Following Electrical Codes - Teledyne Meridian User Manual

• Electromagnetic Fields – although the device is designed to be RFI/EMI resistant, mounting the device near
power transformers, walkie-talkies, or other strong EM fields may cause undesirable results. Avoid strong EM
fields.
• IP ratings do not imply that the equipment will detect gas during and after exposure to those conditions.
• Conduit seals and drain loops – be sure to install explosion proof conduit and other materials required for
electrical wiring in hazardous areas in accordance with National Electrical Code (NEC) and Canadian
Electrical Code (CEC) requirements. Seal all conduit connections should and install a drain loop to protect
the device electronics from moisture.
• Direct Bold Sunlight – use a sun shield when mounting the device in direct sunlight (see
• Environmental Damage – make every effort to protect sensors from environmental damage caused by water,
snow, shock, vibration, dirt, and debris.
• Air Variables – be sure to consider factors such as air movement, gas density in relation to air, emission
sources, gas interferences, and environmental variables when determining the correct device location. Care-
fully evaluate air movement by fans, prevailing winds, exhaust ducts, strong air-flow through a room, and con-
vection to determine if a leak is more likely to raise gas levels in certain areas within the facility. High air
velocities result in inaccurate measurement and reduce sensor life.
• Distance – all systems that separate the transmitter from the sensor have distance limit specifications. Ensure
that the application's distance requirements are within specifications and that the appropriate gauge wiring is
used.

4.1.3 Following Electrical Codes

WARNING: TO AVOID AN EXPLOSION OR ELECTRICAL FIRE, ENCASE THE CABLE
CONNECTION TO THE DEVICE IN CONDUIT. THE CONDUIT MUST MEET PREVAILING
ELECTRICAL CODES FOR HAZARDOUS-AREA INSTALLATIONS, WHICH SPECIFY CONDUIT
SEALING, EXPLOSION-PROOF FITTINGS, AND SPECIAL WIRING METHODS. FAILURE TO DO
SO COULD RESULT IN INJURY OR DEATH.
WARNING: CONNECT THE GROUND WIRE TO THE GROUNDING SCREW ON THE
DEVICE'S HOUSING. FAILURE TO DO SO COULD RESULT IN INJURY OR DEATH.
For North America installations:
• To meet prevailing electrical codes, use conduit and all other materials required for electrical wiring in haz-
ardous areas. Install wiring according to National Electrical Code (NEC) Articles 501-517.
• As supplied, the Sensor Head wiring is already sealed and requires no additional sealing to conform to NEC
requirements for explosion-proof installations, as long as the detector is mounted no further than 18" (457mm)
from the device [NEC Article 501-5(a)(1)].
For International installations, Ensure installation meets prevailing electrical codes or standards for hazardous-area
installations. For example, IEC/EN 60079-14 standard.
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prohibited.
MERIDIAN
UNIVERSAL GAS DETECTOR
INSTALLATION
Appendix D. Parts List).
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