Residential Limit 15amp or 20amp?

[repairguy]

Well,then post the correct info  

Show me where I am so far off.

Gladly,

2011 NEC Table 310.15(b)(16)
60 degree column
14awg  15amp
12awg  20amp
10awg  30amp
 8awg  40amp
 6awg  55amp
 4awg  70amp
 3awg  85amp
 2awg  95amp
 1awg 110amp


I am not going to calculate the watts, For any one interested, take amperage x voltage x 0.8 to get your total watts for a constant load.

[Unacceptable]

Thank you,but I'm an A/C installer & have been for over 8 years,an electrician for 4 years before that.

As an example,8 AWG is very common here in florida for 5 ton/10kw air handlers.Normal draw is 48-52 amps at start up.Never had an issue with well over 1000 installs 

It's good that it under rates the amperage though,better safe than sorry   

[repairguy]

Thank you,but I'm an A/C installer & have been for over 8 years,an electrician for 4 years before that.

As an example,8 AWG is very common here in florida for 5 ton/10kw air handlers.Normal draw is 48-52 amps at start up.Never had an issue with well over 1000 installs  

It's good that it under rates the amperage though,better safe than sorry  

Really? You have a 5ton ac that starts at 52 amps.  The 5 tonners I install pull 150+ at startup, However the rla is 29.2 amps x 1.25 is 36.5 amps and 8 gauge wire is appropriate for that.

They aren't underrated, that is code. A 12 gauge wire will carry 100+ amps, It will just get really hot. The code is calculated based on safe temperature for the wire and the insulation around it.(I thought you were an electrician? You should know this!)  Also circuits are not sized on startup loads, A single phase psc motor like a refrigeration compressor will draw its lra when it starts, but that is only for a few seconds.  The circuit is designed on rla.

[TheWoodser]

A few years back in the height of the foreclosure crisis, we each bought nifty-fifties ranch style homes with basements.  We moved the furnace/AC and hot water tanks out of the basements to ground floor or attic locations, leaving the entire basements essentialyl free span except for the beam supporting posts.  This was not originally done with crypto mining in mind but it is going to work out well for it.

About three minutes after the inspector signed off on the job I was busily running new circuits in preparation for mining as we are using these three locations for the upcoming mining farm offering; Lost Dutchman Mining.

LostDuchman, Do you have any pics of your mining farm? 

Also, What's the meaning behind the name?  Any nod to mythical "Lost Duchman Mine" in California, or Arizona, or Colorado???  (Where eve they claim it is now...)  Do you prospect with the GPAA?

Thanks for entertaining me!

Woodser

[zedicus]

Do these pdu's need some kind of adapter on the inputs or what?


 

I just noticed the one i have (pictured) wont allow me to plug in my rig into those input slots. My rig uses standard atx- power supply.   The end that plugs in into the wall or power has a round ground. Like this ...




Do i need special cables /adapter now to go from my power supply to connect to the inputs on the pdu?

[repairguy]

http://www.ebay.com/itm/AC-Power-Cord-C13-to-C14-14-AWG-2-Grey-Lifetime-Warranty-/370989253263?pt=US_Power_Cables_Connectors&hash=item5660aec28f

[zedicus]

http://www.ebay.com/itm/AC-Power-Cord-C13-to-C14-14-AWG-2-Grey-Lifetime-Warranty-/370989253263?pt=US_Power_Cables_Connectors&hash=item5660aec28f

Spoon fed.

^^ Hey Repair guy thanks!! But dont be a dickhead! You were snarking at Unacceptable for trying to help and he had to call you out on it for you to even retort with an answer  ..

If you are a prick by nature and im asking something of you that you just cant manage, i understand..

In life you always pay for everything with time, money or inconvenience. In this case i paid with cash for an electrician and parts and in btc i will be paying to whatever Death&Taxes bitcoin address is.

Furthermore i may just pony up some btc to a couple other random people in this thread like Pentax, LostDutchman, Coinhoarder, Dalkore, Unacceptable and lightfoot since they gladly jumped to help a newbie miner from making mistakes that may lead to his home burning down. I work like 10 hours a day so i may miss some stuff when im speed reading just trying to get stuff to work and they where helpful and appreciated.

