Another thing,
Any grower needs to have a voltage meter and check the readings of their outlets they are using for their grow with their equipment turned on.
If the reading is > 7 volts + or - from 120 don't even bother using it. 116v is OK, for example, but 104 would be a big Do Not Use.
This is because the loss in voltage accumulates over the area from where the outlet is, to the fusebox, and a loss equates to that energy being distributed somewhere along the path, which creates heat, which causes fires. This is why VU meters are important!
Another tip. If you are running more than 1kw, run them off different 30 amp fuses to help with the loads.