NEC Single conductor unsheilded cable

[tulum]

What is the scoop on 5kV single conductor unsheilded cable in the US?

I heard that the NEC is derating the use of the cable to 2.4kV. Has this already taken place?

I am in Canada and I am having trouble purchasing 2/0 5kV single conductor unsheilded cable...never had a problem before...

Regards,
TULUM

 

[TestBeforeTouch]

NEC Article 310.6 now prohibits, in most cases, the use of unshielded cable above 2300 volts. The primary reason is safety. At 4160 volts an unshielded cable may carry a surface charge that could be dangerous.