Mother Mine - Extreme Mining Setup

String said:
First of all, wdnsr had a fuse box malfunction so the answer is he didn't manage to run all those rigs. He is also having problems running them all currently. Secondly, just because something works doesn't mean it's ok. You could run a domestic shower with 2.5mm cable... But you could also fry an egg on that same cable when it's running, and showers don't run 24/7 like your mine will!

Post or PM me the quote if you don't mind. I honestly can't get into what I would do it for because I haven't worked out what you need yet.

You still haven't told me what heats, cooks and cleans in your house, gas or electricity? Will also need to know if your cable head fuse is 63A or 100A.

As for the actual draw of each rig, this is being debated a bit here. There's one easy way to settle it, build one of them and plug it in via a current metre and it'll tell you to the exact watt. I can link you to a cheap current metre if you don't have one already.

I'll post back with some sums on worst case scenario load based on what you have told me so far.
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Emailed you :)

E: Damn no trust lol.
 
Quote:
1. Supply and install new 40 amp cable to garage from house consumer unit to garage to replace existing underrated cable. Path to be lifted and trench dug by others.
2. Supply and wire in garage 5 double 13amp sockets on new ring circuit with 32amp fuse.

Im asking him to lay down thicker cable so the amp rating will be higher.

House is Gas and Electric (Gas hob for example). 100Amp input.

Whats in the house. Well no power showers or anything like that. Just the usual stuff you would find in a house with standard white goods in the kitchen and a few TVs around the house.

And yes please let me know which current meter you can recommend.
 
rush_syndrome said:
Surprised no one has mentioned "diversity" yet?

A ring main is made with two 2.5mm cables. Diversity is calculated in the the regs to de-rate circuits which are unlikely to use their full capacity. Connecting mining rigs is a different scenario and is not suitable for consideration as a ring main. It is moreso a commercial grade installation in a house, and as such the regs do not cater for it.

There is no such thing as a 4.0mm ring main. You would be better off, getting a 64amp breaker in the main consumer unit and sending that via a 10mm FT&E to a 63amp switch fuse running another small distribution unit with two 32 amp MCB's (motor rated to allow for the inrush when they all kick in) and an RCD. Then run 6mm from the 32A MCB's into a double clad twin socket outlet, one for each RCD. Now you can pull what you like without fear of volt-drop, diversity or any other scenario.

The breakers are not there to protect your computers. They are not there to save them in event of an overload. They are there solely to protect the wiring from acting as a fuse and bursting into flames in a short circuit scenario.

Domestic wiring is not designed in the wiring regulations for this purpose; it is designed so that Billy can run a computer in one room, Jackie can do hair for ten minutes with a big hair dryer, Dad can mow the lawn and mum can cook a roast.. but not all together and not continually. If people fail to grasp the risks associated with overloading electrical circuits, then they will witness first hand overloaded and burned out sockets and fires. Sorry to sound like an alarmist but having witnessed such things over the last 30 years, I speak with sentiment and experience.

If you call in an electrician, ensure that you tell him that your equipment will draw X amps from the socket continually. Also tell him that the ambient temperature in that area is X degrees because he will have to derate the cables load carrying capacity due to the excessive ambient temperature. When the ambient rises, the resistance goes up (just like Delta T) and the carrying capacity goes down.

There are some great builds here guys. Just as you've spent a lot of time reseaching your rigs, please do the same with your electrical installations. A domestic sparky even with 17th Edition Part P is not used to seeing an installation like this in a domestic house. Please treat the installation as a commercial one because that is exactly what it is. Sorry for the lecture.
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Sound advice. This is exactly what I am doing (Ive had two electricians already who have stated similar things to me).
And we also have yourself and String :)
 
Cavallino said:
Fully agree with you.

1. Ok use 2.4kW (this is gonna bite me in the ass I know it). But the reality 6 x 280xs will use less than 2400w, infact I was going to change my PSUs down to 2000W per 6 x 280xs. Shall we base it on 2kW?

Going for 4 rigs but planning for 5. Say 4 for now.

2. Ok go with 2.4kW as you mentioned for all the appliances.(this is going to be upwards of 10kW lol).

And yes the rigs will be on 24/7.

