What is the recommended spacing for linear heat detection cable at ceiling level? The ceiling height is 50 ft. The current spacing is 20 ft between cables.
What brand do you have?
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Looks like you need a fire protection engineer or good fire alarm company to decide spacing, if you want it at the 50 foot mark.
I would give protectowire a call first, the question must have come up before, and see what solutions people have used.
Or do you already have the wire at 50 feet, and just questioning it??
What is the maximum listed spacing for each type of Protectowire Linear Heat Detector in open areas?
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 is as follows:
Factory Mutual Listed Spacing for 155°F and 190°F rated Types EPC, EPR, XCR, and XLT – 30 feet (9.14m) on center, Type TRI – 15 feet (4.6 meters) on center. Protectowire 220°F and 280°F Types EPC and XCR – 25 feet (7.6m) on center. Protectowire 356°F Types EPC and XCR rated for proximity detection only and do not have a rated spacing.
Underwriters Laboratories Listed Spacing, for all models (except Type TRI) – 50 feet (15.24 meters) on center. Type TRI is FM approved only and not UL Listed.
Does not get into height??
not, however, provide guidance for ceiling
heights over 30 feet (9.1m). In such installations,
engineering judgment, the manufacturer’s
recommendation or detector spacing
approved by the authority having jurisdiction
should be used.
check page eight::
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