4 ms·
DC wiring is already standard in many office buildings in the form of power over Ethernet (PoE). It powers access points, lighting, and infrastructure, and high
by klondike_ 5y ago
DC wiring is already standard in many office buildings in the form of power over Ethernet (PoE). It powers access points, lighting, and infrastructure, and high power variants can do 100W+. Since it's under 50V, the IT guy can install it without a qualified electrician.
High power loads like motors and heaters will continue to require AC but I see no reason why small loads can't use PoE. I would love to see it take off for residential use, especially for IoT stuff.
- jwr 5y agoPoE is great, but it's really a crutch: a workaround for when you can't run additional wiring. Its main advantage is that you don't have to use additional wiring. The only reason PoE makes sense at all is because it uses 48V, but due to the flimsy cables the losses are still 15-20%. Not great.
- throw0101a 5y ago> It powers access points, lighting, and infrastructure, and high power variants can do 100W+. 802.3bt Type 4 allows for sending 100W down Cat 6A cables, but only 71W is available at the other end. That's highly inefficient. * https://en.wikipedia.org/wiki/Power_over_Ethernet#Standard_implementation https://en.wikipedia.org/wiki/Power_over_Ethernet#Standard_i...
- upofadown 5y agoThe loss is proportional to the length and ethernet cables are usually much shorter than the maximum length allowed by the standard.