Comments on: Huge Power Upgrade

By: Conan

Conan — Thu, 27 Aug 2009 20:56:55 +0000

Brad, not an electrician, but the screw terminals would have to be near the ground for them to arc.
The three wires you see are for 3 phase power, a system that uses offset alternating current to provide peak power.
So the three wires you see are all for the positive current…hence no arc, I believe.

By: Brad Allen

Brad Allen — Sun, 01 Mar 2009 19:33:27 +0000

Looking at the screw terminals, I’m surprised the terminals are so close at such high volts and amps. Can an electrician explain the proximity of those items to me in respect to the energies Sonic uses?

By: Dane Jasper

Dane Jasper — Mon, 26 Jan 2009 22:50:27 +0000

Yes, the Cat was here just in case PG&E failed during the six hour window of the migration. During that time, our own automatic transfer switch was the item we were working on, meaning we had to have another transfer switch and generator on site to pick up the load in case of utility outage.

-Dane

By: Brian Petro

Brian Petro — Mon, 26 Jan 2009 22:06:22 +0000

I assume the second backup generator is in the “cat” trailer and isn’t permanent? In theory, how long can you now run off your UPS with your current datacenter load?

Thanks for your great work guys!

By: Sonic.net Status » Blog Archive » Santa Rosa Datacenter Power Maintenance

Sun, 25 Jan 2009 02:14:53 +0000

[...] This work was completed as planned, with no interruption in service. For details, see http://corp.sonic.net/ceo/2009/01/24/power-upgrade/. -Dane Share and [...]