Now to the big one, the generator. I am more than passing familiar with the regs in this respect, being a statutory electrical supervisor on a minesite for a number of years, and still in the game. When you say no earth requirement, I am asuuming you mean no earth stake. Every power source needs earthing, how you do it varies. To cut to the chase, I have had people turn up on site with inverter generators , attach one of those portable RCD boxes to it, press the test button on the box, have the RCD trip and say " see, RCD protected"
i would then gently point out that it was only an internal protection test they were pressing. I would then drag out the RCD tester, apply the test, and it would, of course, fail. There is no protection on these things. If you get a faulty appliance , you are not protected by any RCD, unless it is built in. These are rare or non-existant on inverter generators.
If you are in the trade, qualified, I would gladly share a copy of an excellent generator connection standard put out by the company I used to work for, and still contract to. Covers all likely scenarios,such as portable, trailer mounted,fixed, temp, permanent, changeover, and is fully AS/NZS compliant.