Why choose 120 volts?

Seth Mattinen sethm at rollernet.us
Wed May 27 17:08:55 CDT 2009


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




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