mshields
Senior Member
- Location
- Boston, MA
A colleague of mine has a 1600A feeder from a 1000kW generator (@480V)protected by a 1600A breaker at the generator. We are informed that the new 2008NEC will require that the switchboard this feeds must have barriered sections for Article 700 loads, 701/702 loads and a separate enclosure for a fire pump OCP if required (which happens to be the case on this project). Problem is that GE, Square D, etc don't make, in switchboard construction a switchboard with full barrier between sections.
This leaves the option of comming to a wire way and tapping in accordance with Article 240. If he does this, does he have to tap each conductor of the 4 conductors in the 1600A feeder OR may he, for example, for a 400A tap, just tap 1 set of conductors?
One manufacturer suggested 3 single section switchboards. But these would not have a common bus and as this is true, we have the same quandry as we have with the wireway to separate devices in NEMA 1 enclosures.
Any thoughts would be appreciated?
Mike
This leaves the option of comming to a wire way and tapping in accordance with Article 240. If he does this, does he have to tap each conductor of the 4 conductors in the 1600A feeder OR may he, for example, for a 400A tap, just tap 1 set of conductors?
One manufacturer suggested 3 single section switchboards. But these would not have a common bus and as this is true, we have the same quandry as we have with the wireway to separate devices in NEMA 1 enclosures.
Any thoughts would be appreciated?
Mike
