Author

Topic: Electricity math (Read 1246 times)

legendary
Activity: 4116
Merit: 7849
'The right to privacy matters'
September 13, 2014, 02:02:08 PM
#4
I'm looking at a new place for the winter to house some additional mining equipment.
The owner sent me data on the current wiring and since I am terrible at the math, I need help figuring this out.

There are four 240v lines on 50a breakers.
This will support around 10,000 watts?

If I run 1000watt power supplies, and I want to run 10 miners on each line, would I be better off having individual outlets run or a PDU?



 simple math is.    240 volts x 50 = 12000 watts    


now  lets get real     one breaker fully dedicated  is 12000 watts max   for 24/7/365 running time use a 75% safety factor so 75% x 12,000 = 9000 watts

For safety, would you go actual usage on the 9000w or the power supply limit? 
Each device is at 800w on a 1000 watt power supply.

Would you calculate 9 devices, or 11 devices.

my guess is 10 at first.   close monitor the one 50 amp breaker for about a week to see if 10 is good.

 I don't think 11 will work long term.  The gear gets weird when you are just a tiny bit overloaded.  It may take 20 to 40 days to burn out.  I think that 11 pieces per breaker may be a tiny overload.
hero member
Activity: 644
Merit: 500
Inspired
September 13, 2014, 11:40:50 AM
#3
I'm looking at a new place for the winter to house some additional mining equipment.
The owner sent me data on the current wiring and since I am terrible at the math, I need help figuring this out.

There are four 240v lines on 50a breakers.
This will support around 10,000 watts?

If I run 1000watt power supplies, and I want to run 10 miners on each line, would I be better off having individual outlets run or a PDU?



 simple math is.    240 volts x 50 = 12000 watts    


now  lets get real     one breaker fully dedicated  is 12000 watts max   for 24/7/365 running time use a 75% safety factor so 75% x 12,000 = 9000 watts

For safety, would you go actual usage on the 9000w or the power supply limit? 
Each device is at 800w on a 1000 watt power supply.

Would you calculate 9 devices, or 11 devices.
legendary
Activity: 4116
Merit: 7849
'The right to privacy matters'
September 13, 2014, 09:33:08 AM
#2
I'm looking at a new place for the winter to house some additional mining equipment.
The owner sent me data on the current wiring and since I am terrible at the math, I need help figuring this out.

There are four 240v lines on 50a breakers.
This will support around 10,000 watts?

If I run 1000watt power supplies, and I want to run 10 miners on each line, would I be better off having individual outlets run or a PDU?



 simple math is.    240 volts x 50 = 12000 watts    


now  lets get real     one breaker fully dedicated  is 12000 watts max   for 24/7/365 running time use a 75% safety factor so 75% x 12,000 = 9000 watts
hero member
Activity: 644
Merit: 500
Inspired
September 13, 2014, 06:38:52 AM
#1
I'm looking at a new place for the winter to house some additional mining equipment.
The owner sent me data on the current wiring and since I am terrible at the math, I need help figuring this out.

There are four 240v lines on 50a breakers.
This will support around 10,000 watts?

If I run 1000watt power supplies, and I want to run 10 miners on each line, would I be better off having individual outlets run or a PDU?
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