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US – New Standard for Land Mobile Radios TIA 4950

Photo: Telecommunications
Photo: Telecommunications
The Telecommunications Industry Association (TIA) has received rights to UL 913 5th edition and has created a new standard specifically for land mobile radios[1]. This standard is, Requirements for Battery-Powered, Portable Land Mobile Radio Applications in Class I, II, and III, Division 1, Hazardous (Classified) Locations, ANSI/TIA-4950-2013.

UL 913 5th Edition will be withdrawn by 2018 and will be replaced by UL 913 8th Edition. The 8th Edition creates a much more stringent assessment for intrinsic safety by referencing UL 60079-0 and UL 60079-11 for the majority of the requirements.  These standards are aligned with the IEC publications. There are some obvious differences between the standards and specifically pertaining to radio devices, the limit on RF power threshold. The following are the limits: Group IIC(Hydrogen) – 2W, Group IIB(Ethylene) – 3.5W, Group IIA(Propane) – 6W.

Tanle: New Standard for Land Mobile Radios TIA 4950
New Standard for Land Mobile Radios TIA 4950
Tanle: New Standard for Land Mobile Radios TIA 4950
New Standard for Land Mobile Radios TIA 4950

Note: TIA 4950 does not specify a maximum wattage requirement, however general rule is 5W or less.

There are a significant amount of additional differences in the standards and the following are some of those differences:

UL 60079-0

  • Non-metallic enclosures testing for thermal endurance, resistance to light, and electrostatic charges
  • Metallic enclosures requires material compositions specified

UL 60079-11

  • More stringent 1.5 safety factor applied for spark ignition assessment
  • Current Limiting Resistor test is not allowed

Due to these reason, a new standard was developed to meet the needs for future land mobile radio products that have higher RF power.

SGS was recently accredited to the following standards: UL 844, UL 783, NFPA 496, TIA 4950, FM 3600, FM 3610, FM 3611, FM 3613, and FM 3620.

As the world’s leader in third party testing SGS has the global knowledge and local expertise to help you achieve compliance with Electrical & Electronics regulations covering product safety, EMC, hazardous substances (RoHS, REACH, SVHC etc), energy efficiency, Ecodesign, ErP, Performance and Reliability as well as with many other consumer product related requirements. Whether you are in need of testing or services in the fields of inspection, certification, compliance assurance, outsourcing, training or auditing SGS is ideally positioned to satisfy your needs. http://www.sgs.com/en/Consumer-Goods-Retail/Electrical-and-Electronics.aspx

Email SGS Hong Kong Ltd. at mktg.hk@sgs.com for enquiries or visit http://www.sgsgroup.com.hk/.

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[1] new standard

Content provided by SGS Hong Kong Limited
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