Topic: 208 Volt outlet fried two s15 Machines, any idea why (Read 129 times)

It is very likely that you have unbalanced 3 phase system which resulted the  difference in voltages on different phases. This may be due to the fact that electrical  loading  on each of 3 phases are not equal. For example 1st phase is feeding the powerful   kitchen appliances while the 2nd -   low-duty rooms lightning and the 3rd  - power outlets. When you plugged  in S17 the phases unbalance increased causing the further increase of the voltage on one of the phases and voltage drop on the other one. Such unbalance has been aggravated with the plug-in of S15 and resulted in machine fry.  

and a three phase main panel has three hots along with a ground.

my guess is the electrical guy wire the socket

hot-hot-hot

which will blow those power supplies up.

what interested me is the  s17 two plug did not fry.

Yup.  They don't want a 4th wire.

those power supplies want two 110/120 hots and a ground.

Is the power supply rated for 3 phase?

huge chance he wired receptacle wrong.

photo the receptacle.

and post a photo of it here.

there are a lot of ways to wire it wrong.

you have three phase

so there are three hot wires and a ground going into the big box

then an outlet  is attached to the big box.

the outlet needs two hots and one ground.

since the big box has three hots and a ground.

my guess is the receptacle is wired

hot-hot-hot. and that fries your psu.

i smell a small claims lawsuit as asshole owes you two pieces of gear.

taking the meter and putting it in the hot holes in the receptacle will read 208-210.

but what does the ground hole and the left hot hole show.
and what does the ground hole and the right hot hole show.

my guess is 208-210 and he gave you three hots in that receptacle.

I am tired and on a shit ipad laying in bed watching the late show.
in the morning i will find some links to show what i am describing to you.

it would be nice if asshole pays you for the gear he fried.

note i am not an electrician just a dedicated miner.

i could be wrong. so dont freak until i find some links.

I think its from the PSU of the miner

Did you buy them as a used miner? or did you bought them directly from Bitmain?

Is the burning smell is directly from your s15 miner? or it was from your circuit?

Try to ask the electrician how gauge/thickness of the wire you use in the circuit.

According to some research "a 15amp circuit requires a 14 gauge copper wire" so maybe the smell you get is the burnt wire is from your circuit?
Did you check the outlet if how many amp can handle it?

I have experienced before that one my outlet burn and found out the thickness of the wire is very thin compared to other outlets.

I just had a new electrical system installed.  I do not know a whole lot about electricity, but I know it was a 3 phase system with 20 amp breakers.  I think the outlets are L6 or something like that, shouldnt be important with regards to this question.

So, while the electrician was still there, I plugged some of my known working machines in.  The first machine worked fine, it was an S17, using 2 separate 20 amp breakers.  Then I plugged in one of my S15 machines, so single plug, single outlet, 1 breaker.   The fans did not spin and I immediately smelled that telltale "I just fried my box" smell.  My electrician convinced me that it was just my machine, so try another one out, and same thing happened.  Im afraid that I literally just fried about $3000 worth of miners, infront of the electrician.   I am making it a point to say the electrician was there so that "call a qualified electrician" isnt the standard response, as it is in most forums about electrical.

He said everything is wired right and its my machines, and i am not willing to plug any more in to test out his theory that if i just keep plugging more machines in, i will get a different result.

Could some one please give me some ideas, what I could ask the electrician to check on his end.  I saw him use his testing tool on the outlet, and it was reading about a 210 volts, so the voltage is good.  Is there any wires that could be "crossed or shorted" or maybe a mistake he made in the panel (im not an electrician so i dont know what im talking about)

Any help would be appreciated, seems that even with a licensed electrician we cant figure it out, so im just hoping someone who is familiar with bitcoin machines could shed some light.  Maybe even give me hope that i didnt ruin the machines.

What would cause simply plugging in a machine to fry?