What is the maximum listed spacing for each type of Protectowire Linear Heat Detector in open areas?

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What is the maximum listed spacing for each type of Protectowire Linear Heat Detector in open areas?

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The listed spacing shall be used as a guide or starting point in detector installation layout. Reduced spacing is required based upon factors such as ceiling height and construction, physical obstructions, air movement, or the Authority Having Jurisdiction (AHJ). The maximum listed spacing for each type of Protectowire Linear Heat Detector are as follows: Factory Mutual Listed Spacing All temperature ratings except 356F of Types EPC, EPN and EPR 30 feet (9.14 meters) on center, Type TRI 15 feet (4.6 meters) on center. 356F EPC and EPR proximity detection only. Underwriters Laboratories Listed Spacing All temperature ratings EPC, EPN and EPR 50 feet (15.

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