Would you rather have the Pi dump all the available current through a short, start a fire, and burn down your house? With no protection on the PI you're relying on the RCD or fuse in the plug or breaker panel to protect you.
While I entirely support having both an appropriately rated MCB (circuit breaker) and an RCD (residual current device) on every mains circuit, this will not protect against the effects of a fault on the low voltage side of a switched mode PSU. By nature these isolate the output from mains, so there can be no earth leakage faults.* While the PSU is working properly, it will limit output current to its maximum rating, but that could be enough to start a fire n the wrong circumstances.For your soul's peace: there is an overload breaker in the socket where my PSU is plugged.
* Note that the circuit of a properly designed PSU does "leak" some mains current to the output -- not enough to trip an RCD, but enough to give you that (safe) tingle if the entire output side is unearthed, and you are earthed, and you touch the powered equipment.... This is done so that RF interference is reduced.
Statistics: Posted by davidcoton — Tue Dec 03, 2024 5:40 pm