[114837] in North American Network Operators' Group
Re: Why choose 120 volts?
daemon@ATHENA.MIT.EDU (Seth Mattinen)
Wed May 27 18:09:18 2009
Date: Wed, 27 May 2009 15:08:55 -0700
From: Seth Mattinen <sethm@rollernet.us>
To: "nanog@nanog.org" <nanog@nanog.org>
In-Reply-To: <alpine.BSF.2.00.0905271735350.848@murf.icantclick.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
david raistrick wrote:
> On Tue, 26 May 2009, Joe Greco wrote:
>
>>> http://www.cdw.com/shop/products/default.aspx?edc=1036852
>
>> Great, you're the latest person to invent a way to present a 5-15R that
>> offers something besides 120VAC. This is neither new nor novel, but it
>> *is* dangerous and risky, and in no way "solves the problem."
>
> No, this does NOT present 208v at a 5-15R. Don't believe me, buy one
> and put a voltmeter across it.
>
> I'll leave the FUD to others.
>
Here's the L-G voltage off the 208v taps from an isolation transformer
in a system with no neutral: http://ninjamonkey.us/not_120_volts.jpg
In other words, in a system with no neutral, it's not designed to do
120v loads. The L-L voltage on that same PDU is 211. Also, the device
you linked will present high voltage because again, no neutral.
~Seth
