About Azad Circuit Hub
Standards-based calculators, guides, and independently researched tool reviews for engineers, electricians, and homeowners.
Azad Circuit Hub is a technical resource built for electrical engineers, electricians, students, and homeowners who need answers grounded in real standards, not guesswork. We publish standards-based calculators, step-by-step guides, and independently researched tool reviews covering everything from busbar sizing to EV charger installation. With more than 2,400 published articles and 250+ tool and product reviews, it has grown into a large reference library for the electrical trades.
Abdul Wassay
Electrical Engineer, 15+ Years in Industry & EPC Projects
Abdul Wassay is an electrical engineer with over 15 years of experience across industrial electrical systems, EPC (Engineering, Procurement, and Construction) projects, and renewable energy installations. His background spans PLC and SCADA programming, industrial automation, electrical troubleshooting, and power system protection — hands-on experience from live panels, switchgear, and control systems, not just textbook theory.
That field background is why our calculators cite real code (NEC, IEC, IEEE) instead of simplified rules of thumb, and why our tool reviews are written from a working engineer's perspective on reliability and safety, not just spec-sheet comparisons.
Read the full author profile →What You'll Find on Azad Circuit Hub
Independent Tool Reviews
250+ researched reviews and buying guides for the tools engineers and electricians rely on.
Solar & Energy Product Reviews
Charge controllers, solar kits, EV chargers, and energy monitors, reviewed with sizing and wiring in mind.
Home Wiring & Safety Testing
Practical guides for checking outlets, wiring, and connections safely.
Electrical Testing & Insulation
100+ guides on test methods, insulation testing, and equipment diagnostics.
Busbar Sizing & Clearance
IEC and NEC compliant sizing for panel and switchgear design.
Relay Protection Settings
Coordination calculators for the most common protection schemes.
Cable, Conduit & Earthing
NEC and IEC-cited sizing for conductors, trays, and grounding systems.
Electrical Standards
250+ guides to IEC, NEC, IEEE, and AS/NZS requirements, explained with examples.
Utility Bill Estimators
Matched to real regional tariff structures, not flat national averages.
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Calculators & Tools
130+ free calculators for cables, motors, solar, and power distribution.
Applied Engineering Topics
In-depth guides on the systems that power homes and industry.
Electronics & Pinouts
Pinouts, datasheets, and circuit guides for common components and boards.
Concepts & Circuit Theory
The fundamentals behind the calculators above, explained with worked examples.
Careers, Courses & Industry
Salary guides, training courses, and company lists for electrical professionals.
Free Excel & PDF Downloads
Ready-to-use design tables and spreadsheets for everyday engineering work.
Our Editorial Standards
Every calculator and guide on Azad Circuit Hub is checked against NEC, IEC, or IEEE code where applicable, and written to be usable by someone working under real time pressure — not just a student studying for an exam. Where standards differ by region (IEC vs. NEC vs. BS 7671), we say so explicitly rather than assuming one applies everywhere.
Some of our content includes affiliate links to products we've researched — tools, calculators, and hardware we believe are genuinely useful for the work they're built for. If you buy through one of these links, we may earn a small commission at no extra cost to you. This never affects which products we recommend or how we describe them.
Guest and sponsored content. Articles from outside contributors are reviewed for technical accuracy and editorial fit before publication. Paid placements are clearly labeled as sponsored, and their links are marked as sponsored, in line with Google's guidelines. Payment never influences our calculators, our references to standards, or our independent tool reviews.
Content is reviewed and updated as codes, standards, and product lineups change.
Work With Azad Circuit Hub
Our readers are engineers, electricians, contractors, students, and homeowners across the US, UK, Europe, and beyond. If you have expertise to share or a product that fits this audience, there are two ways to reach them.
Guest Posts
Share original technical knowledge with our readers. Every submission is reviewed manually for accuracy and quality, and accepted posts include an author bio with one relevant link.
Read the guidelines →Sponsored Placements
Reach our audience with a clearly labeled sponsored article. Packages, rates, and availability are published openly, and every post goes through editorial review.
View packages and rates →Get in Touch
Have a correction, a question, a topic you'd like us to cover, or a guest post idea? We read every message. WhatsApp is the fastest way to reach us (usually within 24 hours); email and the contact form take 24-48 hours.