JNS Holdings Corporation announced that it has received contracts to provide fire alarm detection installations at the Ontario, Sears, Dearborn &Plymouth substations to upgrade the existing fire alarm systems. The updated systems will include removal of the existing CO2 systems, installation of new automatic sprinklers and water-flow devices, addressable photoelectric smoke detectors and clean agent suppression systems. Requirements to keep the existing fire alarm systems intact eliminating any disruption to customers during construction is another key factor in these projects.