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A2.
Hazardous Location Wiring
North America
Class I, Division 1 and Group II, Zone 1 Requirements:
Wiring shall be in accordance with the applicable portions of the National Electrical Code, ANSI/NFPA 70
(NEC), for the United States, the Canadian Electrical Code, CSA C22.1 (CEC), for Canada.
NEC. Fixed wiring methods for Class I, Division 1 locations, specifies threaded rigid metal conduit,
threaded steel intermediate metal conduit, type MI (mineral insulated), type MC (metal clad), or type ITC
(intermediate tray cable), listed for use in Class I, Division 1 locations, with termination fittings approved
for the location (Division 1, Group C & D). Sealing and drainage shall be provided in accordance with
Article 501-5(a), (c), (d), and (f).
Wiring methods for Class I, Zone 1 locations, allows all wiring methods permitted for Class I, Division 1
locations (above).
CEC. Wiring methods for Class I, Zone 1 (Class I, Division 1 per Appendix J18-106) locations, specifies
threaded rigid metal conduit or cables approved for hazardous locations with associated cable glands
(explosion-proof seal fittings) that comply with Rule 18-100 and Appendix B18-100.
When installed with rigid metal conduit explosion-proof seal fittings approved for the location shall be
installed in each conduit run within 3.8 cm (1.5 in.) of the Sensor Assembly explosion-proof enclosure.
When installed with cable, explosion-proof seal fittings shall be installed within 3.5 cm (1.5 in.) of the Sensor
Assembly explosion-proof/flameproof enclosure, or explosion-proof/flameproof direct entry cable glands
approved for the location shall be used.
Class I, Division 2 and Group II, Zone 2 Requirements:
NEC Fixed wiring methods for Class I, Division 2 locations, specifies threaded rigid metal conduit,
threaded steel intermediate metal conduit, type MI (mineral insulated), type MC (metal clad), type ITC
(intermediate tray cable), or type TC (tray cable), listed for use in Class I, Division 2 locations, with cable
with termination fittings approved for the location (Division 2, Group C & D). Sealing and drainage shall
not be required to be explosion-proof and shall be provided in accordance with Article 501-5(b), (c), (d),
and (f).
Wiring methods for Class I, Zone 2 locations, allows all wiring methods permitted for Class I, Division 2
locations (above).
CEC Wiring methods for Class I, Zone 2 (Class I, Division 2 per Appendix B18-156) locations, specifies
threaded rigid metal conduit or cables approved for hazardous locations with associated cable glands that
comply with Rule 18-100, or type TC cable installed in cable tray in accordance with Rule 12-2204; or type
ACWU cable, with associated cable glands that comply with the requirements of Rule 18-150; or type
ACIC control and instrument cables with interlocking metallic armor and a continuous jacket, with
associated cable glands that comply with the requirements of Rule 18-150.
Cable Systems for Division 1 / Zone 1 and Division 2 / Zone 2
Marine Shipboard Cable Installations on Offshore Oil Rigs and Drilling Platforms:
Cable and fittings for threaded connection to equipment in hazardous locations shall conform to the
installation and use provisions of Sub-part 111.60 of the United States Coast Guard Electrical Engineering
Regulations, Subchapter J (Title 46 Code of Federal Regulations, Part 110 to 113 inclusive) as applied by
the authority having jurisdiction for the installation.
Release 8
RMA 3000 Remote Meter Assemblies User Manual
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