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Author Topic: 240v Garage Setup Electrical Help  (Read 240 times)
kano
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October 30, 2021, 02:46:37 AM
 #21

The original post says 3000W to 3600W

A max 15A Y PSU cable on 3600W will be 240V
i.e. max spec ... you better hope cheap 14AWG, 15A, $7 cables are not cheap cables ...

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October 30, 2021, 03:05:13 AM
 #22

The original post says 3000W to 3600W

A max 15A Y PSU cable on 3600W will be 240V
i.e. max spec ... you better hope cheap 14AWG, 15A, $7 cables are not cheap cables ...

the ones i linked to mono price work well.

and the part that plugs into the c19 cable is 12 ga it splits into two 14 ga that are c13 ended the two psu each draw 1800 watts max.

we have run 17 s17 on turbo along with a few s17+ and a few s19

no melted wires. we have three 200 amp panels and 24 circuits.  yeah in theory the 200 amp breakers would over load but we do not do over 20 amps on any circuit.

so 8 x 20 = 160 amps on a 200 amp panel..

this room can overheat in the summer so we tend to down clock in the summer and run the s17s on low

then jump to turbo in the winter.


but if you use the y splitter make sure they are from monoprice as they work up to 3600 watts 24/7


now for some reason you have 14/2 romex that is not good for a 30 amp circuit

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du5tin
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October 30, 2021, 02:07:47 PM
Merited by wndsnb (2)
 #23

If you have an electrician friend just let them get all the equipment for you. Be plain about what the end result should be, “I want 10, 30A 240V circuits with receptacles or junction boxes to connect these ten miners.” They should be able to get the right parts for you and often from a distributor with competitive pricing.

A few things with residential services. The power company won’t hook up a 200A panel to 100A service so be sure you can get 200A service before you buy a big panel board. I would also get a physically larger panel too, that way you can install the breakers with a space between them (for cooling) or have room for extra breakers for future.

Quick electrical lesson: breakers are there to protect the wire and not the load. The size of the load (your miner, approx 3000W) dictates the size of the wire (3000W/240V=12.5A, adjust for continuous running; 12.5A/0.8=15.6A so 12 gauge wire minimum) which then directs the size of breaker (12 gauge ampacity is 20A so 20A breaker).

The voltage references can seem a bit confusing. Standard system voltages in North America have some variance. Single phase residential is often 220-240V. I think it also goes back to older electrical standards. Things rated a few decades ago reference 220V or 230V a lot. Most newer standards reference 240V. Long story short is that your power at your place will be in this range, leaning closer to 240V likely. Your power company might be able to adjust your voltage up or down a bit at the transformer using winding taps if you are finding it too low (less than 220V).

Pro tip: you can avoid the cost of larger receptacles by direct splicing the miner cables to the circuit wires. Just cut off the male end, strip back the cable a bit, use a tester to find the ground and power carrying wires in the cable and splice it all in a junction box. It’s more work overall and the cables become fixed to one location but this can save a bit of money. Your electrician friend will be able to help get this right. And definitely get it right because weird things can happen if some wires are accidentally crossed.

PDU is probably not required. They can add value though if you get one with power monitoring and smart switching. If you don’t want to go with a receptacle per miner route or use junction boxes to hook the miners up a PDU is a nice prebuilt way of splitting larger power up to multiple devices. A 30A 240V PDU is only going to be able to power a couple miners though so the added cost might not be worth the benefit if you have to buy a bunch of PDUs.
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October 31, 2021, 02:59:01 PM
 #24

If you have an electrician friend just let them get all the equipment for you. Be plain about what the end result should be, “I want 10, 30A 240V circuits with receptacles or junction boxes to connect these ten miners.” They should be able to get the right parts for you and often from a distributor with competitive pricing.

A few things with residential services. The power company won’t hook up a 200A panel to 100A service so be sure you can get 200A service before you buy a big panel board. I would also get a physically larger panel too, that way you can install the breakers with a space between them (for cooling) or have room for extra breakers for future.

Quick electrical lesson: breakers are there to protect the wire and not the load. The size of the load (your miner, approx 3000W) dictates the size of the wire (3000W/240V=12.5A, adjust for continuous running; 12.5A/0.8=15.6A so 12 gauge wire minimum) which then directs the size of breaker (12 gauge ampacity is 20A so 20A breaker).