(how the hell is wdnsr running all those rigs lol - hes running just as many cards as I plan to).

I just got my quote back from the electrician. Not happy lol.

Want 5 double sockets put in. How much would you charge for the above?
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Ok, 2.4 KW per rig plus 2.4 KW for ancillary items equates to 12 KW.

CURRENT = POWER / VOLTAGE = 12000 / 230 = 52A.

52Amps.

Dude, take your time with this installation. First thing you need to do us build one rig and prove how much it draws. Then, recalculate and figure out if it will all work safely. Also, that heater will have to go.

Will hit trust for that email...
 
Cheers String. Yes I will definitely measure the current. Any recommendations for measurement equipment?

I put the quote above, we based it on drawing 8000W.
 
Cavallino said:
Quote:
1. Supply and install new 40 amp cable to garage from house consumer unit to garage to replace existing underrated cable. Path to be lifted and trench dug by others.
2. Supply and wire in garage 5 double 13amp sockets on new ring circuit with 32amp fuse.

Im asking him to lay down thicker cable so the amp rating will be higher.

House is Gas and Electric (Gas hob for example). 100Amp input.

Whats in the house. Well no power showers or anything like that. Just the usual stuff you would find in a house with standard white goods in the kitchen and a few TVs around the house.

And yes please let me know which current meter you can recommend.
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Mate, I'll pick this up tomorrow I really need to hit the hay!

I don't know how this trust thing works, let me know and you can PM or email.

100A cable head fuse is good news. Sit on the quote and don't rush this.

Plug one rig into one of these and run at full pelt, set it to watts, and then you know for sure how much it draws.

** link removed, see OCUK item in post below **
 
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Cavalino, can I make a suggestion? Invite your chosen electrician round, but do not tell him you want a 40 amp circuit. Tell him how many devices you intend to hang off the supply and ask for his recommendations. If you go down the route of telling him that you need 40 amps, you may need a lot more!

Any proper electrician will calculate the circuit loading and will produce a recommendation based on what the regulations specify as being safe and suitable.

The problem with the internet is that a little knowledge is dangerous. What I think I'm seeing here is complacency: people are prepared to spend £5k on a rig but do not want to spend money where it counts on a proper and safe electrical installation. With this in mind, why would anyone want to specify an electrical system based on 5 computers? Why not design from the ground up a system which can run 6 as an example. If you have to pay a sparky to make you a dedicated circuit, then you may as well ask him to make it capable of running a few more as the cost difference will be minimal within reasonable scope.. it's not like it's going to use more electric for the mining rigs you haven't yet bought ;)
 
rush_syndrome said:
Cavalino, can I make a suggestion? Invite your chosen electrician round, but do not tell him you want a 40 amp circuit. Tell him how many devices you intend to hang off the supply and ask for his recommendations. If you go down the route of telling him that you need 40 amps, you may need a lot more!

Any proper electrician will calculate the circuit loading and will produce a recommendation based on what the regulations specify as being safe and suitable.

The problem with the internet is that a little knowledge is dangerous. What I think I'm seeing here is complacency: people are prepared to spend £5k on a rig but do not want to spend money where it counts on a proper and safe electrical installation. With this in mind, why would anyone want to specify an electrical system based on 5 computers? Why not design from the ground up a system which can run 6 as an example. If you have to pay a sparky to make you a dedicated circuit, then you may as well ask him to make it capable of running a few more as the cost difference will be minimal within reasonable scope.. it's not like it's going to use more electric for the mining rigs you haven't yet bought ;)
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Just want to add that the bottom line is that there is a definite limit to what a domestic supply can run on a 24 hour basis. The important thing here is to establish exactly how much current each rig consumes, and then work out the maximum number of rigs that can be achieved.

No electrician is able to increase the maximum load his supply can take, and no one can reduce the power consumption of the kit being used.
 
If anyone would like some guidance I'm more than happy to help BUT without seeing the actual installation it is IMPOSSIBLE to decide what is actually needed as everyones' place is different.

String I'm miles away from my regs books on a training course all week. It might be prudent to look at the cable sizing and power factors tables when trying to calculate the effect on load. You are on the money with what you say.

