General Terms
Ambient Temperature – All encompassing temperature within a given area
Armour – Mechanical protection usually accomplished by a metallic
layer of tape, braid or served wires; normally found under
the outer sheath of a cable
Armoured Cable – A cable provided with a wrapping of metal, usually steel
wires, flat tapes, or interlocked tapes, primarily for the
purpose of mechanical protection
ATEX – French term Atmosphères Explosibles (EU directive
94/9/EC)
AWG – American Wire Gauge
Braid Armour – A fibrous or metallic group of filaments interwoven in
cylindrical form covering one or more conductors
Cable Gland – A device used for the entry of cables or cords into electrical
equipment providing armour clamping, sealing and/or strain
relief
CB – Certification Body
Cold Flow – Any permanent deformation of the inner sheath of a cable
due to pressure or mechanical force, without the aid of heat
softening
CWCMC – Continuously Welded Corrugated Metal-clad Cable
DTS01 – Deluge Test developed by Shell, mainly used on off-shore
rigs
Directive – A legislative act of the European Union
EHSR – Essential Health and Safety Requirements – Requirements
from new approach Directives, e.g., LVD, ATEX
Hazardous – Location where fire orexplosion hazards may exist due
Location to the presence of flammable gases, dusts, or fibers
IECEx CB – IECEx Certifying Body
IECEx TR – IECEx Test Report
IP – Ingress Protection
ITC – Instrument tray cable
ITC-HL – Instrument Tray Cable Hazardous location
LVD – Low Voltage Directive (EU directive 2006/95/EC)
MC – Metal-clad Cable
MC-HL – Metal-clad Cable-Hazardous Location, for Class I Division
1 locations
MI – Mineral Insulated
MV – Medium Voltage
NB – Notified Body
PLTC – Power Limited Tray Cable
Primary Seal – A seal that isolates process fluids from an electrical
system and has one side of the seal in contact with the
process fluid
QAR – Quality Assurance Report – quality portion of IECEx
certification
QAN – Quality Assurance Notice – quality portion of ATEX
certification
Secondary Seal – A seal that is designed to prevent the passage of process
fluids at the pressure it will be subjected to upon failure of
the primary seal (secondary seals are required for sealing
conduits and cables in Class I explosive gas atmospheres,
where failure of a primary seal could allow flammable
process fluids to leak into electrical equipment, with
disastrous results)
SWA – Steel Wire Armour
STA – Steel Tape Armour (alsoDSTAfordouble steelwire armour)
SWB – Steel Wire Braid
TC – Tray Cable
TC-ER – Tray Cable Exposed Run
TECK – A type of metal-clad interlocked armour cable (mainly
used in Canada)
Wet Locations – Installations underground or in concrete slabs or masonry
in direct contact with the earth; locations subject to
saturation with water or other liquids, such as washdown
areas; and in unprotected locations exposed to weather
Reference Guide
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REFERENCE GUIDE
30 0.252 0.05 0.01 4 5.642 25 0.222
28 0.319 0.08 0.013 2 6.676 35 0.263
26 0.422 0.14 0.017 1 7.979 50 0.314
24 0.564 0.25 0.022 1/0 8.368 55 0.329
22 0.658 0.34 0.026 2/0 9.441 70 0.372
20 0.798 0.5 0.031 3/0 10.998 95 0.433
18 0.977 0.75 0.038 4/0 12.361 120 0.487
16 1.382 1.5 0.054 300MCM 13.820 150 0.544
14 1.784 2.5 0.07 350MCM 15.348 185 0.604
12 2.257 4 0.089 500MCM 17.481 240 0.688
10 2.764 6 0.109 600MCM 19.544 300 0.769
8 3.568 10 0.14 750MCM 22.568 400 0.888
6 4.514 16 0.178 1000MCM 25.231 500 0.993
Agencies and Associations
ABS – American Bureau of Shipping
ANSI – American National Standards Institute
ASTM – American Society for Testing and Materials
BASEEFA – British Approvals Service for Electrical Equipment in
Flammable Atmospheres (UK)
CEC – Canadian Electrical Code
CENELEC – European Committee for Electrotechnical Standardization
CEPEL – Brazilian Certification Body
CFR – Code of Federal Regulations (USA)
CSA – Canadian Standards Association
DNV – Det Norske Veritas
ETL – Electrical Testing Labs
FM – Factory Mutual
IEC – International Electrotechnical Commission
IECEx – IEC scheme for certification to standards relating to equipment for
use in explosive atmospheres
IEEE – Institute of Electronic and Electrical Engineers
INMETRO – National Institute of Metrology, Standardization and Industrial
Quality (Brazil)
ISA – Instrument Society of America
ISO – International Standards Organization
ITS – Intertek Testing Service
Lloyd’s Register – Ship Classification and Risk Management Organization
MSHA – Mine Safety and Health Administration
NEC – National Electrical Code
NEMA – National Electrical Manufacturers Association
NFPA – National Fire Protection Association
NRTL – Nationally Recognized Testing Laboratory
OSHA – Occupational Safety and Health Administration
PTB – Physikalisch-Technische Bundesanstalt (Germany)
TUV – Technischer Überwachungs-Verein (Germany)
UL – Underwriters Laboratories (USA)
USCG – United States Coast Guard
AWG to mm2Conversion Table
Reference Guide
AWG Diameter mm Area mm
2
Diameter in AWG Diameter mm
Area mm
2
Diameter in
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REFERENCE GUIDE
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