An electrical panel comprising: a housing configured to house one or more electrical components provided with one or more plug-in receptacles that are accessible from outside the housing and a shutter door assembly coupled to said housing, said shutter door assembly comprising a compartment door and a barrier panel slidably coupled to said compartment door, said barrier panel configured to be placed in a closed position that obstructs access to the one or more electrical components through said compartment door and an open position that provides access to the one or more electrical components through said compartment door; wherein said compartment door comprises at least one opening configured to be blocked by said barrier panel when said barrier panel is in the closed position; wherein said barrier panel comprises at least one opening, said at least one barrier panel opening being configured to align with said at least one compartment door opening and the at least one electrical component in the open position, said barrier panel being configured to slide relative to said compartment door between the closed position and the open position, and said electrical panel further comprising one or more guide brackets coupled to said compartment door and said barrier panel, wherein said guide brackets are configured to maintain alignment of said barrier panel with respect to said compartment door; wherein said compartment door comprises a slot elongated in a sliding direction of said barrier panel, and said barrier panel comprises a first protrusion that extends into said slot; and wherein said compartment door comprises a second protrusion that aligns with said first protrusion in at least one of the closed position and the open position, and said first protrusion in at least one of the closed position and the open position, and said first protrusion and said second protrusion are configured to enable a locking device to lock said first protrusion to said second protrusion. a housing configured to house one or more electrical components provided with one or more plug-in receptacles that are accessible from outside the housing and a shutter door assembly coupled to said housing, said shutter door assembly comprising a compartment door and a barrier panel slidably coupled to said compartment door, said barrier panel configured to be placed in a closed position that obstructs access to the one or more electrical components through said compartment door and an open position that provides access to the one or more electrical components through said compartment door; wherein said compartment door comprises at least one opening configured to be blocked by said barrier panel when said barrier panel is in the closed position; wherein said barrier panel comprises at least one opening, said at least one barrier panel opening being configured to align with said at least one compartment door opening and the at least one electrical component in the open position, said barrier panel being configured to slide relative to said compartment door between the closed position and the open position, and said electrical panel further comprising one or more guide brackets coupled to said compartment door and said barrier panel, wherein said guide brackets are configured to maintain alignment of said barrier panel with respect to said compartment door; wherein said compartment door comprises a slot elongated in a sliding direction of said barrier panel, and said barrier panel comprises a first protrusion that extends into said slot; and wherein said compartment door comprises a second protrusion that aligns with said first protrusion in at least one of the closed position and the open position, and said first protrusion in at least one of the closed position and the open position, and said first protrusion and said second protrusion are configured to enable a locking device to lock said first protrusion to said second protrusion.