Reference tables
The lookup tables this site's calculators read from, published so the values can be seen directly. Each one states the document it comes from.
- ElectricalConductor Ampacity TableAllowable ampacity for copper and aluminum conductors at the 60, 75, and 90 degree C columns, for not more than three current-carrying conductors at 30 degrees C ambient.
- ElectricalAmbient Temperature Correction FactorsMultipliers applied to conductor ampacity when the ambient temperature differs from 30 degrees C, by insulation temperature rating.
- ElectricalAdjustment Factors for Conductor CountAmpacity multipliers applied when more than three current-carrying conductors share a raceway or cable.
- ElectricalWire Gauge, Circular Mils, and AreaCircular mil area and approximate insulated cross-sectional area for AWG and kcmil conductor sizes.
- ElectricalThree-Phase Motor Full-Load CurrentFull-load current for three-phase induction motors by horsepower and voltage, used for sizing conductors and overcurrent devices.
- ElectricalStandard Overcurrent Device RatingsThe standard ampere ratings for fuses and inverse-time circuit breakers, used when rounding a calculated value to an available device.
- ElectricalEMT Conduit Areas and Fill LimitsInternal area of electrical metallic tubing by trade size, with the usable area at the 53, 31, and 40 percent fill limits.
- PLC & DataPLC Data Type RangesBit width and value range for the IEC 61131-3 elementary data types, with the practical notes that matter in controller programming.
- Instrumentation4-20 mA Signal ReferenceCurrent, percent of span, and voltage across a 250 ohm input for a 4-20 mA loop, including the NAMUR fault thresholds.
- Control PanelsEnclosure Type RatingsWhat each enclosure type rating protects against, and where each is normally used in controls work.
- ConversionsControls Unit Conversion ReferenceThe conversions that come up constantly in controls and water work: pressure, flow, level, power, and temperature.
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