PDU amp question

[95do]

Hello if a PDU is rated for 20A at 220v and each rig is pulling say 9 amps then you can only run 2 rigs on 1 PDU before it trips?

[philipma1957]

Hello if a PDU is rated for 20A at 220v and each rig is pulling say 9 amps then you can only run 2 rigs on 1 PDU before it trips?

Maybe

But a 9 amp rig is a beast.  So is it like a 10 gpu rig ?

9 x 220 is about 1980 watts.

But 220 in the USA can run up to 240. So. 9 x 240 is 2160 watts.

So  your rigs could get 1980 to 2160 watts as your volts vary.

I run 238 to 243 volts year round

[NobodyIsHome]

You should keep your power draw at or below 80% of the max rating of the PDU output.  Technically, you could run more than that, however, they are not meant to sustain those loads without creating a heat problem.

I have a number of circuits at 80% (~16A @ 120V) and the metal conduit for the wiring gets really warm to the touch.

[95do]

Hello if a PDU is rated for 20A at 220v and each rig is pulling say 9 amps then you can only run 2 rigs on 1 PDU before it trips?

Maybe

But a 9 amp rig is a beast.  So is it like a 10 gpu rig ?

9 x 220 is about 1980 watts.

But 220 in the USA can run up to 240. So. 9 x 240 is 2160 watts.

So  your rigs could get 1980 to 2160 watts as your volts vary.

I run 238 to 243 volts year round

6 x 1070 GTX FTW cards with 2 power supplies pulls 9.1A and 1100 watts on a 120v/15a circuit using the kill a watt meter

I have a 30a circuit and 60a circuit and would like to switch the rigs to run on those but lower priced PDUs mostly only do 20A so I was confused what you guys are doing to run many rigs on one pdu

[philipma1957]

Hello if a PDU is rated for 20A at 220v and each rig is pulling say 9 amps then you can only run 2 rigs on 1 PDU before it trips?

Maybe

But a 9 amp rig is a beast.  So is it like a 10 gpu rig ?

9 x 220 is about 1980 watts.

But 220 in the USA can run up to 240. So. 9 x 240 is 2160 watts.

So  your rigs could get 1980 to 2160 watts as your volts vary.

I run 238 to 243 volts year round

6 x 1070 GTX FTW cards with 2 power supplies pulls 9.1A and 1100 watts on a 120v/15a circuit using the kill a watt meter

I have a 30a circuit and 60a circuit and would like to switch the rigs to run on those but lower priced PDUs mostly only do 20A so I was confused what you guys are doing to run many rigs on one pdu

okay  a 30amp pdu  like this


http://www.ebay.com/itm/Genuine-HP-EO4501-Server-Power-Distribution-Module-228481-002/232449268221?


has 4 sockets    

it is rated at 24 amps internally to protect your  30 amp circuit breaker.   that complies with  the 80% derating.   it is a cheap price for good used gear



it can run 4 of these  psu's  at 1300 watt draw each


http://www.parallelminer.com/product/2400-watt-power-supply-kit-for-gpu-mining-94-efficiency-200-240v-up-to-24-gpu/

 buy 4 of these
https://www.monoprice.com/product?p_id=24206


buy 4 of these pico psu's

https://bitcointalk.org/index.php?topic=2040729.msg20802414#msg20802414



this setup above will do 4x  1300 watt rigs  safely on a 30 amp  220/240 breaker  with an  l6-30r

http://www.ebay.com/itm/Pass-Seymour-locking-receptacle-L6-30R-MADE-IN-U-S-A-30-amp-250V-twist-lock-/390917364485?




and the 30 amp circuit breaker for 240 volts  needs to use 10 gauge wire to that  l6-30r   



cost for all above is about


50-60   pdu
420      psu's    oh use   code slush  for 5% off
 20      power cords   
 10      l6-30r
100     for the pico psu's

about  600  bucks    to run   24 gpus on four 6 card rigs.


don't cheap out all the shit above works is tested and should work for years.

[95do]

^this is such helpful info  thank you very much  

[philipma1957]

^this is such helpful info  thank you very much  

Good I glad I could help you.

If you buy the psus do not forget the code