Christmas Lights - Amps
Christmas Lights Run 250 feet from house to a tree near road. There is an outlet. Extension cord. Split to many extension cords then split to many lights. Also split after first EC to a few extension cords going to two wreathes. The lights are LEDs and it says 90 stands take less than 2 amps. We have had amp issues before but want to know if the distance of extension cord itself takes amps? Or does it just supply the one/two amps?
( Lower volts make amps rise )
But if you use a good size cord (thick as poss')
and if the load is low, like only 2 amps
then the loss will be very small
not enough to worry too much about.
Just to give you an idea of how minimal the voltage loss is with LEDs.
1000 ft of #16 wire (typical light duty extension cord) has about 2.5 ohms of resistance. So 2 amps of current would result in 2 * 2.5 = 5 volts lost in the resistance of the extension cord, leaving a nominal 120 - 5 = 115 Volts available to the LEDs.
I think the general concensis is -
Running a load of 2 amps over 250 ft
will not be a problem.
The only time it becomes a problem is with bigger loads,
So if your getting up around 10 amps or so,
A thicker power lead would be required.
A good rule of thumb is for long runs of cable
you should double the current rating,
So instead of using a cord rated for 10 amps
use a cord rated at 20 amps.
And to be technially correct leads dont eat up amps,
instead they eat up volts.
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