In article ,
George E. Cawthon wrote:
Mark Lloyd wrote:
On Mon, 11 Dec 2006 06:00:37 GMT, "George E. Cawthon"
wrote:

Mark Lloyd wrote:
On 10 Dec 2006 18:33:59 -0800, wrote:

How can i run about six sets of christmas lights off of one outlet?
There is considerable variation between strings, so there is no simple
answer to such a vague question.

25 C9 lights use about 1.5A (180W).
25 C7 lights use about 1.3A (156W)
100 miniature lights use about .4A (48W)
LED light strings use about .015A (2W)

As to the outlet, consider what else is in use on that circuit. Most
outlets are limited to 15A (1800W) (or less if the circuit is already
heavily loaded).

When using extension cords, consider their current limits too. Usually
10A will be OK, less for very long cords.

Also, don't forget GFCIs for all outside outlets (including those
having cords going out through windows).
So, based on your wattage estimate for lights,

They're somewhat better than estimates. They're actual measurements.
However, I did add a bit for safety.
Umm, "about" doesn't suggest an actual amount.

Just a little thing I would like to add: If you measure current with a
non-true-RMS meter (one that does not boast about being "true RMS"), then
an LED string will normally have power consumption roughly 25% more than
the result of multiplying measured amps by the line voltage. Also, the
RMS current (which is what determines heating of wiring and fuses) is
often 30-90% more than that indicated by a non-true-RMS meter.

Of course, the true RMS current is still likely to be under 100 mA with
most, probably close to all 120V LED strings of up to 70 bulbs!

Another note: When the RMS current is more than 1.11 times the
average current, power factor will be less than 1. Even though power
consumption will in those cases be more than volts times 1.11 times
average current, it will still be less than volts times RMS current.

- Don Klipstein )