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On this occasion we are answering a Peruvian engineer's question, which is the following: Ing. Prada, I would be very grateful if you could please clarify a matter for me. If for a project design that will only use hoses for a building in Peru, 500 GPM and a pressure of 140 PSI are required for the main pumping equipment. My question is if this equipment is going to be electric, without yet having the catalogs for it, an estimated power of 70 HP has been given to the electrical engineer. However, the designer of the fire fighting system tells me that the power of the equipment according to the catalog must be taken into account to deliver to the electrical specialist and this must be the one that corresponds to the power of the equipment when working at ZERO flow. In this video we resolve that question. Remember to share the video so that many more specialists learn and do not make conceptual errors.