Authorized stock item.
Available from our Customer Service Center.
Aluminum Okopact Conductors
(1) Aluminum Okopact conductors are available on special
order. .
Ampacities
(2) Ampacities are in accordance with Table 310.73 of
the NEC for three single Type MV-90 conductors, or single conductors twisted
together (triplexed) and installed in an isolated conduit in air at an
ambient temperature of 40°C and a conductor temperature of 90°C.
(3) Ampacities are in accordance with Table 310.77 of
the NEC for three single conductors or triplexed cable in one underground
raceway, three feet deep with a conductor temperature of 90°C, 100% Load
Factor, an ambient earth temperature of 20°C, and thermal resistance (RHO)
of 90.
(4) Ampacities based on single Type MV-90 conductors,
or single conductors twisted together (triplexed, quadruplexed, etc.), size
1/0 Awg and larger, installed in uncovered cable tray in accordance with
Section 392.13 of the NEC at an ambient temperature of 40°C and a conductor
temperature rating of 90°C.
In accordance with NEC Section 392.13(B)(1), the ampacities are 75% of
the values given in NEC Table 310.69 (copper conductors). Where the cable
tray is covered for more than six feet with solid unventilated covers, the
ampacities shall not exceed 93% of the values shown above.
Refer to the NEC, IEEE/ICEA-S-135 Power Cable Ampacities, or the Okonite
Engineering Data Bulletin for other ambient temperatures, circuit
configurations or installation requirements.
(5) Recommended size of rigid or nonmetallic conduit
for three conductors based on 40% maximum fill .
*The jam ratio, conduit l.D. to cable O.D. should be
checked to avoid possible jamming.