An electrical junction box is adapted to be set in a conductivity inspection device. The conductivity inspection device includes a sensing pin assembly and guide pins, the guide pins extending beyond the sensing pin assembly. The electrical junction box includes a casing including a containing section and at least two guide holes formed in a surface wall of the casing, the guide holes being spaced away from each other by a given distance. The casing is shaped such that when the electric junction box is set in the conductivity inspection device, the guide pins are inserted into the guide holes before the sensing pin assembly is inserted into the containing section.