The beginning of the Fiber Optic Linear Heat Detection Cable is fusion spliced to an E2000 pigtail for connection within the controller enclosure. For single ended configurations (similar to Class B) the end of the Fiber Optic Linear Heat Detector is terminated with a 65 foot (20M) service loop and then capped. For double ended configuration (similar to Class A) the end of the Fiber Optic Linear Heat Detector is fusion spliced to a second E2000 pigtail for connection within the controller.