sealing compound will surround each individual insulated conductor and the outer jacket.

Exception: Multiconductor cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall be permitted to be considered as a single conductor by sealing the cable in the conduit within 450 mm (18 in.) of the enclosure and the cable end within the enclosure by an approved means to minimize the entrance of gases or vapors and prevent the propagation of flame into the cable core, or by other approved methods. For shielded cables and twisted pair cables, it shall not be required to remove the shielding material or separate the twisted pair.

(3) Cables Incapable of Transmitting Gases or Vapors.

Each multiconductor cable in conduit shall be considered as a single conductor if the cable is incapable of transmitting gases or vapors through the cable core. These cables shall be sealed in accordance with 501.15(A).
(E) Cable Seals, Class I, Division 2. In Class I, Division 2 locations, cable seals shall be located in accordance with 501.15(E)(1) through (E)(4).

(1) Terminations. Cables entering enclosures that are required to be explosionproof shall be sealed at the point of entrance. The sealing fitting shall comply with

501.15(B)(1). Multiconductor cables with a
gas/vaportight continuous sheath capable of
transmitting gases or vapors through the cable core
shall be sealed in a listed fitting in the Division 2
location after removing the jacket and any other
coverings so that the sealing compound surrounds
each individual insulated conductor in such a manner as
to minimize the passage of gases and vapors.
Multiconductor cables in conduit shall be sealed as
described in 501.15(D).

Exception No. I: Cables passing from an enclosure or room that is unclassified as a result of Type Z pressuriza-tion into a Class I, Division 2 location shall not require a seal at the boundary.

Exception No. 2: Shielded cables and twisted pair cables shall not require the removal of the shielding material or separation of the twisted pairs, provided the termination is by an approved means to minimize the entrance of gases or vapors and prevent propagation of flame into the cable core.

(2) Cables That Do Not Transmit Gases or Vapors.

Cables that have a gas/vaportight continuous sheath and do not transmit gases or vapors through the cable core in excess of the quantity permitted for seal fittings shall not be required to be sealed except as required in
501.15(E)(1). The minimum length of such cable ran shall
not be less than that length that limits gas or vapor flow
through the cable core to the rate permitted for seal fittings [200 cm 3/hr (0.007 fr/Vhr) of air at a pressure of
1500 pascals (6 in. of water)].
FPN: The cable core does not include the interstices of the conductor strands.

(3) Cables Capable of Transmitting Gases or Vapors.

Cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall not be required to be sealed except as required in
501.15(E)(1), unless the cable is attached to process