Cringley speculates like hell:
Delta Airlines last night suffered a major power outage at its data center in Atlanta that led to a systemwide shutdown of its computer network, stranding airliners and canceling flights all over the world. You already know that. What you may not know, however, is the likely role in the crisis of IT outsourcing and offshoring.
Do any Soylentils have inside/better information?
(Score: 2) by Scruffy Beard 2 on Tuesday August 09 2016, @05:56PM
According to this page (PDF) [nema.org] the standard trip current is about 6mA.
120V/6mA=20kOhms.
But a whole-building supply may be a 600V, raising that to 100kOhms (within an order of magnitude of 1MOhm).
Now why a whole-building should trip on 6mA, I don't know.
(Score: 3, Informative) by Scruffy Beard 2 on Tuesday August 09 2016, @06:08PM
Whole-building devices may be more likely to trip at 500mA.
Residual-current device [wikipedia.org]