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 .