I put a six gauge wire on a 70 amp circuit breaker, from my main 200 amp fuse box to a spare room, how many s3's will I be able to run on that circuit, air conditioner is on a separate 20 amp breaker.
thanks in advance
70amp double pole? You can pull 56 constant amps through each wire at 120V each.
You could run about 34-36 S3's off that depending on how good your PSU's are.
It will get warm.
Stop right now. Call an electrician and get him/her to install a sub panel, tell the electrician your power needs. Do this before you burn your house down and void your insurance
edit: get permits and have it all inspected