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- Allowable Ampacities Insulated Conductors (In a Raceway)
- Approximate Full Load Amperes 3 Phase AC Motors
- Common Conversion Factors
- Conduit Fill Chart
- Direct Current Motor Full Load Current
- Electrical Formulas
- Full Load Current in Amperes - Single Phase
- Full Load Current in Amperes in 3 Phase
- Full Load Formula
- NEMA Locking Blade Configurations Chart
- NEMA Straight Blade Configurations Chart
- Ohm's Law
- Tempurature Conversion Chart

Resources : Electrical Formulas

To Find | Direct Current | Alternating Current | ||

Single Phase | Two-Phase* Four-Wire | Three Phase | ||

Amperes when Horsepower is known | HP x 746 | HP x 746 | HP x 746 | HP x 746 |

E x EFF | E x EFF x PF x 2 | 2 x E x EFF x PF | E x EFF x PF x 1.73 | |

Amperes when Kilowatts are known | KW x 1000 | KW x 1000 | KW x 1000 | KW x 1000 |

E | E x PF | 2 x E x PF | E x PF x 1.73 | |

Amperes when "KVA" is known | KVA x 1000 | KVA x 1000 | KVA x 1000 | |

E | E x 1.73 | |||

Kilowatts | E x I | E x I x PF | I x E x 2 x PF | E x I x 1.73 x PF |

1000 | 1000 | 1000 | 1000 | |

Kilovolt-Amperes "KVA" | I x E | I x E x 2 | E x I x 1.73 | |

1000 | 1000 | 1000 | ||

Horsepower (Output) | E x I x EFF | E x I x EFF x PF | I x E x 2 x EFF x PF | E x I x EFF x PF x 1.73 |

746 | 746 | 746 | 746 | |

E = VoltageI = AmpsPF = Power FactorEFF = EfficiencyHP = Horsepower |

Note: Direct current formulas do not use (PF, 2, or 1.73)

Single phase formulas do not use (2 or 1.73)

Two phase-four wire formulas do not use (1.73)

Three phase formulas do not use (2)

* For three-wire, two phase circuits the current in the common conductor is 1.41 times that in either of the other two conductors.

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