Can you detail the process you are following? This might help in figuring out what is going on. Are you powering up a single blade...then a second....then a third?
There is alot of unknown information here so it will make it harder to figure out where your issue is. First the AMP question....what is your AMP draw on the circuit? To find that you go to the breaker box and look up the switch. If you are in the US it should say 15a, 20a or 30a. Could just be the numbers without the letter.
Secondly how are you hooking them up? Test each one individually first...if you get similar results that's a good sign each board works. After that hook up a second board and see if you get similar results. Do this all in powersave to start with. Don't ratchet up speeds at all at this point. Hook up a third board and then 4th and 5th. Until the 0Ghs issue rears its ugly head. Again make sure NOTHING else is on that circuit where the miner is plugged in. IF so unplug it all. If there is a question of whats on the circuit go to the breaker box and switch off the circuit to see what is going on (And PLEASE be using a surge protector with your miner or you will fry it soon as it comes back on or you will have a paperweight after you flip the circuit back on).
I am covering everything just in case. I don't know your knowledge level so please don't be offended if I say something that is so basic and obvious, you would be surprised how often even advanced users miss the basic stuff.
DO things in small steps. Don't go for the big mining yet until you can determine why its not mining. I am relatively certain its a power problem but again without the questions answered above noone here can help you better address this.
To sum up:
Power single blade up in powersave mode.
Power 2 blades up in powersave mode.
power 3 blades up in powersave mode.
do this until you get to 5 working blades OR 0GHs issue. If 0Ghs issue then its almost certainly the PSU at that point. It might have a shared rail in which case I recommend getting an 8pin EPS to PCIe 6+2 pin connector (frozencpu sells them).
Also so far it seems you have only been able to get 2 cards working is that right?
I have 20a circuits.
I have the backplane plugged in.
When I power up the PSU the Raspberry Pi controller PWR light come on. After a few moments the internet connection lights turn green. Then a few moments later the fans spin up.
I am plugging the modules in one at a time and only one.
I have it set to power save mode.
1. I plug in module 1. See if it works. unplug it
2. I plug in module 2. See if it works. unplug it.
and I go down the line for all 5 modules.
all 5 do not respond.
I'm not sharing any rails right now. I have one 12v going to one module. It's one cable from the PSU to one module. That's it.
The connection on the power supply is 12v 104a.