UL = Underwriters Laboratories
UL is somewhat like CE in Europe.
CE is there to protect people…making sure that people cannot touch anything hot or dangerous,
CE is there to protect people and affects everything from battery operated devices to toys to mains powered devices. In the case of mains powered devices tests relate to making sure that people cannot touch anything hot or dangerous, the capability of devices to survive power surges or externally induced static, and the radio wave emission and susceptibility.
UL (United States)
UL relates to devices that are connected to mains power, and is mainly designed to protect
equipment and facilities. This is important in an ASIC hosting facility, where a huge amount of power is consumed.
UL testing involves making sure that power connections are made properly, and that the correct materials are being used to avoid fires in case something goes wrong.
UL is not applicable to equipment that is battery powered or low voltage powered (ie. 12VDC or similar).
make sure equipment says “UL Listed” rather than “UL compatible” or similar statements
When it comes to “UL”, make sure equipment says “UL Listed” rather than “UL compatible” or similar statements which have no meaning. In the Bitcoin miner hosting world, there aren’t many UL listed power options, but nonetheless it’s important to understand the regulations as the industry matures, so that manufacturers feel the pressure of consumers.