4 ms·
I have always heard that <50V is considered low voltage by electrical safety standards, which is why 48V is a good choice.
by TorKlingberg 10y ago
I have always heard that <50V is considered low voltage by electrical safety standards, which is why 48V is a good choice.
- dfox 10y agoFor electrical safety, <50V DC is common definition for ELV. For some (probably business oriented, ie. to do price differentiation for telco equipment) reasons, some electronics manufacturers classify anything over 30V as high voltage.
- asmithmd1 10y agoThe US National Electric code defines <50V as low voltage but UL defines anything over 20V as high voltage. UL generally deals with products so that is probably why they are more conservative. Picture a baby sucking on something and you can imagine why they want anything over 20V to be double insulated. If car manufactures want to comply with UL standards that would mean they would no longer be able to use the car's frame for the current return path.
- IshKebab 10y agoYeah I've always heard that. I just looked it up and it's actually 75V DC in the EU, and 50V AC. http://ec.europa.eu/growth/sectors/electrical-engineering/lvd-directive_en http://ec.europa.eu/growth/sectors/electrical-engineering/lv...