I.J Electrical Engineering and Equipments Limited

08/03/2026

Is it right to use A.C cable in place of D.C cable vise verser?

Yes — an AC cable can sometimes be used for DC, but it depends on the situation. ⚡
However, using DC cable for AC is usually safer than the other way around. Let me explain simply:
1. Using AC cable for DC
It can work, but there are some concerns:
Insulation rating: DC current flows continuously and can cause more heating.
Voltage rating: Some AC cables are rated by RMS voltage; DC stress can be different.
Safety when switching: DC produces stronger arcs than AC when disconnecting.
If the AC cable is:
Thick enough (correct current rating)
Well insulated
Good quality
➡️ Then it is generally okay for low-voltage DC systems like 12V / 24V / 48V solar or battery systems.
2. Using DC cable for AC
This is usually fine because DC cables are normally built with strong insulation and thicker copper.
3. Important thing that matters most
The main factor is current capacity (amps), not whether it is AC or DC.
Example:
Your 12V inverter drawing 125A needs very thick cable (like 35mm² or more).
A normal house AC cable might be too small even if it works for 220V.
4. In solar/inverter systems
For:
Battery → inverter
Solar panel → charge controller
It is better to use proper DC cables because they are designed for continuous current and outdoor conditions.
✅ Conclusion:
AC cable can be used for DC if properly sized and insulated.
But DC cables are safer and preferred for DC systems.

26/02/2026

perimeter light

16/02/2026

10/02/2026

The i.j youngie technical team

09/02/2026

Is there such a thing as a two-phase wiring system in electrical engineering?

Yes, two-phase systems definitely exist, though they are quite rare today compared to the standard single-phase and three-phase systems we use daily. In the late 19th and early 20th centuries, two-phase power was a serious competitor during the "War of Currents."
​In a two-phase system, there are two separate voltages (phases) that are offset by 90 degrees. This is different from a three-phase system, where the phases are offset by 120 degrees.
​🔌 Two-Phase Wiring
​A two-phase system typically requires four wires (two for each phase). However, it can also run on three wires by using a common return wire.
​The Advantage: Unlike single-phase power, two-phase power can provide a rotating magnetic field, which is essential for starting motors without needing extra capacitors or starting windings.
​The Decline: As power transmission moved toward higher voltages and longer distances, three-phase systems won out because they are more efficient, requiring less copper (three wires instead of four) to transmit the same amount of power.
​⚙️ Two-Phase Machines
​Even though the grid has moved on, two-phase machines are still around in specific forms:
​Induction Motors: Early industrial motors used two-phase power. Some old buildings in cities like Philadelphia or London kept two-phase service for decades just to run original elevators or machinery.
​Stepper Motors: Many modern high-precision stepper motors used in 3D printers and robotics are technically two-phase machines. They use two separate coils to move the motor in precise "steps."
​Servomotors: Small AC servomotors used in control systems often operate on two phases to allow for precise speed and direction control.
​I'll ask guiding questions along the way as we explore this. Which part of this peaks your interest most?
​The Physics: How the 90-degree offset creates a rotating magnetic field to spin a motor.
​The History: Why we transitioned from two-phase to three-phase power.
​Modern Use: How stepper motors use two phases to achieve precise movement in technology today.

07/02/2026

05/02/2026

Successfully installed a three-phase, 40kVA automatic voltage regulator for industrial applications.

03/02/2026

Does temperature impact the flow of electricity?

Yep—temperature definitely affects how electricity flows, but how it affects it depends on the material.
🔌 In metals (like copper wires)
Higher temperature → more resistance
When metals heat up, their atoms vibrate more.
Those vibrations get in the way of moving electrons.
Result: current flows less easily.
That’s why power lines lose more energy as heat on hot days.
❄️ In cold conditions
Lower temperature → less resistance
Electrons move more smoothly.
In extreme cases, some materials become superconductors, where resistance drops to zero (very cool stuff—literally).
💡 In semiconductors (like silicon in electronics)
It’s kind of the opposite:
Higher temperature → lower resistance
Heat frees more charge carriers.
That’s why electronics can behave differently—or overheat—when they get hot.
🌡️ In insulators
Temperature usually doesn’t matter much…
Until it gets very hot, at which point some insulators start conducting a little.
Big picture
Metals: hotter = worse flow
Semiconductors: hotter = better flow (up to a point)
Superconductors: cold enough = perfect flow.

02/02/2026

Will solar power replaced grid power in the nearest future?

Short answer: solar will become a major part of power systems, but it probably won’t fully replace the grid—at least not in the way people usually imagine.
Longer, clearer picture 👇
What will happen?
Solar keeps getting cheaper and better. It’s already the cheapest new electricity source in many countries.
More homes and businesses will generate their own power. Rooftop solar + batteries = less dependence on utilities.
The grid will change, not disappear. It’ll act more like a smart coordinator than a one-way power pipeline.
Hybrid systems will dominate. Solar + wind + hydro + nuclear + storage working together.
Why solar alone can’t fully replace the grid (yet)
Intermittency
No sun at night, less on cloudy days. Massive storage helps, but seasonal gaps are still hard.
Storage limits
Batteries are improving fast, but storing months of energy (for winter, for example) is still expensive.
Dense cities & industry
Skyscrapers, factories, data centers, and transit systems need huge, constant power that rooftop solar alone can’t supply.
Reliability & resilience
A shared grid balances supply and demand across regions and acts as backup during failures.
What the future most likely looks like
Decentralized power: millions of small solar systems
Microgrids: neighborhoods or campuses that can disconnect from the main grid if needed
Smart grids: AI-managed, flexible, two-way electricity flow
Solar as a backbone, not a solo act
Bottom line
Solar won’t kill the grid.
Solar will reshape the grid.

29/01/2026

about to install this 40kva, three phase automatic voltage voltage regulator

25/01/2026

Successful Installation of 6.2 kva hybrid inverter with 10kwh felicity lithium battery