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On Sat, Oct 15, 2011 at 10:55:31AM -0400, Chuck Anderson wrote: > On Wed, Oct 12, 2011 at 09:08:05AM -0400, Jerry Feldman wrote: > >> We are running 2 208VAC circuits. We have 7 old Intel Whitebox systems > ... > > (http://goo.gl/L3GpJ). I preferred the 5-20R because all of my systems > > can plug directly into it without me having to add additional cables. > > 5-20R are not spec'ed for use at 208V. It is against electrical code > to use them on 208V circuits. That is why PDUs often have IEC > 60320-C19 outlets and C20 inlets on them--they are universal for use > with 120/200/208/230/240V circuits, depending on the input cord > selection. Clarifying my answer... all IEC 60320 couplers are rated to 250V so they can all be used for 120V, 208V, etc. The different pairs C13/C14, C19/C20 refer to their maximum current ratings, temperature ratings, etc. http://en.wikipedia.org/wiki/IEC_60320 For NEMA connectors such as 5-20, the number 5 refers to a 125V rating. 6 would be used for a 250V rating. "L" would be used to indicate a twist-lock style connector. http://en.wikipedia.org/wiki/NEMA_connector
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