Category Archives: Knowledge

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
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
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
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
3D visual representation of the Electrical Power Triangle on a workbench, illustrating the trigonometric relationship between Active Power (P), Reactive Power (Q), and Apparent Power (S) with phase angle theta.
Active vs Reactive Power Explained: Formulas & The “Beer Analogy”

Active, Reactive, Apparent, and Complex Power: A Comprehensive Guide Part 1: The Three Pillars of [...]

12
Dec
How to Test a Capacitor with a Multimeter (3 Safe Ways)
How to Test a Capacitor with a Multimeter (3 Safe Ways)

3 Ways to Test a Capacitor: Accurate & Safe Methods (2025 Guide) Quick Summary: To [...]

12
Dec
Top 60+ Electrical Engineering Interview Questions & Answers [2025 Edition]
Top 60+ Electrical Engineering Interview Questions & Answers [2025 Edition]

60+ Electrical Engineering Interview Questions & Answers Comprehensive Guide for 2025 | Part 1: Basics, [...]

11
Dec
Top 7 Essential Books for Electricians & Apprentices (NEC 2023/2025 Guide)
Top 7 Essential Books for Electricians & Apprentices (NEC 2023/2025 Guide)

⚡️ TOP 7 ESSENTIAL BOOKS & GUIDES FOR ELECTRICIANS AND APPRENTICES (2025 EDITION) Disclaimer: Expertise [...]

11
Dec
How to Wire a NEMA 14-20 Receptacle: 20A 125/250V Guide [NEC]
How to Wire a NEMA 14-20 Receptacle: 20A 125/250V Guide [NEC]

How to Wire a NEMA 14-20 Receptacle The Definitive Expert Guide to 20A, 125V/250V Installations [...]

11
Dec
Close-up of the NEMA TT-30R 30A 125V receptacle face, featuring the distinct 3-prong configuration designed for RVs and Travel Trailers to distinguish it from 240V outlets.
Wiring NEMA TT-30 RV Outlet: The Ultimate 30A 120V Guide [2025]

Electrical Technology | 16-20 phút How to Wire NEMA TT-30 Receptacle for RVs & Travel [...]

10
Dec
Close-up of NH-type High Rupturing Capacity (HRC) fuse with ceramic body and silver-plated contacts for industrial short-circuit protection.
HRC Fuse, Short circuit protection, HRC fuse selection, IEC 60269.

High Rupturing Capacity (HRC) Fuses: The Definitive Engineering Guide (2025) By KTH Electric Engineering Team [...]

04
Dec
What is a Receptacle?
Socket vs. Outlet vs. Receptacle: The Definitive NEC Guide

Difference Between Socket, Outlet, and Receptacle: The Definitive Technical Guide While often used interchangeably in [...]

04
Dec
Thi công điện văn phòng trọn gói với hệ thống sàn nâng và ổ cắm âm sàn floor box thẩm mỹ.
Office Electrical Fit-out Vietnam: 2025 BOQ & Cost Guide

OFFICE ELECTRICAL FIT-OUT: RAISED FLOORS, LAN SYSTEMS & DETAILED COST ESTIMATES (BOQ) 2025 Are you [...]

25
Nov
You need to know about circuit breakers and isolating switches 1024x683 1
Circuit Breaker vs. Isolating Switch: Key Differences & Safety Guide

Circuit Breaker vs. Isolating Switch: Key Differences & Safety Guide (2025) Quick Answer: A Circuit [...]

23
Nov
Màn hình biến tần Growatt báo đèn đỏ và hiển thị mã lỗi Error 203 thực tế.
Growatt Inverter Error Codes Table & Comprehensive Repair Guide (2025 Update)

Amidst the explosive growth of the renewable energy sector in Vietnam, Growatt has solidified its [...]

23
Nov
Recloser tự động đóng lại trên cột điện
Recloser Classification 2025: Interrupting Mediums & Controls

TECHNICAL GUIDE: RECLOSER CLASSIFICATION BY INTERRUPTING MEDIUM & CONTROLS (2025) To effectively select and operate [...]

12
Nov
Biểu đồ đường cong ngắt rơ le quá tải
Overload Relays and Trip Curves: A Comprehensive Guide

Overload relays are critical protective devices in any industrial electrical system, playing a key role [...]

06
Nov