I plan to make some LED lighting in my room with 20 Chinese LEDs connected in series and a 20w driver. Driver current is about 300mA, the LEDs total Vf is about 60-70v, and the room perimeter is about 12m.
Will 28 AWG wire from FT be good enough to connect it? I like it being cheap and thin - less visible on the walls.
Its not so hard to use google, or is it?
Based on 212.872 ohm resistanace at 1000meters from the link, that means 2.55ohm at 12meters, 300mA current that is 0.75V lost one way and another 0.75V lost the other way, so total 1.5V voltage drop.
That means that about 2.5% of the total power will be lost in the wires.
So yes, 28AWG wires will be good enough.
Why?
1)Because the wires won’t become hot at that current.
2) Even if you run this 8 hours a day for 5 years the cost of the energy lost in wires will be smaller than the cost of getting bigger wires.
Just make sure that the wire’ insulation is able to sustain 70V! But it should be fine.
Thanks for the replies.
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I’ve seen this table. But there might have been other factors other than current and voltage drop that I’m not aware of that would limit the use of this wire. This is the reason I’ve decided to ask here.