 Now if you have another snarky reply then just shut the fuck up and and get the fuck out my thread.  

But if you want to be helpful in a thread that may help many other people, now and in the future then carry on. Your knowledge and experience is welcome.


Everybody else, thank you very much your help was very much appreciated! Mission is accomplished!! I got a dedicated 30a breaker. I got the 10 gauge branch line and the nema l6-30r locking outlet & PDU so im good to go!  If i scale up any further ill just duplicate the setup.



For anyone starting this thread backwards you want this below!

********************************************************
THE DEATH&TAXES PROTOCOL :
 30A breaker, 10AWG branch line, and a NEMA L6-30R outlet (240V, 30A, locking).  Cheap used datacenter PDU with a NEMA L6-30P plug.  "Good for a solid 5.76KW."

[repairguy]

http://www.ebay.com/itm/AC-Power-Cord-C13-to-C14-14-AWG-2-Grey-Lifetime-Warranty-/370989253263?pt=US_Power_Cables_Connectors&hash=item5660aec28f

Spoon fed.

^^ Hey Repair guy thanks!! But dont be a dickhead! You were snarking at unacceptable for trying to help and he had to call you out on it for you to even retort with an answer  ..

If you are a prick by nature and im asking something of you that you just cant manage, i understand..

In life you always pay for everything with time, money or inconvenience. In this case i paid with cash for an electrician and parts and in btc i will be paying to whatever Death&Taxes bitcoin address is.

Furthermore i may just pony up some btc to a couple other random people in this thread like Pentax, LostDutchman, Coinhoarder, Dalkore and lightfoot since they gladly jumped to help a newbie miner from making mistakes that may lead to his home burning down. I work like 10 hours a day so i may miss some stuff when im speed reading just trying to get stuff to work and they where helpful and appreciated.

 Now if you have another snarky reply then just shut the fuck up and and get the fuck out my thread.  

But if you want to be helpful in a thread that may help many other people, now and in the future then carry on. Your knowledge and experience is welcome.


Everybody else, thank you very much your help was very much appreciated! Mission is accomplished!! I got a dedicated 30a breaker. I got the 10 gauge branch line and the nema l6-30r locking outlet so im good to go!  If i scale up any further ill just duplicate the setup.



For anyone starting this thread backwards you want this below!

********************************************************
THE DEATH&TAXES PROTOCOL :
 30A breaker, 10AWG branch line, and a NEMA L6-30R outlet (240V, 30A, locking).  Cheap used datacenter PDU with a NEMA L6-30P plug.  "Good for a solid 5.76KW."

Sorry, I was being a large dick, I apologize. By the double f bomb drop I hope your not still upset with me.  I really did intend to help, otherwise I wouldn't have posted. I am having difficulty with something totally different and have been screwing with it for idk how many hours and it was pissing me off and vented a little here, With the spoon fed comment, Sorry.

However, Nothing irritates me more than people who claim to know what they are doing and clearly have no idea, I corrected him, referenced the code and he still argued. Wtf? 

I really do want to be helpful, I enjoy this hobby and want to encourage others the same.

[zedicus]

^^ Aw man.. now i feel bad.    Apology accepted! I had one of those days last week so i know what ya mean!

Thanks for your input in this thread man!! Good luck on what you were working on..

[repairguy]

That whole deal with unnaceptable irritated me because he provided wrong information and I corrected him and referenced the code, then he still argued with me about something he clearly had no knowledge of.  I guess I kind of took it as insulting.  Again sorry.

[repairguy]

^^ Aw man.. now i feel bad.    Apology accepted! I had one of those days last week so i know what ya mean!

Thanks for your input in this thread man!! Good luck on what you were working on..

Good luck to you with your rig building. The cord you are looking for is a c13 to c14, and if you look around be sure to use one that is at least 14awg.

[zedicus]

^^ Good deal! Thanks again man! I will source it tomorrow hopefully locally.. if not i will snag a couple from the one you linked to.

