- What FEAD Actually Covers
- How You Qualify to Sit the Exams
- The DC Side: Domains 1-18
- The AC Side: Domains 19-36
- Where the DC and AC Lists Overlap
- Hands-On Skills the Exams Reward
- Original Practice Questions to Test Yourself
- A Domain-Ordered Six-Week Plan
- What Nobody Has Verified (and How to Plan Around It)
- FAQ
- FEAD means Fundamentals of Electricity - AC/DC, issued by Festo Didactic through FICP with NC3, and it covers both DC and AC.
- Students must score at least 70% on each certification examination and also complete the required hands-on labs.
- The 36-domain count merges two published topic lists (18 DC, 18 AC) with intentional overlaps, so it is not an official blueprint.
- Training must come from an actively certified NC3 instructor at a properly equipped institution; student recertification is not required.
What FEAD Actually Covers
FEAD is the shorthand this site uses for Fundamentals of Electricity - AC/DC, a Level 1 credential from Festo Didactic delivered through the Festo Industry Certification Program (FICP) in partnership with the National Coalition of Certification Centers (NC3). Exams run on the NC3Certs platform through participating institutions. If you want the background first, our explainers on what FEAD certification is and what FEAD stands for cover the naming and scope.
The credential combines two Festo preparation components: Fundamentals of Electricity - Direct Current (document 272395) and Fundamentals of Electricity - Alternating Current (document 272396). Both are listed together in NC3's FESTO Certification Portfolio, and Festo's program page presents the subject as DC and AC preparation. Neither the DC component alone nor the broader FICP capstone replaces this combined credential, so plan to study both sides.
How You Qualify to Sit the Exams
FEAD is not a walk-in, pay-and-test exam. Under the NC3Certs End User License Agreement, the pathway is built around training:
- Instructor requirement: you must receive training from an actively certified NC3 instructor at a properly equipped institution.
- Labs: you must complete the required hands-on labs. Knowledge assessment and practical lab completion are separate requirements, and passing one does not substitute for the other.
- Score: you need at least 70% on each certification examination.
- Proctoring: exams follow the issuing school's proctoring rules, so your instructor or testing coordinator sets the logistics.
- Account access: NC3Certs requires an active email account for two-factor authentication, so make sure you can receive codes before exam day.
Recertification is not required for students. The 80% score and three-year recertification you may see mentioned apply to instructors, not students. O*NET's listing for the same credential flags continuing-education renewal, but that is a secondary flag that conflicts with the primary NC3 student terms; follow the NC3 student policy. More detail lives in our FEAD requirements guide and passing score breakdown.
The DC Side: Domains 1-18
The DC component sheet lists 10 units and 10 labs. Those are curriculum quantities, not exam question counts or timed-exam lengths. The 18 DC topics fall into four working clusters, and it helps to study them in that order.
Cluster 1: Foundations and Safety (Domains 1-3)
Safety, Electrical Engineering History, Electricity Basics
Expect vocabulary and concept recognition here. Safety questions reward practical judgment, not memorized slogans.
- Hazards of working near energized circuits, and safe working habits at a lab bench
- Core quantities: voltage, current, resistance, power, and their units
- Landmark figures and discoveries in electrical engineering history, at a recognition level
- Conductors versus insulators, and charge, current flow, and sources of EMF
Cluster 2: Circuit Mathematics (Domains 4-8, 17)
Wiring, Ohm's Law, Kirchhoff's Laws, Instruments, Series/Parallel, Resistance
This is the heart of the DC side and the cluster most likely to involve calculation and schematic reading.
- Ohm's Law in all three rearrangements, plus power relationships
- Kirchhoff's Voltage Law around a loop and Current Law at a node
- Equivalent resistance for series, parallel, and mixed networks
- Factors that affect resistance: material, length, cross-section, and temperature
- Correct meter placement: voltmeters across, ammeters in series, ohmmeters on de-energized circuits
- Basic wiring practices and reading how a schematic maps to a physical build
Cluster 3: Energy Storage and Electromechanical Devices (Domains 9-14)
Capacitors, Relays, Electromagnetism, Magnetism, DC Motors, Solenoids
These topics connect circuit theory to devices you will meet in industrial settings.
- Capacitor charging and discharging behavior in DC circuits
- How a relay uses a small coil current to switch a separate load
- The link between current and magnetic field, and basic magnetic properties
- How a DC motor converts electrical energy into rotation
- How a solenoid produces linear force from a coil
Cluster 4: Components, Equipment, and Troubleshooting (Domains 15, 16, 18)
The DC list closes by bringing everything together: recognizing common components (power sources, resistors, inductors, capacitors, transformers, switches, relays, motors), using electrical measurement equipment, and troubleshooting electrical circuits. Troubleshooting is where weak fundamentals show up fastest, so do not treat it as an afterthought.
