Electrical engineering types are the specialized sub-disciplines—such as power, electronics, controls, and telecommunications—that dictate whether an engineer designs high-voltage grid infrastructure, low-voltage microchips, or automated robotic systems. Knowing which specific type applies to your project changes everything from the voltage thresholds you must respect to the exact safety codes (like the NEC versus FCC regulations) governing your build, as well as the physical components you select. The most common confusion in the DIY and maker space is assuming 'electrical engineering' is a single monolith, or worse, confusing an electrical engineer (who designs the circuitry, calculates loads, and writes firmware) with a licensed electrician (who physically pulls the wire, bends conduit, and terminates the breakers on a jobsite).
The 5 Core Electrical Engineering Types
According to the IEEE technical activities framework, the broader field of electrical and electronics engineering is divided into several distinct societies and councils. For makers, hobbyists, and DIYers, five of these disciplines intersect with your workbench most frequently.
| Engineering Type | Core Focus | Typical Voltage Range | Common Components & Tools |
|---|---|---|---|
| Power Engineering | Generation, transmission, and distribution of AC/DC electrical power. | 120V to 500kV+ | Transformers, switchgear, THHN wire, ETAP software, clamp meters. |
| Electronics Engineering | Design of low-voltage circuits, PCBs, and consumer devices. | 1.2V to 48V DC | MOSFETs, op-amps, ESP32s, Altium/KiCad, oscilloscopes. |
| Controls Engineering | Automation, feedback loops, and industrial robotics. | 24V DC to 480V AC | PLCs, VFDs, PID controllers, stepper motors, proximity sensors. |
| Telecommunications | Signal transmission via RF, fiber optics, and networking. | Millivolts (RF) to 5V | Antennas, coaxial cable, SDRs, spectrum analyzers, LoRa modules. |
| Microelectronics | Semiconductor physics and integrated circuit (IC) fabrication. | Nanovolts to 3.3V | Silicon wafers, FinFETs, cleanroom tools, SPICE simulators. |
Where You Meet This in Practice: Sizing a 40A Conductor
To understand how these electrical engineering types approach the exact same physical problem differently, let us look at a concrete numeric example: moving 40 Amps of current from point A to point B. The discipline dictates the standard, the material, and the physical dimensions.
The Power Engineering Approach (AC Mains)
A power engineer or electrical designer is sizing a 240V AC split-phase residential feeder to supply a new workshop subpanel. They are bound by the NFPA National Electrical Code (NEC).
- Calculation: Looking at NEC Table 310.16, they select the 75°C column for standard terminations.
- Selection: 8 AWG THHN copper wire has an ampacity of 50A at 75°C, which safely covers the 40A breaker requirement.
- Physical Reality: The wire is roughly 0.162 inches in diameter, insulated, and pulled through 3/4-inch EMT conduit.
The Electronics Engineering Approach (DC PCB)
An electronics engineer is designing the printed circuit board (PCB) for a 48V DC e-bike motor controller that must handle the same 40A continuous load. They are bound by the IPC-2221 standard for PCB trace sizing.
- Calculation: Using the IPC-2221 internal/external trace width formulas, they calculate the required copper cross-section to keep the temperature rise below 20°C.
- Selection: For an external layer using 2 oz copper (approx 70 µm thick), a 40A current requires a trace width of roughly 420 mils (10.6 mm).
- Physical Reality: If the board is too small for a 10.6mm trace, the engineer must abandon the PCB trace entirely and design a footprint for a physical copper busbar or use heavy-pour polygon fills with solder-mask openings to flood the trace with solder.
Engineering Design vs. Trade Installation
A critical boundary to understand is the difference between engineering and trade work. Makers often blur this line, but legally and practically, it is rigid.
Electrical Engineers (EEs) design the systems. A power EE designs the inverter topology that converts DC battery power to AC grid power. An electronics EE writes the firmware for the ESP32 that monitors the battery management system (BMS). They work in CAD software, run SPICE simulations, and prototype on breadboards or development kits. They do not typically pull wire in residential walls.
Licensed Electricians install and maintain the physical infrastructure. They interpret the blueprints drawn by the engineers, calculate voltage drop over long conduit runs, bend EMT pipe, and torque terminal lugs to manufacturer specifications. If you are upgrading your home service from 100A to 200A, you do not hire an electrical engineer; you hire a licensed electrician who will pull a permit from your local Authority Having Jurisdiction (AHJ).
Where the two overlap is in Controls Engineering and industrial automation. A controls engineer might design a PLC ladder-logic program for a factory assembly line, while an industrial electrician wires the 480V 3-phase power to the VFDs and connects the 24V DC sensor loops. As a DIYer building home automation, you are essentially acting as both the electronics engineer (writing the Home Assistant YAML and soldering the relays) and the electrician (wiring the 120V smart switches).
FAQ: Electrical Engineering Types and Project Roles
Which electrical engineering type handles solar panel and battery systems?
It requires a hybrid of Power Engineering and Electronics Engineering. The power engineering side handles the high-voltage AC side: sizing the inverters, calculating the AC disconnect breaker sizes, and ensuring grid-tie compliance with IEEE 1547. The electronics engineering side handles the DC side: designing the MPPT charge controller algorithms, selecting the MOSFETs for the buck/boost converters, and programming the BMS to balance the LiFePO4 cells. If you are just buying off-the-shelf solar gear and wiring it to your house, you are doing trade-level electrical work, not engineering.
What type of electrical engineer designs Arduino and ESP32 projects?
Projects involving microcontrollers like the Arduino Nano or the ESP32-WROOM-32 fall squarely under Electronics Engineering, with a heavy overlap into Computer Engineering (which focuses more on the software/firmware side). An electronics engineer in this space deals with GPIO pin mapping, I2C/SPI bus pull-up resistor sizing, PWM frequency tuning for motor control, and ADC noise filtering. They are the ones who look at a datasheet to figure out why your ESP32 is browning out when a relay switches on.
Do I need an electrical engineer or an electrician for a subpanel installation?
You need a licensed electrician. An electrical engineer is not legally permitted to pull wire and terminate breakers in a residential or commercial building unless they also hold a journeyman or master electrician license. The engineer's role would only come into play if you were designing a custom, non-standard power distribution system for a massive off-grid compound that required stamped structural and electrical load calculations that fall outside standard NEC prescriptive paths.
Which electrical engineering type focuses on home automation and smart lighting?
Home automation sits at the intersection of Electronics Engineering, Telecommunications, and Controls Engineering. The electronics engineer designs the physical smart switch hardware and the capacitive touch sensors. The telecommunications engineer designs the Zigbee, Z-Wave, or Thread mesh networking protocols that allow the devices to talk without overwhelming your WiFi router. The controls engineer designs the logic—like the PID loops for your smart thermostat or the occupancy-based lighting state machines in Home Assistant.
