Yes and yes. Let me be clear that I’m a lawyer and have absolutely zero knowledge or even an understanding of electricity and only a rudimentary grasp of electrical safety regs. But while I can’t offer anything on the technical side, what I DO know, as a lawyer, is that you have a duty to guard against foreseeable risks. The origin of that duty in Ontario is OHS Act Sec. 25(2)(h) which requires employers to “take every precaution reasonable in the circumstances for the protection of a worker.” (Every other province has a similar provision in its OHS Act).
My assumption is that the reason you’re asking these Qs is that you do, in fact, recognize a hazard. If so, you need to deal with it.
Hope that helps. Glenn