Service 1200 amp
- Thread starter triplex15
- Start date
- Status
You will have to check with the powercompany as to their requirements for taps. However 500kcmil thhn copper at 75c is only rated for 380 amps. 380 X 3 = 1140 amps. Can' tgo up to 1200 amps per section 240.4 (C). Conductors have to be equal or greater than the rating of the overcurrent device.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
SEO said:
I am not sure I agree
Last edited:
ron
Senior Member
- Location
- New York, 40.7514,-73.9925
Denis,
If the reference to 1200A service means that there is 1200A overcurrent protection, then 230.90(A) [NEC 2002 handy) says that the wires need to be rated equal or higher than the OCPD.
If the reference to 1200A service means that there is 1200A overcurrent protection, then 230.90(A) [NEC 2002 handy) says that the wires need to be rated equal or higher than the OCPD.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
ron said:
Yeah I realized after I posted and too late to edit that I was may be in error. Where do the service conductors begin in this scenario? Does my quote say that the service drop can be smaller but the riser must be 1200 amp capacity? More confused now then before.
ron
Senior Member
- Location
- New York, 40.7514,-73.9925
C3PO,
If it isn't a 1200A main, then why call it a 1200A service?
BTW, to the OP: They absolutely connect to parallel conductors. They may require you to provide the taps. http://portal.fciconnect.com/portal/page/portal/FcicntPublic/Product_Type?appname=catDisplayByPath$entryPoint=adirect$categoryPath=Division+catalog%2FBurndy
When we do multiple 4000A services for large buildings, they have lots of paralleled conductors them self too.
If it isn't a 1200A main, then why call it a 1200A service?
BTW, to the OP: They absolutely connect to parallel conductors. They may require you to provide the taps. http://portal.fciconnect.com/portal/page/portal/FcicntPublic/Product_Type?appname=catDisplayByPath$entryPoint=adirect$categoryPath=Division+catalog%2FBurndy
When we do multiple 4000A services for large buildings, they have lots of paralleled conductors them self too.
ron
Senior Member
- Location
- New York, 40.7514,-73.9925
C3PO,
I didn't think of it that way. Good point.
I didn't think of it that way. Good point.
mdshunk
Senior Member
- Location
- Right here.
You betcha, but they appreciate the head's up on how many of what gauge you have there. Most of the trucks won't have that many big taps in the bin. If they know ahead of time, they'll bring plenty.triplex15 said:
zog
Senior Member
- Location
- Charlotte, NC
triplex15 said:
You will need a GFI on your 1200A main, and need it tested (and witnessed)
mdshunk
Senior Member
- Location
- Right here.
liar, liar pants on fire!zog said:
That's for 480 and above.
zog
Senior Member
- Location
- Charlotte, NC
mdshunk said:
Oh yeah, missed that part, never worked on anything less than 480 so I tend to not pay attention to that stuff.
If you read triplex15s post all he stated is that he has a 120/240 system that is overhead fed and it is going to be rated for 1200 amps. Everyone seems to assume that it is 3-phase. With the information provided about the only thing that I can say is that he isn't required by the NEC to provide GFIC protection and that he should check with his power company about the taps . Does he have one main or 6 mains? Is it 3 phase delta (being he mentioned 240 volts) or is it single phase? Not enough information.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
SEO said:
I think that you meant GFPE? 230.95
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