You got me kinda stumped, I dont think it will work, both 15ampers would not split the load I believe you'd need two feeds (two separate plug runs) to do it that way even hooked in parallel regardless of load, they should both still blow at 15 amps; the second either fuse hits 15 amps they should both blow.
I'd just go get a 30 amp GFCI breaker (has a test button on the breaker), worth the cash (in case you ever pour water on your electricals) and would do the job as far as load
4x5 Reviewed by 4x5 on . Electrical Question Hi everyone:stoned: I have an electrical question for you to ponder. My grow room has its own 20amp service. Im thinking about adding more lights which will push my total demand to exactly 18.9 amps. Is this a safe enought margin? I dont want to burn my house down. That would be a bad thing. Thanks for your help :rasta: Rating: 5