Safety connection electrical systems and methods

An electrical connection system comprising:

• an electrical plug having a plurality of prongs, at least one of the prongs having at least one opening;
• and
• an electrical receptacle comprising:
• a plurality of sockets sized to receive the plurality of prongs from the electrical plug;
• an electrical contact positioned within each of the plurality of sockets, at least one of the electrical contacts selectively coupled with a power source;
• a light source positioned to transmit light through at least one of the sockets, the at least one socket positioned to receive the at least one prong having the at least one opening;
• a photodetector positioned to receive the light transmitted by the light source through the at least one socket and through the at least one opening formed in the at least one prong of the electrical plug;
• and
• a microprocessor programmed to selectively couple the at least one electrical contact with the power source only after the light received by the photodetector completes a sequence of (1) not received, (2) received, (3) not received.