5 ms·

There already is a DC standard, it's for telecom and it uses 48V. You can buy PSU's off the shelf for many systems. 48V is better than 12 because the wiring g

There already is a DC standard, it's for telecom and it uses 48V. You can buy PSU's off the shelf for many systems. 48V is better than 12 because the wiring gauge is smaller and line loss is more efficient.

deleted 11y ago
[deleted]
Scoundreller 11y ago
-48V. I'm trying to find out why negative is used, but the answers seem to vary a lot...
- btgeekboy 11y ago
  I've always been under the impression it was corrosion related.
  - c22 11y ago
    This is my understanding as well. I believe the effect is called cathodic protection[1]. [1] https://en.wikipedia.org/wiki/Cathodic_protection https://en.wikipedia.org/wiki/Cathodic_protection
spacecowboy_lon 11y ago
Running of DC is how Telecoms Exchanges (central offices) have run since the year dot. So this is not exactly a new discovery.
- NickHaflinger 11y ago
  So, the Telecom companies created a time travel device went forward to 2015 and stole Microsoft's innovation :)
  - spacecowboy_lon 11y ago
    No of course not must have sent the machine back pre ww2 and nicked a lot of TI's (technical instructions) from the GPO / Bell
amalag 11y ago
48V and DC power is ok for low amperage stuff like telecom. But powering servers takes a lot of watts. So the only practical way to do that would be to power a rack with high voltage AC (120/240/400) and then have a single AC-DC and supply servers in the rack with DC. The battery systems described in this article would have to be single per rack in this configuration. Until the industry started getting making new DC-DC power supplies with batteries.