Shielded cables for 4160V motor feeders

[kal]

Are shielded conductors (single & multi-conductor) required for feeders to 4160V motors?
Cable manufacturers are saying that shielded cables/conductors are required per NEC 2005. NEC2005 indicates no changes to article 310.6 for shield requirements for cables > 2kV.

Thanks

 

[don_resqcapt19]

Re: Shielded cables for 4160V motor feeders

Look at the change in the exception. The main rule in both 2002 and 2005 says that you must use shielded above 2000 volts. The exception in 2002 premitted non-shielded up to 8000 volts, the exception in 2005 is only up to 2400 volts.
Don