Performed annual safety and savings plan inspection. Noted all findings on the inspection form and discussed findings with the homeowner. Supplied, installed and cut in two round plastic junction boxes in first-floor plaster ceiling for smoke detector system. Ran 14-3 Romex from basement to attic. Extended wire to the new junction box in the basement ceiling and on to existing junction box in the basement ceiling that had power. Extended wire in attic crawlspace to first new cut-in box in the main living area and then to new cut-in box in bedroom hallway ceiling. Wired all junction boxes and connected to existing power for the smoke detector system. Installed and tested three hardwired, battery back-up, interconnected combination smoke detector/carbon monoxide detectors.