Author Archives: Dr. Khuong Nguyen-Vinh

Comparison of IEC rectangular resistor symbol versus ANSI zigzag resistor symbol and inductor coils on technical engineering graph paper.
Electrical Symbols Guide 2026: IEC vs ANSI Standards (Full List)

Electrical Symbols Guide: The Engineer’s Handbook to IEC & ANSI Standards (2026) By: KTH Electric [...]

24
Jan
Extreme close-up of an N-type monocrystalline silicon solar cell texture showing anti-reflective coating and busbars under tempered glass.
Solar Panels 2026: Costs, Tech & ROI Guide (Engineer Verified)

The Ultimate Guide to Solar Panels: Technology, Costs, and Installation (2026 Edition) By KTH Electric [...]

10
Jan
A person walking barefoot on wet grass during sunset, demonstrating direct skin contact with the earth for grounding and electrical safety.
What is Earthing? Electrical Safety Guide & Standards (2025)

What is Earthing? The Ultimate Electrical Safety Guide (Definition, Types & Standards) 👤 Author: KTH [...]

18
Dec
A close-up photograph of an experienced electrical engineer using digital calipers to verify the diameter of a thick copper conductor against an AWG wire gauge chart to determine safe ampacity ratings in a workshop setting.
Wire Gauge Chart Master Guide: AWG to mm² & Amps (2025)

Wire Gauge Chart Master Guide: AWG to mm² Conversion & Ampacity Tables (2025) Expert Insight: [...]

17
Dec
A professional electrician installing a standard 120V electrical outlet receptacle, connecting hot, neutral, and ground wires according to safety codes.
How to Wire an Outlet: The Ultimate Guide & Diagrams (2025)

The Ultimate Guide to Outlet Wiring: Diagrams, Installation & Electrical Codes From standard 120V replacement [...]

17
Dec
Step-by-step mathematical derivation formula converting 1 kilowatt-hour to 3.6 Megajoules (MJ) written in an engineering notebook.
Is kWh an SI Unit? The Definitive Engineering Guide (2025)

Is kWh an SI Unit? The Definitive Engineering Guide & Calculation Formulas Bridging the gap [...]

17
Dec
Professional electrician installing 14/3 Romex cable for a three way switch wiring diagram setup during a residential renovation project with exposed wall framing.
Three Way Switch Wiring Diagram: 4 Essential Setups (2025 Guide)

Ultimate Guide: Three Way Switch Wiring Diagram & Installation (2025 Edition) Author: KTH Electric Co., [...]

17
Dec
Electric potential difference diagram showing electron charge movement through a copper conductor from high to low potential.
Electrical Voltage: The Ultimate Engineering Guide (2025)

Electrical Engineering Fundamentals Electrical Voltage: The Ultimate Engineering Guide (Definitions, Formulas, and Industrial Standards) By [...]

16
Dec
A seasoned electrical engineer analyzing a hybrid blueprint that combines traditional power transformer schematics with modern AI neural network architecture diagrams.
Transformer Diagram Decoded: A Systems Engineering Guide (2025)

The Transformer Diagram Decoded: A Deep Dive into Neural Network Architecture (2025 Guide) Meta Description: [...]

15
Dec
How to Wire a 50A – 125V – NEMA 5-50 Receptacle
How to Wire a NEMA 5-50 Receptacle (50A 125V) – [2025 Guide]

How to Install a 50A -125V Receptacle (NEMA 5-50R) with GFCI / Breaker The NEMA [...]

15
Dec
How to Wire a 30A – 250V, NEMA 6-30 Receptacle
How to Wire a NEMA 6-30 Receptacle: 30A 250V Diagram (2025)

How to Wire a 30A – 250V, NEMA 6-30 Receptacle Category: Electrical Technology How to [...]

15
Dec
How to Wire a 50A – 250V, NEMA 6-50 Receptacle
How to Wire a 50A 250V Receptacle: NEMA 6-50 & 14-50 Guide

How to Wire a 50A – 250V Receptacle (NEMA 6-50 & 14-50): The Ultimate Guide [...]

15
Dec
Comparison of #4 AWG vs #1 AWG copper wire sizes on an NEC Table 310.16 page, demonstrating the correct wire size for 100 amp breaker general load circuits versus residential service conductors.
100 Amp Breaker Wire Size & Capacity Guide (NEC 2025)

The Ultimate Guide to 100 Amp Breakers: Wire Size, Capacity, and Installation (NEC Standards) Author: [...]

14
Dec
Diode Symbols
Diode Symbols Guide: Complete List & Functions (2025)

Diode Symbols: The Complete Guide to Electronic & Electrical Schematic Symbols Category: Electrical Technology Reading [...]

14
Dec
An electrical engineer inspects High Rupturing Capacity (HRC) fuses installed in a large industrial switchgear panel to prevent catastrophic short circuit faults and electrical fires in a substation environment.
HRC Fuses Explained: High Rupturing Capacity Guide (2025)

High Rupturing Capacity (HRC) Fuses: The Ultimate Guide for Electrical Engineers & Safety Pros Author: [...]

14
Dec
Close-up of heavy-duty copper electrical wire strands symbolizing electric current flow and ampere load capacity.
Ampere (Amp) Explained: Definition, Formulas & Conversion

Ampere (Ampe) Explained: The Complete Guide to Understanding Electric Current Author: Dr. Khuong Nguyen (Vinh [...]

14
Dec
Senior electrical engineer analyzing a hand-drawn schematic diagram focusing on the polarized capacitor symbol ANSI standard versus IEC standard.
Capacitor Symbols: Complete Guide to IEC, ANSI & Polarity

Comprehensive Guide to Capacitor Symbols: IEC, ANSI, and Schematic Standards “Schematic symbols are the alphabet [...]

14
Dec
How to Wire a 20A – 125V Outlet – NEMA 5-20 Receptacle
How to Wire a 20A Outlet (NEMA 5-20): Stop! Use #12 AWG

How to Wire a 20A – 125V Outlet (NEMA 5-20): The Definitive NEC Guide Author: [...]

14
Dec
terminals of nema 6 15 receptacle wring 15a 250v outlet 2
How to Wire a NEMA 6-15 Receptacle (15A 250V): Ultimate Guide

How to Wire a 15A – 250V Outlet (NEMA 6-15): The Complete NEC Guide Author: [...]

14
Dec