Author: Abdul Wassay

Abdul Wassay is an Electrical Engineer with over 15 years of hands-on experience in PLC programming, SCADA systems, industrial automation, electrical troubleshooting, and renewable energy design. He publishes standards-based calculators, tool guides and product reviews on Azad Circuit Hub, citing NEC, IEC, and IEEE codes where applicable. Read Abdul's full Profile and Credentials here →

Electrical Standards | Blog
IEC Standard for Protection Relays
Posted on25/04/202524/01/2026
The IEC standard for protection relays plays a vital role in…
Read More IEC Standard for Protection Relays
Blog | Electrical Concepts | Electrical Power
Can Neutral and Ground Be on the Same Bus Bar in Main Panel
Posted on25/04/202524/01/2026
Electricity is the lifeblood of modern infrastructure. Behind the walls of…
Read More Can Neutral and Ground Be on the Same Bus Bar in Main Panel
Blog | Busbar
Busway vs Bus Duct: All You Need to Know
Posted on25/04/202511/07/2026
Busway vs Bus Duct explained with key differences, construction, applications, advantages, NEC considerations, and expert selection tips to help engineers choose the right power distribution system.
Read More Busway vs Bus Duct: All You Need to Know
Blog | Electrical Concepts
Bus Duct in Electrical System: Best Guide
Posted on25/04/202524/01/2026
The bus duct in electrical system is a critical component in…
Read More Bus Duct in Electrical System: Best Guide
Blog | Electrical Testing | Transformers Testing
Which Test of Winding is Essential Before Giving Supply to Transformer
Posted on24/04/202524/01/2026
Before you energize any transformer, there’s one big question to ask:…
Read More Which Test of Winding is Essential Before Giving Supply to Transformer
Blog | Electrical Concepts | Resistors
Types of Variable Resistor: Best Guide
Posted on23/04/202524/01/2026
A variable resistor is a key component in electronic circuits. It…
Read More Types of Variable Resistor: Best Guide
Blog | Electrical Concepts | Electrical Power
Plant Availability Factor Formula: A Complete Guide
Posted on23/04/202524/01/2026
Understanding the plant availability factor formula is essential in power generation…
Read More Plant Availability Factor Formula: A Complete Guide
Blog | Electrical Concepts | Pumps and Motors
What is the Maximum Value for Short Circuit Protection for Multi-Motor Branch Circuits
Posted on23/04/202524/01/2026
When dealing with complex electrical systems that include more than one…
Read More What is the Maximum Value for Short Circuit Protection for Multi-Motor Branch Circuits
Electrical Concepts | Blog | Electrical Testing | Transformers Testing
PI Test of Transformer: Procedure, Results & Acceptance Criteria
Posted on22/04/202524/01/2026
The PI test of transformer is a crucial diagnostic tool used…
Read More PI Test of Transformer: Procedure, Results & Acceptance Criteria
Cables Tools | Cables
Cable Size Calculator Single & Three-Phase | IEC, BS 7671 & NEC
Posted on22/04/202530/08/2026
Free cable size calculator for single and three-phase circuits. Covers IEC 60364, BS 7671 and NEC sizing with derating and voltage drop checks.
Read More Cable Size Calculator Single & Three-Phase | IEC, BS 7671 & NEC
Electrical Power | Blog | Power Generation | Transformers
Fault Current at Transformer Secondary
Posted on21/04/202513/07/2026
The fault current at transformer secondary is a critical concept in…
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Blog | Electrical Power
Fault Current Division Factor: Best Guide
Posted on21/04/202513/07/2026
The fault current division factor is a key concept in electrical…
Read More Fault Current Division Factor: Best Guide
Relays
Motor Protection Circuit Breaker vs Overload Relay
Posted on20/04/202531/08/2026
Motor Protection Circuit Breaker vs Overload Relay explained with key differences, working principles, applications, advantages, limitations, and selection guide to help engineers choose the right motor protection device.
Read More Motor Protection Circuit Breaker vs Overload Relay
Circuit Breakers | Blog
Motor Protection Circuit Breaker Types
Posted on20/04/202524/01/2026
Understanding motor protection circuit breaker types is essential for anyone dealing…
Read More Motor Protection Circuit Breaker Types