Electrical connection systems and methods are disclosed. An electrical system includes an electrical plug and an electrical receptacle. The electrical plug has at least one prong having at least one opening. The electrical receptacle has at least one socket, an electrical contact positioned within the at least one socket, a light source positioned to transmit light through the at least one socket, and a photodetector positioned to receive the light transmitted by the light source through the at least one socket. The electrical receptacle further has a microprocessor programmed to selectively couple the electrical contact with the power source based on the light received by the photodetector.