Common issues found that are not allowed in Canada (as per CODE):
Open joints: Commonly found in the basement, or sometimes behind walls; if two wires are tied together and are not properly installed in a junction box they are not safe. All connections should be made in an approved electrical junction box with a cover on it.
Plugs in cabinets: Commonly found on the internet; homeowners are wanting plugs installed in cabinets (especially with the rise of technology and “gadgets” for charging stations, or for certain appliances). This is not acceptable as per the Canadian Electrical Code because of the ability to close cabinet cupboards. Yes, you may say that you are only plugging your kitchen mixer in this plug and the cupboard door must be open for that to occur, however, what if your child or the next homeowner does not use it for the same function? What if a heating appliance is plugged in and the door is closed? It is a great option to be able to hide these plugs, but the ramifications can be far greater than the benefits.
Hidden junction boxes: Particularly when doing a renovation there can be issues rewiring certain devices and it is far easier to put a junction box in the wall to extend the wiring, rather than spending what could be hours trying to get rid of it. There is always an option to get rid of every junction box, however time, cost and damage is always a factor. However, if you choose to not completely rewire that junction box to get rid of it, then you CAN’T cover that box with drywall, wood, or cabinetry. EVERY junction box with an electrical connection has to be accessible.