Just remember two formulas that will help you, Power = Voltage x Current, or P (watts) = V (volts) x I (amps). Also, V (volts) = I (amps) x R (resistance in ohms). V = IR tells you that as resistance increase, voltage drops at constant amps. Plug this into the first P = VI equation and you’ll note that as voltage drops, amps will need to rise in order to feed power to the ASICs.
Power needs for your ASICs are L7 = 3425W, KD5 = 2250W, DR5 = 1800W. Assuming that your voltage would be 220V at the outlet, then you need capacity for (3425W+2250W+1800W) / 220V = 34A. Divide by 80% factor of safety and you get 42.5A, which means that you’d need two 30A circuits (e.g. 220V 30A double pole breaker) running 10/2 wire. So basically - and mind you, I’m not an electrician - you’d run the L7 on its own circuit and the KD5 and DR5 on the second circuit - either attached to a PDU or much cheaper would be two L6-30R outlets
Essentially this is my setup - though I’ll be running 4 ASICs at peak. I currently have an LT5 Pro on one 30A circuit (fwiw, I get 245V at the outlet) and a 2nd 30A circuit with two KD5’s. Once (if?) my L7 on order actually arrives, I’ll have the LT5 Pro/KD5 on one circuit with the L7/KD5 running on the 2nd circuit. I also have a whole house surge protector installed for previous owner by our power co.
I think the Tripp Lite (or similar) PDUs are very expensive for running newer high watt ASICs. A 220V 30A Tripp Lite PDU will set you back $250-$300. I don’t see the value. The larger capacity PDUs are 220V 30A, which basically allows you to connect 2 of the larger, newer ASICs. Cheaper to just to run sufficient outlets - taking care to count the amps, bake in 80% factor of safety, and run the correct gage wire.
Keep in mind that these PDUs are not surge protectors unless stated as such. If they are, look for amount of joules that it can absorb. I’m reaching the limit of my technical knowledge here but I doubt that a consumer grade surge protector would protect your ASIC miners.