[TinkerTom]

I had the same question on adapters and got some of these http://amzn.com/B004OC579E and these http://amzn.com/B00066HQ50. They both seem to do the trick, though I don't have my outlet installed yet, so haven't fired everything up. They're pretty inexpensive, especially if you have Prime.

Btw, to your original post, I had an electrician install a 50A subpanel to my basement (rather than running 2 circuits). I'll run a 30A 240 and 20A 110 from it. It cost $550 -- they said it generally is about $10 * #Amps, more or less. That's in Colorado, fwiw, maybe give a general ballpark at least. It was a pretty short run from my existing panel (maybe 25'?) and another friend helped get it prepped with a channel through to the basement.

My main gear will run on the 240 and I'll have that 20A if I need to add a/c or for future machines. Thanks also to all in this thread for the advice!

[DeathAndTaxes]

I had the same question on adapters and got some of these http://amzn.com/B004OC579E and these http://amzn.com/B00066HQ50. They both seem to do the trick, though I don't have my outlet installed yet, so haven't fired everything up. They're pretty inexpensive, especially if you have Prime.

While that will work they make cords which have the correct connectors on each end.  As pointed out above you just need a C13 to C14 cord.  It is pretty common in datacenters.   Almost all electronics (like your ATX PSU) have C14 inlet, and PDU have C13 outlet.  So a single cord is used for everything.  Servers, switches, routers, firewalls, etc.

For amazon:
http://www.amazon.com/Tripp-Lite-P004-004-18AWG-Connectors/dp/B003MG9F78/ref=sr_1_2?s=electronics&ie=UTF8&qid=1390094044&sr=1-2&keywords=C13+to+C14

This is just an example I typed "C13 to C14" there may be (and likely is a cheaper, better version) but the cable one needs to go from PDU to PSU without any adapters is a C13 to C14 cable.

[zedicus]

I had the same question on adapters and got some of these http://amzn.com/B004OC579E and these http://amzn.com/B00066HQ50. They both seem to do the trick, though I don't have my outlet installed yet, so haven't fired everything up. They're pretty inexpensive, especially if you have Prime.

While that will work they make cords which have the correct connectors on each end.  As pointed out above you just need a C13 to C14 cord.  It is pretty common in datacenters.   Almost all electronics (like your ATX PSU) have C14 inlet, and PDU have C13 outlet.  So a single cord is used for everything.  Servers, switches, routers, firewalls, etc.

For amazon:
http://www.amazon.com/Tripp-Lite-P004-004-18AWG-Connectors/dp/B003MG9F78/ref=sr_1_2?s=electronics&ie=UTF8&qid=1390094044&sr=1-2&keywords=C13+to+C14

This is just an example I typed "C13 to C14" there may be (and likely is a cheaper, better version) but the cable one needs to go from PDU to PSU without any adapters is a C13 to C14 cable.

DeathAndTaxes!!! Nice link .. cheap too!!

 Thanks for your contribution to this thread! Where is your btc tip jar..!! I wanna by ya beer!
Ill hunt you down from your site if i dont hear from you! Thanks again.

I had the same question on adapters and got some of these http://amzn.com/B004OC579E and these http://amzn.com/B00066HQ50. They both seem to do the trick, though I don't have my outlet installed yet, so haven't fired everything up. They're pretty inexpensive, especially if you have Prime.

Btw, to your original post, I had an electrician install a 50A subpanel to my basement (rather than running 2 circuits). I'll run a 30A 240 and 20A 110 from it. It cost $550 -- they said it generally is about $10 * #Amps, more or less. That's in Colorado, fwiw, maybe give a general ballpark at least. It was a pretty short run from my existing panel (maybe 25'?) and another friend helped get it prepped with a channel through to the basement.

My main gear will run on the 240 and I'll have that 20A if I need to add a/c or for future machines. Thanks also to all in this thread for the advice!

 



^^ hey Tom thanks for the feedback! I just tried to source some locally with no luck.. im gonna try frys tomorrow before i just grab something online..

http://www.amazon.com/dp/B00066HQ50/ref=cm_sw_su_dp

That looks great! Cheap too.. The only thing i can think of is the one that repairguy posted was 6' i think!