Anyone seriously considering running 5 or more mining rigs should seriously consider either a data centre placement or utilizing 3-phases to balance out the load. Be safe people :)
 
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Tonester0011 said:
String, might want to edit out the link in your post.
OCUK stock power meters so would be classed as competitors.

YOUR BASKET
1 x Energenie Power Meter £12.98
Total : £18.96 (includes shipping : £4.98).

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Thanks for that, totally forgot about the rules on that. They are all much of a muchness, the OCUK one will do fine plus it's a fiver cheaper!
 
String said:
Mate, I'll pick this up tomorrow I really need to hit the hay!

I don't know how this trust thing works, let me know and you can PM or email.

100A cable head fuse is good news. Sit on the quote and don't rush this.

Plug one rig into one of these and run at full pelt, set it to watts, and then you know for sure how much it draws.

** link removed, see OCUK item in post below **
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Can you provide me with the model number of the meter you quoted originally or is it a competitor own brand?

Don't worry about the quote it can wait till tomorrow

Trust needs to be enabled once you've achieve a certain number of posts I believe?
 
rush_syndrome said:
Cavalino, can I make a suggestion? Invite your chosen electrician round, but do not tell him you want a 40 amp circuit. Tell him how many devices you intend to hang off the supply and ask for his recommendations. If you go down the route of telling him that you need 40 amps, you may need a lot more!

Any proper electrician will calculate the circuit loading and will produce a recommendation based on what the regulations specify as being safe and suitable.

The problem with the internet is that a little knowledge is dangerous. What I think I'm seeing here is complacency: people are prepared to spend £5k on a rig but do not want to spend money where it counts on a proper and safe electrical installation. With this in mind, why would anyone want to specify an electrical system based on 5 computers? Why not design from the ground up a system which can run 6 as an example. If you have to pay a sparky to make you a dedicated circuit, then you may as well ask him to make it capable of running a few more as the cost difference will be minimal within reasonable scope.. it's not like it's going to use more electric for the mining rigs you haven't yet bought ;)
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Absolutely. I only have one rig running at the moment and will determine what kind of load it pulls (its not fully up and running as it has 5 GPUs and I want to base my project on 6GPUS).
 
The one I picked up is an energenie ENER007, Would have ordered from OCUK but they have no stock....

Cost £10.50, and works just fine. Voltage measurement agrees with my multimeter, Current and power seems sensible. Tells me that the pair of R9 270's just installed in my rig are only pulling <400W across the whole system!
 
All of a sudden the mass mining project seems a long way away now!

Good luck but looks like another few thousand pounds needed to even get the rigs up and running now which you'll need to factor in when trying to work out if it's even a profit making exercise anymore.

Good luck!
 
All the rigs have been running fine for 24 hours or so now. The new fuse box that the electrician fitted is fine.

Back to full ~20MH/s speed now! :D
 
rush_syndrome said:
If anyone would like some guidance I'm more than happy to help BUT without seeing the actual installation it is IMPOSSIBLE to decide what is actually needed as everyones' place is different.

String I'm miles away from my regs books on a training course all week. It might be prudent to look at the cable sizing and power factors tables when trying to calculate the effect on load. You are on the money with what you say.

Anyone seriously considering running 5 or more mining rigs should seriously consider either a data centre placement or utilizing 3-phases to balance out the load. Be safe people :)
Click to expand...

To be honest, I'd rather see the results of the load test on one rig to see exactly what we are dealing with, Rush. As for 3 phases, it just won't be possible from a domestic supply.

Also, there is no way I would advise utilising a single ring main for multiple rigs. Each rig will draw close to the 13A rating that a socket outlet can provide in terms of current carrying capacity. Each rig should be serviced by a 16A circuit breaker in garage consumer unit, 2.5mm radial to fused (13A) double pole switch, which will provide supply to a twin socket outlet. Both PSU's can then be fed from the socket. This would obviously have to be multiplied by the number of rigs. The actual cost increase of doing it this way as opposed to a single ring main is really quite low.

Anyway, the main thing is to work out exactly what each rig will draw, and also get an idea of what the rest of the house draws at peak time. The bottom line is that this mass mining project might not be possible from a domestic supply without reducing the number of rigs involved.
 
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