RF Engineering & Safety Code 6 Every time you make a call, stream a video, or watch a smart meter report back to the grid, there's an RF engineer who already did the hard part — long before the tower went live. That work has a name most people outside the industry never hear: Safety Code 6. 🇨🇦 What Safety Code 6 actually is Safety Code 6 is Health Canada's guideline for limiting human exposure to radiofrequency electromagnetic energy, covering the full range of frequencies