L6-20P -> L6-30R

Wed Mar 19 18:27:38 UTC 2014

On 03/19/2014 02:05 PM, William Herrin wrote:
> 50 watts DC. It won't electrocute you (that's AC) but it's the same 
> power that makes a 40 watt bulb burning hot.
802.3af is limited to 15.4W, and 802.3at to 25.5W.  The limits for Class 
2 and 3 circuits are found in Chapter 9, Table 11 (A and B), of the NEC 
(Table 11(B) for DC circuits, and for a power source of 30 to 60 volts a 
Class 2 circuit can have, for a 44VDC supply power, up to 3.4A available 
(a max nameplate rating of 100VA).  For AC, Table 11(A) tells me that a 
120VAC circuit, to meet Class 2, must be current-limited to 5mA.

BICSI has a good set of slides on the NEC at 
http://www.bicsi.org/uploadedfiles/Conference_Websites/Winter_Conference/2012/presentations/Interpreting%20the%20National%20Electrical%20Code.pdf