I was working with one of our control tech, we were troubleshooting a 120Vac valve. When testing the circuit, I told him he needed to wear his voltage gloves...with a brief argument he complied...but came back the next day and told me he was taking a PLC class and he asked his instructor if gloves were needed...the instructor said no!! I'm sending a letter to the trade school informing them of the NFA70E requirements and suggesting they include 70E in as part the training program.