the applicable standards.
2.1.5.1
Jacket Material
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NOTE: Modify the restriction against PVC Jackets if
they will be permitted on metal-clad cables, in
accordance with paragraph METAL-CLAD CABLE,
subparagraph JACKETS.
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The jacket shall be one of the materials listed below. [Polyvinyl chloride
compounds will not be permitted.] [Variations from the materials required
below will be permitted only if approved for each specific use, upon
submittal of sufficient data to prove that they exceed all specified
requirements for the particular application.]
a.
General Use
(1)
Heavy-duty black neoprene (NEMA WC 70).
(2)
Heavy-duty chlorosulfonated polyethylene (NEMA WC 70).
(3) Heavy-duty cross-linked (thermoset) chlorinated polyethylene (
NEMA WC 70).
b. Accessible Use Only, 2,000 Volts or Less - Cables installed where
they are entirely accessible, such as cable trays and raceways with
removable covers, or where they pass through less than 3 meters 10 feet
of exposed conduit only, shall have jackets of one of the materials
specified in above paragraph GENERAL USE, or the jackets may be of one
of the following:
(1)
General-purpose neoprene (NEMA WC 70).
(2)
Black polyethylene (NEMA WC 70).
(3)
Thermoplastic chlorinated polyethylene (NEMA WC 70).
2.1.5.2
Jacket Thickness
The minimum thickness of the jackets at any point shall be not less than 80
percent of the respective nominal thicknesses specified below.
a. Multiple-Conductor Cables - Thickness of the jackets of the
individual conductors of multiple-conductor cables shall be as required
by NEMA WC 70, and shall be in addition to the conductor insulation
thickness required by Column B of Table 3-1 of the applicable NEMA
publication for the insulation used. Thickness of the outer jackets or
sheaths of the assembled multiple-conductor cables shall be as required
by NEMA WC 70.
b. Single-Conductor Cables - Single-conductor cables, if nonshielded,
shall have a jacket thickness as specified in NEMA WC 70. If shielded,
the jacket thickness shall be in accordance with the requirements of
NEMA WC 70.
SECTION 16120A
Page 14
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