Not all the spikes seem to apply at the same time. But some does, so it doesn't seem like a single unit, but not always the same either. I have that with my S5, maybe you have a combination thereof?
Maybe if you tell us what miners they are it could help shedding some light.
The big one is you blatantly losing connection for a few minutes however.
On the graph:
Big one is S5+ single unit
S4 single unit
SP20 multiple units in operation single unit shown
S5 same as SP20
I am thinking network because I am not pulling 50 amps continuously and I am sized well under 70%. #2 copper runs from the main to the house to a 125 amp sub panel. It is ran inside liquidtight. Good stuff. I have checked all connections and measured solid line voltage, always slightly higher by a small percentage. No fluxuations my fluke can pick up, and it isn't a scope so there is a ton you cant see with a meter.
Well all I could suggest is to run some sort of network monitoring to see if your network is dropping out.
I'm not a windows fan so I've no idea what to use for that.
I (or course) run a linux box (using pppoe) as my network connection at home so I see when my network drops out and reconnects - and that matches the times when my miners drop out and reconnect. I force this once a day, but it often happens at other times also.
In my case it's just the way it is with my ADSL connection (last night from 10pm to 4am it happened 6 times ... only one of those was my daily reconnect by design ... that was the worst number in a long time)
There could of course be other reasons, but e.g. if it was the miner dropping the connection you'd need to monitor that somehow in the miner.
I am leaning towards net, I loaded a couple of things like wireshark but I haven't seen anything obvious. I will need to be more familiar with the software and how to configure it, then it will be most useful.
I want to record packet flow at my router right?
S3+ could be singled out in that chart as well and looks the same way, most of the big spikes line up. but I think it shows there is a definite issue being magnified on larger miners.
Harmonics?
It is the above listed minor small nano farm on the generic wire shelving you see in many pics. I use several 2880 power supplies with b/o boards from Finsky and Jabber. I supplement using DSP2000BB PSUs with top shelf b/o boards from sidehack and novac of Gekkoscience. Solid work, and they can take some stress if you have a power supply down. You can push either one of these hard if you need to do so. I do not recommend exceeding any specifications.
I am interrupting the thread with hardware troubleshooting.
Thank you fellas for the replies. I will take a stroll through my connections again and swap some cables, think simple for a bit and proceed.
Much Appreciated and thanks for the solid pool, I'll get my connection solid as well.
