Electrical code is complex, but more importantly there is not one unified electrical code. Your municipal, county, or state government determines what the elect

Electrical code is complex, but more importantly there is not one unified electrical code. Your municipal, county, or state government determines what the electrical code is in your location. Usually it will be the National Electrical Code (NEC) but inclusion, but probably an older version, and then most governments have implemented various changes on top of that. So the first question to answer is what NEC allows, but you will then need to double-check for your specific context. Further, the power inlets are NEC approved but that in no way means that they are approved for this use. I'm far from an expert on the NEC but I can pretty confidently assert that it allows such inlets only for specific uses, and you would need to check carefully that what you propose is one of those uses. A very rough rule of thumb is that you are not normally allowed to have more than one "user-removable plug" on the path to a device. There are a number of exceptions to this, but any time you're plugging into something that plugs into something else, you need to check carefully if what you're doing is allowed.