american dj power bar circuit breaker tripping

[BlueTang<3]

so i have a 8 outlet power bar and it was fine for about 4 months and recently it will randomly trip which baffles me i have reduced power consumption considerably i dropped down over 500 watts in consumption with a skimmer and pump smaller heater upgrade and never had a problem before correct me if i am wrong i know the breaker is in amperage but would less wattage = less amperage ??