Power over Ethernet testing Photo courtesy of DOE

DOE Reports on Power Losses in PoE

The key finding is that the guidance offered in ANSI C137.3-2017 does appear to be effective for runs up to 50 m.

DOE released the results of an exploratory study investigating energy losses in Ethernet cables used between power over Ethernet (PoE) switches and luminaires in PoE connected lighting systems. The key finding is that the guidance offered in ANSI C137.3-2017 does appear to be effective in limiting cable energy losses to 5% in PoE lighting applications, provided that the average cable length on a project does not exceed 50 m. The study is the first in a planned series of investigations into

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