Provided is a wall grommet, which can be installed through the surfaces of walls to route wiring in the walls' interior spaces. In particular, the wall grommet is configured for running power cords inside walls and presenting the electrical connectors of a power cord in a manner such that power cords are hidden from view. The grommet may comprise a power module and a back cover. The power module comprises a housing, which defines an interior space that is adapted to hold either the female connector or male connector of a power cord. The back cover can be attached to the housing to secure the electrical connector of the power cord in the housing.