The AC Side: Domains 19-36
The AC component sheet lists 6 units and 6 labs, again curriculum quantities rather than exam specifications. Its 18 topics lean toward what happens after power leaves the source: how it is distributed, protected, and diagnosed.
AC Concepts and Circuit Analysis (Domains 20-23, 28-29)
Basic concepts of electrical circuits, Ohm's and Kirchhoff's laws in AC context, measuring with instruments, series and parallel circuits, and AC capacitors.
- How AC differs from DC: alternating polarity, frequency, and waveform ideas
- Capacitive behavior in AC circuits, and why it differs from the DC charging picture
- Applying Ohm's and Kirchhoff's laws when reactance and impedance enter the picture
- Meter use on AC circuits, including what the reading represents
Magnetic Components and Protective Devices (Domains 24, 32, 34)
Electromagnetism, inductors, transformers, relays, contactors, circuit breakers, and fuses.
- How an inductor opposes changes in current
- Transformer principles: step-up, step-down, and the turns relationship
- Contactors as heavy-duty relays for switching larger loads
- Fuses and circuit breakers as overcurrent protection, and how each responds to a fault
Distribution and Panels (Domains 25, 33, 35)
Electrical distribution, electrical panels, and the distribution network.
- How power reaches a building or machine and is divided into branch circuits
- The purpose and layout of a panel, including breakers and protection
- Basic structure of a distribution network and where protective devices sit within it
Wiring, Components, Instruments, and Fault-Finding (Domains 19, 26, 27, 30, 31, 36)
Safety, troubleshooting, common electrical components, measurement equipment, wiring, and troubleshooting basics.
- Safety again, now with AC distribution and panel hazards in mind
- A systematic approach to isolating faults in AC circuits
- Choosing the right instrument for the quantity being measured
Where the DC and AC Lists Overlap
Many topic names appear on both lists. That is why the header count of 36 does not mean 36 distinct bodies of knowledge. Studying the overlaps once, then layering AC-specific behavior on top, saves real time.
| Shared Topic | DC Domain | AC Domain | What Changes in AC |
|---|---|---|---|
| Safety | 1 | 19 | Panels, distribution, and higher-energy equipment enter the picture |
| Electricity basics | 3 | 20, 28 | Alternating quantities replace constant ones |
| Wiring | 4 | 31 | Branch circuits and protection come into play |
| Ohm's and Kirchhoff's laws | 5, 6 | 21 | Reactance and impedance affect calculations |
| Measuring instruments | 7, 16 | 22, 30 | Readings represent alternating waveforms |
| Series and parallel circuits | 8 | 23 | Combined reactive and resistive elements |
| Capacitors | 9 | 29 | Continuous charge and discharge cycles |
| Electromagnetism and relays | 10, 11, 14 | 24, 32 | Inductors, transformers, and contactors extend the idea |
| Components survey | 15 | 27 | Same device families, AC-oriented behavior |
| Troubleshooting | 18 | 26, 36 | Panels and distribution add new fault locations |
Key Takeaway
Master the DC version of each shared topic first. Then ask one question per topic: "What is different when the source alternates?" That framing covers most of the AC list efficiently.
Hands-On Skills the Exams Reward
An earlier Festo certification program guide for the combined Level 1 Electricity credential (revision 031023, March 2023) lists nine certification topics and competencies that point to practical ability: reading schematics, constructing circuits, calculating impedance and reactance, taking practical measurements, and finding faults. That older guide is a historical combined curriculum, not a verified current section count, and the newer September 2025 component lists control our topic mapping. But the skills it describes remain a useful checklist for lab preparation.
- Read a schematic and build it. Practice translating symbols into a physical layout and back again.
- Predict before you measure. Calculate the expected voltage or current first, then check with the meter. Gaps between prediction and reading are exactly what troubleshooting teaches.
- Use each instrument correctly. Know what each meter connects to, what range to select, and when a circuit must be de-energized.
- Calculate reactance and impedance. Be comfortable with how capacitors and inductors resist AC differently.
- Isolate faults step by step. Narrow down open circuits, shorts, and failed components methodically instead of guessing.
Because lab completion is a separate requirement from the exam score, treat your lab sessions as study time, not just a box to check. See our FEAD training overview for how the instructional side fits together.
