All 3 phases are equally dangerous to touch! If there is a ground wire, that is (ideally) safe to touch, but there is no neutral wire in a 3 phase system. All 3 wires are equally "hot". Edit: Although ...

Claiming a breakthrough in residential metering technology, the 71M6523 3-phase system-on-chip employs the company's Single Converter Technology, which eliminates the need for isolating individual ...