What length of copper feed cable can be run from the Protectowire FireSystem Control Panel to the beginning of the Protectowire Linear Heat Detection zone?
Fire Alarm Cable variation in gauge size and resistance will effect the overall allowable run length from panel to zone start point. Protectowire panels are designed to accommodate up to 100 Ohm of feed cable. The allowable length = 100 Ohms divided by the number of Ohms per unit length (feet or meters) of feed cable. The maximum allowable feed cable length is typically reduced to 18 Ohms when the alarm point location meter is employed.
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