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The electrical junction box has a case, which accommodates a printed circuit board provided in a lower side of the case. The case also receives an electrical wiring circuit and a busbar circuit disposed in an upper side of the case so as to be parallel to the printed circuit board. Wiring harness co

The electrical junction box has a case, which accommodates a printed circuit board provided in a lower side of the case. The case also receives an electrical wiring circuit and a busbar circuit disposed in an upper side of the case so as to be parallel to the printed circuit board. Wiring harness connectors are mounted on a side wall of the case, and relay connectors are positioned on the side wall or another side wall of the case. The side walls are perpendicular to the printed circuit board. The wiring harness connectors are connected to inner circuits including the printed circuit, the busbar circuit, and the electrical wiring circuit. The case has a top cover, a bottom cover, and a horizontal intermediate partition. The intermediate partition is provided with the electrical wire circuit on an under surface of the partition so as to be opposed to the printed circuit. The upper surface of the intermediate partition is provided with the busbar circuit.

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1. An electrical junction box comprisinga case a printed circuit board having a plurality of electrical elements and disposed on an inner bottom side surface of said case, an electrical wiring circuit and a busbar circuit which are disposed in an upper side of said case so as to be parallel to said

1. An electrical junction box comprisinga case a printed circuit board having a plurality of electrical elements and disposed on an inner bottom side surface of said case, an electrical wiring circuit and a busbar circuit which are disposed in an upper side of said case so as to be parallel to said printed circuit board, at least one wiring harness connector mounted on a side wall of said case, and at least one relay connector for receiving a relay and positioned on said side wall or another side wall of said case, wherein the side walls are perpendicular to said printed circuit board, and said wiring harness connector is connected to an inner circuit including said printed circuit, said busbar circuit, and said electrical wiring circuit.