How is it determined if the wiring infrastructure is looped or home run?
Older systems were designed with either 3 wire, 6 wire or 8 wire cables connected to the remote speakers. A number count of the cables at the master station and the number of remotes must be performed. If the number counts are equivalent, then you have home run wiring. If the number of wires counted is less than the number of speakers, then this is a loop wired system.