you really need to check your circuit breaker thats only only way to know for sure but generally 15-25 amps. but remember thats per circuit not per outlet. 1000 watts is roughly going to pull 9.2 amps. like i said if you have other big items on that circuit. example A/C, refrigerators you get it. i had a problem when i started my grow i had my window a/c around 1100 watts plus light and fans another 600 watts, and computer plus TV, all on the same circuit, i didnt know they were all together, but found out quickly because everytime the A/C would cycle on all lights in apartment and grow closet dimmed for a sec then came back to full power. not good if your using HighOutput lights even if not still not good for electronics. so i had to use power other circuits to run my lights once i did that it cleared up. but like i said originally depends whats on that circuit. hope i didnt ramble on to much and hope this helps.
