listed for the application.
FPN: See 727.4 and 727.5 for restrictions on use of Type ITC
cable.
(2) Flexible Connections. Where necessary to employ flexible connections, as at motor terminals, flexible fittings listed for Class I, Division 1 locations or flexible cord in accordance with the provisions of 501.140 shall be permitted.
(3) Boxes and Fittings. All boxes and fittings shall be approved for Class I, Division 1.
(B) Class I, Division 2.
(1) General. In Class I, Division 2 locations, the following wiring methods shall be permitted:
(1) All wiring methods permitted in 501.10(A).
(2) Threaded rigid metal conduit, threaded steel intermediate metal conduit.
(3) Enclosed gasketed busways, enclosed gasketed wire-ways.
(4) Type PLTC cable in accordance with the provisions of Article 725, or in cable tray systems. PLTC shall be installed in a manner to avoid tensile stress at the termination fittings.
(5) Type ITC cable as permitted in 727.4.
(6) Type MI, MC, MV, or TC cable with termination fit- tings, or in cable tray systems and installed in a manner to avoid tensile stress at the termination fittings.
(7) In industrial establishments with restricted public access where the conditions of maintenance and supervision ensure that only qualified persons service the installation and where metallic conduit does not provide sufficient corrosion resistance, reinforced thermosetting resin conduit (RTRC), factory elbows, and associated fittings, all marked with the suffix -XW, and Schedule 80 PVC conduit, factory elbows, and associated fittings shall be permitted.
Where seals are required for boundary conditions as defined in 501.15(A)(4), the Division 1 wiring method shall extend into the Division 2 area to the seal, which shall be located on the Division 2 side of the Division 1-Division 2 boundary.
(2) Flexible Connections. Where provision must be made for limited flexibility, one or more of the following shall also be permitted:
(1) Flexible metal fittings.
(2) Flexible metal conduit with listed fittings.
(3) Liquidtight flexible metal conduit with listed fittings.
(4) Liquidtight flexible nonmetallic conduit with listed fittings.
(5) Flexible cord listed for extra-hard usage and provided with listed bushed fittings. A conductor for use as an equipment grounding conductor shall be included in the flexible cord.
FPN: See 501.30(B) for grounding requirements where flexible conduit is used.
(3) Nonincendive Field Wiring. Nonincendive field wir- ing shall be permitted using any of the wiring methods permitted for unclassified locations. Nonincendive field wiring systems shall be installed in accordance with the control drawing(s). Simple apparatus, not shown on the control drawing, shall be permitted in a nonincendive field wiring circuit, provided the simple apparatus does not interconnect the nonincendive field wiring circuit to any other circuit.
FPN: Simple apparatus is defined in 504.2.
Separate nonincendive field wiring circuits shall be installed in accordance with one of the following:
(1) In separate cables
(2) In multiconductor cables where the conductors of each circuit are within a grounded metal shield
(3) In multiconductor cables, where the conductors of each circuit have insulation with a minimum thickness of 0.25 mm (0.01 in.)