OK Panhandle | OSHA considers anything 50V and higher as dangerous. Others say that 30V is the conservative threshold for dangerous voltage. From Iowa State:
In industry, 30 volts is generally considered to be a conservative threshold value for dangerous voltage. The cautious person should regard any voltage above 30 volts as threatening, not relying on normal body resistance for protection against shock. That being said, it is still an excellent idea to keep one’s hands clean and dry and remove all metal jewelry when working around electricity. Even around lower voltages, metal jewelry can present a hazard by conducting enough current to burn the skin if brought into contact between two points in a circuit. Metal rings, especially, have been the cause of more than a few burnt fingers by bridging between points in a low-voltage, high-current circuit.
In practice, standard power over ethernet (PoE) runs at ~48VDC. If you somehow get in contact with it, it'll definitely wake you up. But in the electrical code, network cable that carries 48VDC is considered low-voltage cable and doesn't have to be placed into conduit, so the NEC doesn't see it as life-threatening enough to justify extra protection. He'll be fine with the 30V you're talking about as long as he respects it like anything else that's electrified. |
Christmas present for son. But don’t want him to get shocked
