Disclosed herein is an electrical power outlet strip having a longitudinal extending housing including a base housing portion and a plurality of covers for attachment to said base housing portion along the longitudinal direction; and a plurality of electrical wires placed inside the housing. Each cover has same dimensional measurements and may be a sealing cover or a socket cover. A sealing cover has no hole for receiving an external plug. Whereas a socket cover provides plug holes for receiving an external plug. The electrical power outlet strip may have all sealing covers, all socket covers, or a combination of sealing covers and socket covers.