Abstract: A color-coded modular system for outlets, switches and light outlets includes a device, box and module for residential structures: an outlet with female receptacle on the front and a male plug on the back; a switch with a switch on the front and a male plug on the back. The device has attachment ridges on side walls connectable with the box having an open front and back, and attachment ridges on the front inside walls connectable with a device, and attachment ridges on the back outside walls connectable to the module. The module's recessed face has a female receptacle connectable with the male device plugs and an insertion hole to accept wires. For commercial structures, knock outs on the module receive conduit with wires for insertion holes. A retrofit box module is one piece installed inside an existing box, existing wires inserted in the module back in insertion holes.