The voltage references can seem a bit confusing. Standard system voltages in North America have some variance. Single phase residential is often 220-240V. I think it also goes back to older electrical standards. Things rated a few decades ago reference 220V or 230V a lot. Most newer standards reference 240V. Long story short is that your power at your place will be in this range, leaning closer to 240V likely. Your power company might be able to adjust your voltage up or down a bit at the transformer using winding taps if you are finding it too low (less than 220V).

Pro tip: you can avoid the cost of larger receptacles by direct splicing the miner cables to the circuit wires. Just cut off the male end, strip back the cable a bit, use a tester to find the ground and power carrying wires in the cable and splice it all in a junction box. It’s more work overall and the cables become fixed to one location but this can save a bit of money. Your electrician friend will be able to help get this right. And definitely get it right because weird things can happen if some wires are accidentally crossed.

PDU is probably not required. They can add value though if you get one with power monitoring and smart switching. If you don’t want to go with a receptacle per miner route or use junction boxes to hook the miners up a PDU is a nice prebuilt way of splitting larger power up to multiple devices. A 30A 240V PDU is only going to be able to power a couple miners though so the added cost might not be worth the benefit if you have to buy a bunch of PDUs.

the cheapest 30a 240v pdu  used is this:

https://www.ebay.com/itm/143399400162?

the plug is l6-30p  it has 4 breakers for the 4 c19/c20 jacks and a main breaker

it can do 2 s17 on low setting
it can do 2 s17 on normal setting
it can not do 2 s17 on turbo setting

if you buy them look for these wires to run to the s17 psu

https://www.ebay.com/itm/184114573116?


we went away from this setting due to our power having long brown out dips to 188-195 volts. when this happens the pdu would trip

but it is viable way to run s17 gear or even s19 gear

s19 will be 1 unit per pdu.

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October 31, 2021, 10:00:43 PM
Last edit: October 31, 2021, 10:17:56 PM by usrzero01
 #25

Thanks, guys. I like to be cheap, love it. But I would rather spend extra money and get good stuff, If I could get a pdu that can handle 4-5 machines or 10 machines for around $1k. I been looking but, im not sure about everything, being green and all, asking a questions is best way i learn after book reading, (I could ask my buddy, but when he opens his mouth he likes a beer going down it, and I'm interrupting his "drinking" schedule already.) And Quote: .......Wait, Mining, on a Farm, in your Garage, WTF are you talking about!!!)

I see monitored, metered and smart, smart switching, pdus what the difference, which is the best? Would be nice to have way to check power and not have to be in garage. But i do have some money too not go the cheapest route, I could spend between $500-1200 on pdus. Now C20 to C13 splitter will be find on pdus?

I'm searching for: 30a smart 240v pdu, with c19 outlets.

Thanks again....
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November 01, 2021, 01:52:28 AM
 #26

Okay, stuff is clicking.... SO if i wanted 4 machines on one pdu it would need to be 60amp pdu, would need wire that could handle 60amp, and 60 amp breaker, outlet, etc....?
If i have a 100amp transformer on the pole that is going to define how many machines I could have running, six? I seen someone say, with and 100amp transformer you can use 40,000 watts, seemingly could run 10 machine at 3000/3600watts? The psu determines your calculations, doesnt matter what power your machine is using, it's what power the psu can handle?

Well, i got down how to setup the electrical system with outlets for each machine... I think I will go with 2, smart/intelligent/metered pdus. That should be able to handle 2 machines each? And go from there, let my learning curve catch up..... Thanks for you time all....
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November 01, 2021, 02:06:33 AM
 #27

Power transformers are not rated in amps - they are rated in kva (loosely translates to kw) and the rating will be marked on the side of it. If too far away, use a pair of binoculars to to see the rating. Also remember that the transformer is feeding all your close neighbors so you do not get to use all of what can produce...

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November 02, 2021, 02:37:31 AM
 #28

I meant 100 or 200 amp breaker on transformer. Anyways, I called the EC cause they had to reschedule installation because of storms, and the lady said you can install up to 400amp breaker panel, so....... I'ma just wait till the lineman comes out here and tells me exactly what is what, cause i cant see anything on the transformer....  

Ahhhh, I found people that LOVE to answer my questions about PDU setups......Power Supply Salesmen, lol!!!

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