Electrical Tutorials
Welcome to the Electrical Tutorials category at Industrial Control Academy.
This section brings together practical guides on electrical engineering topics used in industrial and commercial applications. Whether you’re an engineering student, an electrician, a maintenance technician, or a working engineer, you’ll find easy to follow articles, that explain both the theory and the practical for electrical systems.
This category include electrical fundamentals, power calculations, motor control, circuit protection, cable sizing, voltage drop, grounding, power factor, transformers, and also electrical troubleshooting. Wherever possible, articles include real-world examples, step-by-step explanations, and with practical tips based on industry experience.
Our goal is to help you build a strong understanding of electrical engineering concepts, that you can confidently apply in the field while following applicable electrical codes, manufacturer recommendations, and safe work practices.
A buck boost transformer can raise 208V to around 236V, or reduce 240V closer to 208V when wired as an autotransformer. It is used for small voltage correction. It is not a replacement for a…
An overload relay is a protective device that opens the motor starter circuit when motor current remains too high for too long, and you size it from the motor nameplate Full Load Amps (FLA), not…
Trace one path and most electrical drawings stop looking confusing: source, protection, control, load, and back to source. That habit solves more panel problems than memorizing symbols ever will. This guide covers the drawing types,…
One of my guys once pulled a DPDT relay out of the spares bin for a job that only needed an SPST. Cost us a spare part, and twenty minutes retracing wires that never needed…
A relay is an electrically operated switch. A small control signal, such as 12 V or 24 V, energizes its coil and changes the state of a separate set of contacts. These contacts can then…
Incoming power Cables lands on the VFD’s input terminals, R/S/T or L1/L2/L3. The motor connects to the output terminals, U/V/W or T1/T2/T3. Both the drive and the motor frame need a solid ground back to…
I walked into a beverage plant last year where the maintenance manager was annoyed about a $4,200 power factor penalty on his monthly utility bill. But who is the culprit? A 150 HP motor running…
A GFCI is looking for current escaping to ground, the kind of fault that can shock a technician working near equipment. An AFCI is looking for arcing, the kind of fault that starts fires inside…
Complete guide to breaker sizing for real electrical loads — electric stoves, HVAC/air conditioners, and Level 2 EV chargers. Covers NEC 80%/125% continuous load rules, MCA/MOP nameplate reading, wire-breaker coordination, and step-by-step sizing examples for US homeowners and electricians.
Free electricity bill calculator — enter wattage, daily hours, and your utility rate to see daily, monthly, and annual electricity costs. Includes average US electricity rates by state, annual cost tables for common appliances, and tips to lower your energy bill.
Calculate motor full load current (FLA) instantly for single-phase and three-phase motors. Enter kW or HP, voltage, power factor, and efficiency. Includes NEC reference charts, worked examples, and tips for industrial electricians and engineers.
A DC motor is more than a machine that rotates, apply voltage, current creates the torque and as the motor rotate and speeds up, back EMF pushes against the supply. Adding more load then motor…
1. Introduction ACBs are used in the main switchboards of factories, malls, data centers, power plants, and large buildings. They protect transformers, generators, long busbars, and very expensive equipment from faults and fire. Older systems…
The circuit breaker that employs conventional technology interrupts the circuit only if the current value reaches its maximum value. It gives an effective protection from the most common troubles of overload or short circuit. However,…
A transformer look simple from outside, but engineers need to understand much more than simple voltage conversion. Transformer Primary/secondary side identification, MVA rating, impedance, cooling, protection and testing all affect how the equipment is selected…
Last summer my neighbor in the cul-de-sac had this backyard grill setup that looked sweet. String lights, little mini fridge, wet grass from the sprinklers, the whole deal. The outlet by the patio post was…
Electrical Wiring GFCI Outlet Step-by-Step Guide Every year, people get shocked in bathrooms, kitchens, and back patios, but a GFCI cuts that power in a split second, and wiring one is way easier than you…
A distribution transformer steps medium voltage, such as 11 kV or 13.8 kV, down to the low voltage your equipment and loads use, such as 400/230 V or 480Y/277 V. The kVA rating is only…
Quick answer: A power line transformer, usually a pole-mounted distribution transformer, steps the medium voltage on overhead distribution lines down to the utilization voltage used by homes and businesses. In North America, a typical residential…
The difference between neutral and ground comes down to the job each conductor does. The neutral is a grounded circuit conductor, and it carries normal return current in circuits that use one. The ground, called…