if you have a kill-a-watt meter or ammeter, use it. otherwise: place a
lighted flashlight at your circuit breaker panel. turn off the computer
and extra house lights, epecially those known to be on the gfi. plug a
power strip with resettable breaker into your gfi outlet like in the
bathroom. plug each string into the strip, one at a time. if any string
pops the bath gfi discard it. read any limits on labels and boxes and
plug and its plug's fuse. if you can plug all strings in, and not pop
the 15 amp strip or house breaker, you should be ready to continue your
project, subject to the christmas outlet's limits.

wrote:
How can i run about six sets of christmas lights off of one outlet?