3 ms·
The data center I work in has 415 VAC power coming in to each rack, with three phases and a neutral. Equipment gets a phase and a neutral, for 240 VAC (though
by CaliforniaKarl 7y ago
The data center I work in has 415 VAC power coming in to each rack, with three phases and a neutral. Equipment gets a phase and a neutral, for 240 VAC (though not in a configuration you’d normally expect).
It’s important to remember that everything is contained in equipment made by companies that I trust (Rittal and Eaton and APC). Also, everything is grounded (the doors to the racks, the racks to the cable ladder, and the cable ladder to a special ground), which is in addition to the equipment ground. Finally, I know (and work with) the people who build and maintain the infrastructure.
As for the thick cable, if you’re up to it, here’s a video showing a process for joining the cables together: https://youtu.be/EvWx-VKVvmo https://youtu.be/EvWx-VKVvmo
The thing to note, is the layers of copper ground that are wrapped around each conductor line, as well as the bundle itself.
- scrumper 7y agoThanks. Had to do some reading to understand that, made more sense once I learned the phase-neutral voltage was the supply voltage / sqrt(3) not just divided by 3. Then I started reading about wye configurations and now it's time to stop. There's a marvelous video somewhere on YouTube showing someone splicing a _live_ conductor while dangling from a helicopter. Can't find it now. Yours still gave me the willies though! Horrid big deadly snakey things. Ugh.
- jacquesm 7y ago"Pick up that cable, will you" "Feel anything?" "No?" "Ok, then the other one is the live high tension one..."
- camtarn 7y agoThis one, I reckon. https://www.youtube.com/watch?v=piQpLL5nD18 https://www.youtube.com/watch?v=piQpLL5nD18
- scrumper 7y agoThat's the one.
- new4thaccount 7y agoThe complex imaginary channel on YouTube for the power PE test covers when to use sqrt(3) and starts off very basic.