Author

Topic: Small Farm Electrical (Read 287 times)

legendary
Activity: 1498
Merit: 1030
January 01, 2018, 05:10:32 PM
#9
That Sentry PDU has a basic 30 amp capacity rating, so the 24 amps would be the "continuous" safe rating.

 NEVER calculate wattage at 240/120 volts - it is VERY VERY RARE that you will see that high of a voltage at an outlet, in fact I have NEVER seen it get that high (my current location is the current record holder, it gets up to 238.5/119.3 or so sometimes on short-term spikes).

 Many areas in the US only deliver 223/111.5 VAC ballpark at the outlet, and the NOMINAL is only 234/117 VAC for the US electrical system as a whole - and that's not factoring in brownouts in some areas.

 Calculate wattage at 220/110 is MUCH safer.

hero member
Activity: 630
Merit: 502
December 31, 2017, 11:49:44 PM
#8
Is there a cheaper option than that one from Tripp Lite?
hero member
Activity: 630
Merit: 502
December 31, 2017, 08:43:23 PM
#7
Or is 24A the max and 80% of that is 19A? This is rated for 30A so 80% is 24A:

https://www.ebay.com/itm/Tripp-Lite-PDU-Basic-240V-30A-38-Outlet/272935963989
hero member
Activity: 630
Merit: 502
December 31, 2017, 08:27:28 PM
#6
on 1 30A 208/240 Circuit, yes that will work.

Calculate like this

watts / voltage = Amps

1300 / 240 = 5.4A
240V * 24A = 5760W so power draw should be within limit. I was wondering about this PDU specifically and what does Quad/Octet mean.


sr. member
Activity: 847
Merit: 383
December 31, 2017, 08:16:57 PM
#5
on 1 30A 208/240 Circuit, yes that will work.

Calculate like this

watts / voltage = Amps

1300 / 240 = 5.4A
hero member
Activity: 630
Merit: 502
hero member
Activity: 630
Merit: 502
December 31, 2017, 02:14:00 PM
#3
If you are in the US then circuits and PDUs are rated at 80% for continuous use, so a 30A circuit or PDU can only handle 24A continuously.  
Yes, 24 1080Ti or 36 1070Ti should draw around 5000-5500W with undervolting.
newbie
Activity: 1
Merit: 0
December 31, 2017, 02:08:16 PM
#2
If you are in the US then circuits and PDUs are rated at 80% for continuous use, so a 30A circuit or PDU can only handle 24A continuously. 
hero member
Activity: 630
Merit: 502
December 31, 2017, 02:00:30 PM
#1
Deleted.
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