Re: Question about 3 prong dryer outlet without earth.

Quote from: premanand1984 on January 29, 2018, 04:53:15 AM

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