In 406.3 it allows you to replace a non-grounding type receptacle with a GFCI type receptacle providing you label the receptacle ?no equipment ground? I recently received a call from a electrician who replaced multiple 2-wire receptacles in a residence with GFCI (in the kitchen and bathroom) utilizing only the 2-wires and no equipment ground I understand this will still operate properly however the question was ?how do I label the receptacle? and I was not sure GFCI receptacles come with stickers indicating GFCI protection for load side protected receptacles but how do you identify ?no equipment ground?? With a Sharpe? I was not sure and would like to know how everyone else accomplishes this? Also new receptacles would only connect the 2-wires not the ground as indicated in the code, is this due to the fact you could create a dangerous situation putting current on the ground with nowhere for it to go. Thanks.