SEO said: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.
II. Overhead Service-Drop Conductors
(A) General. Conductors shall have sufficient ampacity to carry the current for the load as calculated in accordance with Article 220 and shall have adequate mechanical strength.
ron said: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.
ron said: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.
ron said:C3PO,
If it isn't a 1200A main, then why call it a 1200A service?
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:Will the power company hook to parallel condutors. I need the best suggestion on how to procede with this. Thanks
triplex15 said:WIth a 1200amp 120/240v Overhead service they are calling for 3 conduits with 500 mcm up to weather heads. Will the power company hook to parallel condutors. I need the best suggestion on how to procede with this. Thanks
zog said:You will need a GFI on your 1200A main, and need it tested (and witnessed)
zog said:You will need a GFI on your 1200A main, and need it tested (and witnessed)
liar, liar pants on fire!zog said:You will need a GFI on your 1200A main, and need it tested (and witnessed)
mdshunk said:liar, liar pants on fire!
That's for 480 and above.
SEO said: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.
Thinking one thing typed another thanks for the correction.infinity said:I think that you meant GFPE? 230.95