Electrical Reference Tables: kVA to Amps, AWG, Fuel and Breakers
Quick-lookup tables for the values electrical work needs again and again. Every figure is computed from a stated formula or taken from a named standard, each table explains its assumptions with a worked example, and every table can be printed or saved as a PNG image.
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Reference tables
- kVA to Amps Chart (230, 400, 415 and 480 V)Printable chart of full-load current for common kVA ratings from 5 to 2500 kVA at 230 V single-phase and 400, 415 and 480 V three-phase, computed from I = S/(√3·V).
- AWG to mm² Conversion Table (with kcmil)AWG 18 to 4/0 and 250 to 1000 kcmil converted to mm² from the exact AWG diameter formula, with the nearest IEC 60228 metric size for each.
- Diesel Generator Fuel Consumption Chart (20–1000 kVA)Estimated diesel use in litres per hour for 20 to 1000 kVA generators at 25, 50, 75 and 100 % load, from a stated part-load curve and 0.24 L/kWh at full load.
- Standard Circuit Breaker Ratings (MCB and MCCB)The preferred rated currents for MCBs in IEC 60898-1, the common MCCB ratings offered by manufacturers, and the B, C and D instantaneous trip ranges.
Fuel consumption by generator size
Litres per hour at 25, 50, 75 and 100 % load, litres per kWh, US gallons, daily totals and the runtime of an example tank for each set.
Full-load current by transformer size
Rated current at 400, 415 and 433 V and at 6.6, 11 and 33 kV, with a worked example and what the figure is used for.