[114856] in North American Network Operators' Group
Re: Why choose 120 volts?
daemon@ATHENA.MIT.EDU (Pete Templin)
Thu May 28 10:38:49 2009
Date: Thu, 28 May 2009 09:38:34 -0500
From: Pete Templin <petelists@templin.org>
To: Dave Larter <dave@stayonline.com>
In-Reply-To: <8B79B73777E7D544A24BEB8FC50D35DB5981BD@MERCURY.socrdu.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Dave Larter wrote:
> Seems like if the c14 was connected to a 240v PDU the 5-15 would
> deliver 240v to the equipment, arc/pop tripping the breaker on the
> PDU as soon as it is connected killing power to everything on that
> PDU. Or am I missing something?
If you plug a PDU into a service that's higher voltage than expected,
why would the PDU circuit breaker trip? That breaker is measuring
current, AFAICT, though in the end it might be measuring power.
Regardless, it isn't measuring voltage, because that isn't constant
(it's AC, after all) and is likely to drop under a short circuit, not
skyrocket like the current will.
pt