Original Practice Questions to Test Yourself
These are original questions written for this guide. They are not drawn from NC3's exam bank, which is protected and not authorized for copying or redistribution. Try them before reading the answers.
Question 1 (Domains 5, 8)
A 12 V source drives a series circuit containing resistors of 100 ohms and 200 ohms. What is the current, and what is the voltage across the 200 ohm resistor?
- Answer: Total resistance is 300 ohms, so current is 12 / 300 = 0.04 A (40 mA). Voltage across the 200 ohm resistor is 0.04 x 200 = 8 V.
Question 2 (Domains 6, 8)
Two branches in parallel draw 2 A and 3 A from a source. What current flows in the supply conductor feeding the junction, and which law explains it?
- Answer: 5 A. Kirchhoff's Current Law: current entering a node equals the current leaving it.
Question 3 (Domains 7, 22)
You need to measure the current through a load. Where does the ammeter connect, and why does that placement matter?
- Answer: In series with the load, because it must carry the same current being measured. Placing an ammeter across a source can create a near short circuit.
Question 4 (Domains 10, 32)
Why is a relay or contactor used to switch a large load instead of a small control switch directly?
- Answer: The small control circuit energizes a coil, and the coil closes separate contacts rated for the larger load current, isolating and protecting the control side.
Question 5 (Domains 18, 26, 36)
A series lamp circuit is dead. A voltmeter across the source reads normal, but a reading across one component reads full source voltage. What does that suggest?
- Answer: That component is likely open. In a series circuit with an open element, the full supply voltage appears across the open point because no current flows to drop voltage elsewhere.
For a faster refresher on formulas and facts, see our FEAD cheat sheet, and drill more scenarios with the FEAD practice tests.
A Domain-Ordered Six-Week Plan
This is the one structured schedule in this guide. It follows the logic of the domains rather than generic time blocks, and you can compress or stretch it to match your course pacing.
Safety, Basics, and Ohm's Law
- Domains 1-3 and 5: quantities, units, and Ohm's Law fluency
- Complete the matching lab and write down every formula you used
Kirchhoff, Series/Parallel, and Instruments
- Domains 4, 6, 7, 8, 17: solve mixed networks by hand
- Practice predicting meter readings before measuring
DC Devices
- Domains 9-14: capacitors, relays, magnetism, motors, solenoids
- Domains 15, 16, 18: component recognition and DC troubleshooting
AC Concepts and Reactive Components
- Domains 20-24, 28, 29: AC behavior, capacitors, impedance and reactance
- Map each topic back to its DC counterpart using the overlap table
Protection and Distribution
- Domains 25, 32-35: transformers, contactors, breakers, fuses, panels, networks
- Trace how power flows from the source to a protected load
Integration and Fault-Finding
- Domains 19, 26, 27, 30, 31, 36: troubleshooting scenarios across DC and AC
- Finish labs, review weak areas, and take full-length mixed practice sets
Not sure how much time you need? Our difficulty guide discusses what tends to challenge candidates and why.
What Nobody Has Verified (and How to Plan Around It)
An honest study guide should say what it cannot confirm. As of the sources checked for this article:
- The portfolio label and historical guides do not establish whether a single combined examination or separate component examinations are currently delivered. Do not assume either format.
- Exact current question counts, exam-sitting durations, and student exam fees were not verified, so we do not publish them.
- No pass rate or salary statistic specific to FEAD was verified. Our pages on the pass rate and salary explain what is and is not known.
- Exam dates are set through participating institutions rather than a public national calendar, which is why our scheduling guide focuses on how to coordinate with your school.
FAQ
Yes. FEAD is the combined AC/DC credential, and both the DC and AC components remain in scope. Neither the DC component alone nor the broader FICP capstone replaces it.
NC3's student terms require at least 70% on each certification examination. You must also complete the required hands-on labs, which are a separate requirement from the exam score. See our passing score guide for more.
Not under the published NC3Certs terms. Students must receive training from an actively certified NC3 instructor at a properly equipped institution, and exams follow that school's proctoring rules.
Student recertification is not required under the current NC3 student terms. The recertification every three years applies to instructors. O*NET's renewal flag is a secondary note that conflicts with the primary NC3 policy.
It demonstrates verified foundational knowledge in DC and AC fundamentals, which supports entry into technician-track programs and roles. We discuss the tradeoffs in our ROI analysis and what roles to look at in our FEAD jobs overview.
Ready to test your readiness domain by domain? Work through scenario questions on the FEAD practice test site and revisit the weakest clusters from the plan above.