By NFPA
This version of NFPA 20, normal for the install of desk bound Pumps for hearth safeguard, used to be ready by means of the Technical Committee on hearth Pumps and acted on via the nationwide hearth defense organization. Inc., at its may perhaps assembly held may well 17-20, 1999, in Baltimore, MD. It used to be issued via the factors Council on July 22, 1999, with an efficient date of August thirteen. 1999. and supersedes all past variations.
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Additional info for NFPA 20 - Standard for the Installation of Stationary Fire Pumps for Fire Protection
Sample text
1 Copyright NFPA An automatic controller shall be self-acting to start, run, and protect a motor. An automatic controller shall be pressure switch actuated or nonpressure switch actuated. An automatic controller shall be operable also as a nonautomatic controller. 2 A nonautomatic controller shall be actuated by manually initiated electrical means and by manually initiated mechanical means. 2 Automatic Controller. 1* Water Pressure Control. There shall be provided a pressure-actuated switch having independent high- and low-calibrated adjustments in the controller circuit.
4 All controllers and transfer switches shall be listed as “suitable for use as service equipment” where so used. 5 All controllers shall be marked “Electric Fire Pump Controller” and shall show plainly the name of the manufacturer, the identifying designation, and the complete electrical rating. Where multiple pumps serve different areas or portions of the facility, an appropriate sign shall be conspicuously attached to each controller indicating the area, zone, or portion of the system served by that pump or pump controller.
This switch shall be responsive to water pressure in the fire protection system. 6 bar) without losing its accuracy. Suitable provision shall be made for relieving pressure to the pressure-actuated switch to allow testing of the operation of the controller and the pumping unit. ] Water pressure control shall be as follows. (a) For all pump installations, including jockey pumps, each controller shall have its own individual pressure-sensing line. (b) The pressure-sensing line connection for each pump, including jockey pumps, shall be made between that pump’s discharge check valve and discharge control valve.