[196258] in North American Network Operators' Group
Re: Temp at Level 3 data centers
daemon@ATHENA.MIT.EDU (Ken Chase)
Sat Oct 14 07:33:01 2017
X-Original-To: nanog@nanog.org
Date: Wed, 11 Oct 2017 15:13:11 -0400
From: Ken Chase <math@sizone.org>
To: Zachary Winnerman <zacharyw09264@gmail.com>
In-Reply-To: <85f956d1-1796-80ea-b40a-74493f0fc100@gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
As temp goes up wire resistance increases too, increasing heat, increasing
resistance, etc - and I find breakers trip more easily at hotter temps too.
/kc
On Wed, Oct 11, 2017 at 01:08:33PM -0400, Zachary Winnerman said:
>That's a good point, though if you are running your breakers that close
>I think you have bigger problems, as a power outage, however unlikely,
>could cause your equipment to not come back up at all. Software updates
>that reboot several servers in quick succession could also cause a
>breaker to trip under those circumstances. Unfortunately, there's no way
>to tell how close a breaker is to tripping without tripping it. Breakers
>may have amp meteres and a rated size, but the actual load before
>tripping is +-20% for common models, meaning a 20A breaker may trip as
>low as 16A.
--
Ken Chase - math@sizone.org Guelph Canada
