Question about 3 prong dryer outlet without earth.

[premanand1984]

Guys, I have only 1 250V outlet in my townhome (rented). Planning to use it for mining, to connect 2 A3's, 1 S9 and 1L3+.

Dryer outlet is a 10-30R, similar to the one in the link below (just that the L shape on the top). I understand this old 3 prong does not come with earth but with neutral.

https://www.homedepot.com/p/Pass-and-Seymour-30-Amp-125-250-Volt-NEMA-10-30R-Flush-Mount-Power-Outlet-Black-3860CC6/205493510

I have ordered a adapter to make it more convenient for connecting antminer/PDU's.

https://www.amazon.com/gp/product/B0748NBCGH/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1.


Question here is, Considering the dryer does not have earth, will it work with this adapter ? First I will connect and run just 1 antminer to see how it behaves and later point of time, will buy a PDU and connect all 4 to it. Please check and advice. Thanks.

[1715150739]

1715150739

[philipma1957]

Guys, I have only 1 250V outlet in my townhome (rented). Planning to use it for mining, to connect 2 A3's, 1 S9 and 1L3+.

Dryer outlet is a 10-30R, similar to the one in the link below (just that the L shape on the top). I understand this old 3 prong does not come with earth but with neutral.

https://www.homedepot.com/p/Pass-and-Seymour-30-Amp-125-250-Volt-NEMA-10-30R-Flush-Mount-Power-Outlet-Black-3860CC6/205493510

I have ordered a adapter to make it more convenient for connecting antminer/PDU's.

https://www.amazon.com/gp/product/B0748NBCGH/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1.


Question here is, Considering the dryer does not have earth, will it work with this adapter ? First I will connect and run just 1 antminer to see how it behaves and later point of time, will buy a PDU and connect all 4 to it. Please check and advice. Thanks.

WTF  should have earth and no neutral

not neutral and no earth.

H  H
  G

buy a dmm from home depot

test HH  you should get about 220-240


teat 1 H to 1 G

you should get  110-120

test the other 1H to 1 G  you should get 110-120

if those numbers do not show on you meter call an electrician

here is a digital multimeter DMM

https://www.homedepot.com/p/Digital-Multimeter-MT-1210/206304336

so that is your receptecle  in the wall

        L
     \     /           



         L   is a ground

     \     /       these are 2 hot lines each is 110/120 


 when  you meter \   /    220-240


when you meter    L
                          \        110-120

when you meter  L
                            /     110-120


Do you  understand?  220 -240  is way more powerful then 110 -120  be very careful

[jeecom]

I recommend getting a licensed electrician to look at it or run the power you need.   I would never risk my home with potentially faulty or dangerous wiring.

[premanand1984]

Guys, I have only 1 250V outlet in my townhome (rented). Planning to use it for mining, to connect 2 A3's, 1 S9 and 1L3+.

Dryer outlet is a 10-30R, similar to the one in the link below (just that the L shape on the top). I understand this old 3 prong does not come with earth but with neutral.

https://www.homedepot.com/p/Pass-and-Seymour-30-Amp-125-250-Volt-NEMA-10-30R-Flush-Mount-Power-Outlet-Black-3860CC6/205493510

I have ordered a adapter to make it more convenient for connecting antminer/PDU's.

https://www.amazon.com/gp/product/B0748NBCGH/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1.


Question here is, Considering the dryer does not have earth, will it work with this adapter ? First I will connect and run just 1 antminer to see how it behaves and later point of time, will buy a PDU and connect all 4 to it. Please check and advice. Thanks.

WTF  should have earth and no neutral

not neutral and no earth.

H  H
  G

buy a dmm from home depot

test HH  you should get about 220-240


teat 1 H to 1 G

you should get  110-120

test the other 1H to 1 G  you should get 110-120

if those numbers do not show on you meter call an electrician

here is a digital multimeter DMM

https://www.homedepot.com/p/Digital-Multimeter-MT-1210/206304336

so that is your receptecle  in the wall

        L
     \     /           



         L   is a ground

     \     /       these are 2 hot lines each is 110/120 


 when  you meter \   /    220-240


when you meter    L
                          \        110-120

when you meter  L
                            /     110-120


Do you  understand?  220 -240  is way more powerful then 110 -120  be very careful

Absolutely, I totally understand only because you have used lay man terms lol. Please take a look about the "L" only being a neutral in the link below. 


http://www.generatorsforhomeuse.us/connect-generator-to-home/


Will try to get a DMM today and post the results. Thanks for the detailed explanation. Appreciate it.

[eissug]

That link is about hot wiring a generator into an electrical system and they are just telling you how to do it when all you have is a 3 prong outlet.  Neutral and ground are bonded together so this "works"...but according to code the grounding conductor can be significantly smaller than a neutral is allowed to be.  Lots of electricians run around after a storm charging people a couple hundred for a dangerous extension cord and hopefully good instructions.

Once you get all that stuff wired up check temperatures of your breaker panel and outlet.  There is a good chance there is some ~6ga AL behind there and the screws could be loosening up.  Miners running at 30A will heat wiring and electrical components more than an oven or dryer due to the continuous load.

[philipma1957]

That link is about hot wiring a generator into an electrical system and they are just telling you how to do it when all you have is a 3 prong outlet.  Neutral and ground are bonded together so this "works"...but according to code the grounding conductor can be significantly smaller than a neutral is allowed to be.  Lots of electricians run around after a storm charging people a couple hundred for a dangerous extension cord and hopefully good instructions.

Once you get all that stuff wired up check temperatures of your breaker panel and outlet.  There is a good chance there is some ~6ga AL behind there and the screws could be loosening up.  Miners running at 30A will heat wiring and electrical components more than an oven or dryer due to the continuous load.

good point  my home was built in 1971.

The war with Vietnam / China   caused a USA  copper shortage  my home had all AL wiring.   many homes built  from 1967 to 1974 across the USA have AL wiring  and it caused many fires.

Living in the great state of New Jersey  a homeowner is allowed to wire their own home  on his own as long as he lives in it and does not rent it.

So I purchased my house in  1992  knowing I would replace all the AL wires on my own.  I replaced  everyone  above code.
 My house has 12ga 10ga and 6ga copper throughout.  I did it all except for the 150 amp box. I hired a licensed ELECTRICIAN for that part.

 So when mining came along I knew my wires were good.