How To
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How to Wire a 15A – 125V Outlet – NEMA 5-15 Receptacle
How to Install a Standard 15A – 125V Receptacle (NEMA 5-15) with Breaker and GFCI Protection A standard 15A, 120V receptacle outlet is a common electrical fixture used in North…
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How to Size a Breaker and Wires in AWG with EGC for Load?
Proper Sizing of Breakers and Wires in AWG with Equipment Grounding Conductor (EGC) for Branch Circuits – Based on Load Current, Wattage, and Supply Voltage in Single-Phase and Three-Phase Systems…
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LED Light Bulb Circuit – 230V / 120V Mains Operated LEDs
120V / 230V AC Mains Operated LED Light Bulb Circuit Diagram – Components, and Operation Years ago, lighting applications relied on incandescent filament lamps, compact fluorescent lamps (CFLs), and fluorescent…
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Part 14 – How to Size Star-Delta Starter for Motors?
Sizing a Star-Delta Starter with Contactors for a 3-Phase Motor A Star-Delta starter is used to reduce the inrush current when starting large three phase motors. The starting current of…
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Part 13 – How to Size DOL Starter for Three-Phase Motors?
Sizing Direct-On-Line Starter with Contactor, Fuse, Circuit Breaker and Overload Relay for 3-Phase Motors – NEC & IEC DOL Starter A DOL starter (also known as Direct-On-Line or across the…
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Part 12 – Sizing Motor Starter & Contactor – NEMA – NEC
How to Size a Motor Starter, Contactor and Controller? NEMA – NEC Motor starters and controllers are a combination of devices in a single unit to safely start, run and…
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Part 11 – Sizing Disconnecting Means for Motor & Controller
How to Size Disconnecting Switch, Fuse & Breaker for Motors and Controllers Disconnecting Means for Motors & Controllers Although we know that the motor disconnecting means can be sized based…
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Part 10 – Overcurrent Protection for Motor Control Circuits
How to Size Short Circuit and Overload Protective Devices for Motor Control Circuit Conductors? According to 430.75(A), motor control circuit must have a disconnect. If the motor control circuit conductors…
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Part 9 – Sizing Motor Overload Protection and OCPDs
How to Size Overload Protection for 3-Phase Motors? NEC Article 430, Part III provides guidelines for sizing overload protection devices such as, overload relays, fuses and circuit breakers for motor…
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Part 8 – Sizing Motor Feeder Protection and OCPD’s Devices
How to Determine the Size of Feeder Protection Supplying Several Motors? In the previous section, we discussed sizing feeder conductors for multiple motors. This section will explain the step-by-step process…
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