misread your statements and also or miss taken your meaning!


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fcarrio:

You’re joking right?

Are you informing us the you perform not move the dashboard cover to;

look at the circuit breakers and also wiring to see **what type of condition ****they **are in?To check out if they are any twin tapps?To check out if a smaller gauge cable is put into a bigger sized circuitbreaker?To check out if they has actually been any arcing?To see if there has actually been any water seepage into the panel box?

I could go on and also on, the perform is endless!

I hope I have actually misread your statements and also or miss taken your meaning!

Please check out what I said unless our main panels are different then oursthe main breaker is tho covered as soon as the the lower section is opened .No where did I speak about double taps ,circuit breakers,smaller gauge wire,or water seepage …I to be talking around the main feed and nothing else.I again reiterate I carry out not think countless if any home examiners should it is in going into see what size the main feeds are.I hope you have been analysis some that the electrical questions on this BB and you have actually seen how little knowledge countless home inspectors have on electricity.I carry out think I have actually a reasonable electrical knowledge maybe an ext then friend .No i was no joking no a little bit.Those in power in Canada room trying to protect against HIs from also looking in the lower section that the panel.Do you yourself really think all home inspectors space qualified come throughly inspect the main electrical panel???