Exact power.....hookup question

They generally recommend plugging the SP-15 into the EP-15 so that the balanced transformers of the SP benefit from the regulated power of the EP-15. Then you should connect all of your low power components (digital, preamp, etc.) to the SP outlets but your power amps will probably sound best connected directly to the EP since it is not as current limited as the SP outlets. Good luck!

OK, if Nsgarch says it's a no-no then I yield to his experience and expertise. My recommendation was based on the manufacturer's own guidance which was provided in their documentation. Just as a point of interest Exact Power did manufacture a 20 amp version of the EP at one point, but it was almost twice as expensive as the EP-15 and physically much larger and heavier.