Mining Power Consumption Calculator

Work out how much power your mining machines draw and whether your supply can carry it: the load, the current, the machines per breaker, the heat to remove and your sanctioned load.

Your machines

At the wall, from its rating.

Your supply

Mining power supplies: 0.95 to 0.99.

Optional: one circuit’s MCB.

Optional: from your electricity bill.

Your power draw

Enter the power of your machines and your supply, then choose Calculate. Your figures appear here.

Current

0 A

Amps from the supply

Machines per Breaker

Not set

Enter the breaker rating

Energy a Day

0 kWh

Units a month and a year

Heat to Remove

0 BTU/h

And tons of cooling

Sanctioned Load

Not set

Enter it from your bill

Total Load

0 kW

All your machines together

A guide for planning, not a wiring design: have a licensed electrician size the breakers, cables and earthing, and check the load with your electricity board. Real draw varies with temperature and settings. To work out the bill, use the Mining Electricity Cost Calculator.

How it is calculated

Machines are rated in watts at the wall. The current they pull depends on the supply voltage and the power factor, and almost every watt they use ends up as heat in the room.

  • Load = watts per machine × machines, in kW; kVA = kW ÷ power factor
  • Current, single-phase = watts ÷ (230 V × power factor)
  • Current, three-phase = watts ÷ (√3 × 415 V × power factor), on each phase
  • Machines per breaker = whole machines within 80% of the breaker’s rating, a common margin for loads that run for hours
  • Energy = load × hours a day, in kWh
  • Heat = watts × 3.412, in BTU an hour; ÷ 12,000 for tons of cooling

Frequently asked questions

Short answers on the power that mining machines draw.

How much power your machines draw and whether the supply can carry it. Take two machines of 3,500 W on a 230 V single-phase supply with a power factor of 0.99. Together they draw 7 kW, or 7.07 kVA, and pull 30.74 A. A 32 A breaker can carry only one of them at 80% of its rating, so each needs its own circuit. They use 168 kWh a day and give off about 23,884 BTU of heat an hour, close to 2 tons of cooling.

Most homes in India have a 230 V single-phase supply, which suits one or two machines. A 415 V three-phase supply spreads the load over three wires, so each carries far less current: the same 7 kW draws about 9.84 A a phase instead of 30.74 A. Several machines usually need three-phase, which you apply for from your electricity board.

It is the load your electricity connection is approved for, in kW, shown on your bill. Running more than it can bring penalties, higher demand charges or a tripped supply, and the board may ask you to raise it. Enter it to check: in the example, 7 kW fits within a 10 kW sanctioned load, with 3 kW to spare.

Mining machines run at full power day and night. A breaker and its wiring carrying their full rating for hours get hot, so electricians keep continuous loads to about 80% of the rating. A 32 A breaker on 230 V then carries about 5,829 W, enough for one 3,500 W machine but not two. Your electrician will size the breaker and cable for your installation.

Nearly all the power a machine draws becomes heat: 1 W is about 3.412 BTU an hour, and one ton of air conditioning removes 12,000 BTU an hour. Two 3,500 W machines need close to 2 tons, and the air conditioning adds its own power, which you can count as cooling load on the Mining Electricity Cost Calculator.

The share of the power drawn from the supply that does useful work. Mining power supplies are close to 1, usually 0.95 to 0.99 at full load. A lower power factor means more current, and more kVA, for the same watts, which matters for wiring and for connections billed in kVA.

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