I can really use the distance. In fact one of my miners is about 20 feet from where the pdu is and i was thinking about daisy chaining a couple of these cords to get to it so the longer the better.

I also wanted to take his advice and get an 14AWG one at least and the one listed on amazon does not list wire gauge.

In terms of costs .. I paid close to $140 to have all the breakers on the right side of my panel swapped out since they had bad contacts and they were chared and black at the contacts and they were old discontinued breakers too. Swapped one of the ones on the left too.. That price included a new 30a dedicated breaker and doing the home-run from the panel and installing a new outlet.

So glad i didn't need a sub panel or a completely new panel. That would have ballooned the costs.



 

[grumpy619]

Good to know this is being talked about. The thread should be called "How not to burn your house down". Love it keep up the good work. Now only if someone translated everything in this thread so that a 15 year old boy could understand then I'm goodhhahaha

[DeathAndTaxes]

DeathAndTaxes!!! Nice link .. cheap too!!

Thanks for your contribution to this thread! Where is your btc tip jar..!! I wanna by ya beer!
Ill hunt you down from your site if i dont hear from you! Thanks again.

I don't need a tip (I got a coin or two in the ole wallet.dat), glad to help for free.  My miner days are likely coming to a close so I will need to mine vicariously.

<shamless plug mode>
If you absolutely feel the need to help ...  consider https://bitSimple.com next time you need to sell some coins to pay that electric bill.
</shameless plug mode>

[zedicus]

D&T!! You are a gem man! Thanks!! I will definitely check out https://bitsimple.com/

Electricity bill is due in about a week and a half..

[crazyates]

********************************************************
THE DEATH&TAXES PROTOCOL :
30A breaker, 10AWG branch line, and a NEMA L6-30R outlet (240V, 30A, locking).  Cheap used datacenter PDU with a NEMA L6-30P plug.  "Good for a solid 5.76KW."

We're looking at setting up 2-3 server racks worth of GPU rigs, and powering them all off 220. Each rack will be using ~8kW (possible more), which will be 35+A if we use 220.

So lets say we use 9kW per rack. We'll just do two of your setups? 6x 30A 220 breakers. 10ga wire run ~100ft to our room, and terminate to 6x L6-30R outlets. 2x Compaq 24A PDUs with L6-30R plugs per rack. Then each PDU will power 3 rigs, with 3 of these, and 3 of these. Each rig will use an ATX PSU, and a custom server PSU.

The problem I see is that the breaker is 30A, but is being limited by the PDU to 24A, which if run at 80% load is only ~20A. Is it a better idea to install a single 50A 220 breaker per rack, run 8awg wire to 2x L6-30P, and then run both of the 24A PDUs per rack to those? The actual draw through the PDUs wouldn't change, would still be at ~20A each, but now you've got 8awg wire carrying 40A to a 50A breaker, rather than 2x 10awg carrying 20A each to 2x 30A breakers. Does this make sense?

Although I suppose if we did that, we're really limited to 40A per rack. If we went with the 2x 30A, we could upgrade the 2x 24A PDUs with 4x 16A PDUs. As long as each of the 16A PDUs were kept below 13A, the draw per breaker would be ~25A, and the total draw per rack could be increased to 52A, or 11kW.

So if we're only pulling 8-9kW per rack, we could get away with a 50A breaker and 2x 24A PDUs? But if we wanted to pull more, splitting it up between multiple breakers would give us more headroom?

I also realize that we're going to have to run another breaker for our AC equipment, but that's a topic for another day. And I'm not really an electrician, I'm just trying to figure this all out. Any suggestions welcome!

[zedicus]

Hey crazyates! Welcome to the thread!  Sounds like you got a handful there ..

Hopefully one of the resident gurus can take a stab at your questions.. good luck!



Hopefully

Good to know this is being talked about. The thread should be called "How not to burn your house down". Love it keep up the good work. Now only if someone translated everything in this thread so that a 15 year old boy could understand then I'm goodhhahaha

If you are 15 then talk to the home owner!! This is serious ****!  Do not open your panel or attempt yourself!