Hi Bought this inverter: https://www.amazon.co.uk/gp/product/B076P9PGX3/ref=ask_ql_qh_dp_hza I am trying to understand what sort of protection against shock is required. I have seen some discussions around floating ground, that RCD will not work without earth etc. To explain I did the following: 1. - I watched explanation around RCD's and: a) if the electricity goes through my body to ground then my understanding is that it would work b) I am not sure if this will work if I let's say electricity will flow only through my body, not to ground, so I will become part of the circuit (same will come back through my body)? c) furthermore interesting subject is as well, in case of powering the circuit from battery you will not be shocked until you hold both poles as electricity will not flow due to imbalance inside of the battery? 2. I asked the supplier and the reply is: "The unit has two internal fuses, and if you were to use the car lighter socket, then the car circuit will be fused as well (often 10amp). Presumably anything you plugged into it will have a fused plug (or certainly should do) so just check the fuse is the correct rating. So theoretically you've got 3 separate fail-safes, so I think you would not require an RCD." I guess they don't understand what fuses are about? Yes they could work (too late) but the electricity needed to stop my heart I guess is much less than fuse rating. 3. It can definitely kill you following this: https://electronics.stackexchange.c...-from-a-120v-300w-ups-enough-to-kill-a-person So my question still stands, how to protect yourself from electrical shock if you use inverter? Is there any device I can just plug in to inverter which will work like RCD? Then in home installation, if I hold hot and then touch cold - my understanding is that it is same case - so RCD will not work (with assumption nothing goes to earth so no imbalance?). Let's say the scenario is that I have socket from car/battery on wet ground where I am standing. Sorry for all confusion I am just trying to understand.