Abstract: A wall device is described comprising a power source base body for installation in a wall, where the power source base body comprises at least one accommodating space. The accommodating space is configured for placement of a first metal piece, a second metal piece, a third metal piece, and a fourth metal piece, where the first metal piece is a first live wire circuit, the second metal piece is a second live wire circuit, the third metal piece is an earth wire circuit, and the fourth metal piece is a neutral wire circuit. Partition plates are provided in the accommodating space to separate the positions of the first metal piece, the second metal piece, the third metal piece, and the fourth metal piece, so as to prevent the first metal piece, the second metal piece, the third metal piece, and the fourth metal piece from contacting in the accommodation space.