In a method for manufacturing a junction box, a first cut switch or a second cut switch is selectively provided to a main body. The first cut switch is capable of connecting and breaking a connection between a first power input circuit and a first output circuit, and connecting and breaking a connection between a second power input circuit and a second output circuit. The second cut switch is capable of connecting and breaking a connection between the first power input circuit and the first and second output circuits. The main body includes the first power input circuit; the first output circuit disconnected from the first power input circuit and having at least one of a first electrical device connected thereto; the second power input circuit; and the second output circuit disconnected from the second power input circuit and having at least one of a second electrical device connected thereto.