- What the 25 Examination Topics Actually Are
- How the Exam Delivers These Topics
- Cluster 1: Supply, Isolation, Earthing and Shock
- Cluster 2: Insulation, Damage and Creepage
- Cluster 3: Fire, Fuel, Heat and Mechanical Hazards
- Cluster 4: Design, Hazard Analysis and Review
- Cluster 5: Legislation, Standards and Certification
- Cluster 6: Declarations and User Documentation
- Sequencing the 25 Topics Across Your Prep
- Eligibility, Fees and Renewal in Brief
- Frequently Asked Questions
- The Product Safety Engineer credential lists 25 issuer-published Examination Topics, but no official weighting per topic is published.
- The written exam is 50 multiple-choice questions in four hours, open book, with a 70% average passing criterion.
- Fees are $50 application, $260 certification and $150 annual renewal; renewal requires 30 CPD hours per 12-month period.
- Topics cluster into six practical groups, from electrical shock and insulation to certification and user documentation.
What the 25 Examination Topics Actually Are
The Product Safety Engineer (PSE) credential is issued through Exemplar Global/iNARTE, and its scope is defined in the Product Safety Engineer section of the iNARTE Personnel Certification Catalog. That catalog lists 25 Examination Topics. This article treats them as 25 content areas, but it is important to be precise about what that means.
Because the topics are unweighted, your strategy should be coverage-first. A candidate with a strong electrical background can still lose points on legislation, assessment authorities or documentation if they treat those as "soft" topics. The exam is built around the day-to-day judgment of someone who ensures products are safe and legally placed on the market, and that spans engineering, analysis and regulatory process.
For a wider orientation on the credential itself, see What Is PSE Certification? and the broader PSE Study Guide 2026. If you want to test how these topics feel in question form, the PSE practice test site is the natural companion to this guide.
How the Exam Delivers These Topics
Knowing the format changes how you study. The published logistics for the Product Safety Engineer written exam are:
| Element | Published detail |
|---|---|
| Question count and type | 50 multiple-choice questions |
| Time allowed | Four hours |
| Passing criterion | 70% average |
| Reference materials | Open book / open notes |
| Calculator | Scientific calculator allowed |
| Results | Within 10 working days |
| Retake wait | 90 days |
Two implications follow. First, with 50 questions spread across 25 topics, you should expect roughly two questions per topic on average, though the issuer does not publish an item-by-topic distribution, so treat that as a planning heuristic, not a fact. Second, open-book does not mean easy. Four hours for 50 questions is generous, but the questions reward knowing where a requirement lives and how to apply it, not simply recalling a definition. Candidates who arrive with an organized, tabbed reference set perform better than those who plan to look everything up cold.
For difficulty context, read How Hard Is the PSE Exam?, and for the scoring rule in detail, PSE Passing Score 2026. Note that the exam administrator is Exemplar Global; a separate worldwide testing vendor, remote platform or adaptive format has not been verified, so confirm delivery mode when you register.
Cluster 1: Supply, Isolation, Earthing and Shock
The first six topics form the electrical-safety core. They are tightly linked, so study them as one system rather than six separate lists.
Connection to supply and Isolation of supply (Topics 1-2)
These cover how equipment is connected to its power source and how it can be reliably disconnected for safe servicing or emergency.
- Supply connection arrangements and what makes a connection safe or unsafe
- Isolation devices, their function, and where they are required
- How disconnection supports maintenance and fault conditions
Earthing (Topic 4)
Protective earthing is one of the most heavily interlinked concepts in product safety.
- The purpose of protective earth and how it limits fault consequences
- Relationship between earthing, insulation class and shock protection
- Continuity and integrity considerations during testing
Types of Insulation and Protection against electrical shock (Topics 5-6)
Insulation categories determine how a product protects users; shock protection is the outcome those categories are meant to deliver.
- Distinguishing insulation types and when each is applied
- How insulation and earthing combine to protect against shock
- Reasoning about a single-fault condition
Topic 3, Mechanical hazards, sits in this early block of the list but is a different discipline: moving parts, sharp edges, stability and enclosures. Many electrically trained candidates under-prepare here. Give it deliberate time instead of assuming it is intuitive.
Cluster 2: Insulation, Damage and Creepage
Topics 11 and 12, Insulation damage and Creepage, deserve their own attention because they bridge theory and measurement.
Insulation damage (Topic 11)
Insulation does not fail only through electrical overstress. Candidates should understand how thermal, mechanical and environmental effects degrade insulation over a product's life.
- Common degradation mechanisms and their safety consequences
- How design choices reduce the likelihood of insulation compromise
Creepage (Topic 12)
Creepage concerns the surface path between conductive parts and is closely tied to insulation coordination in real designs.
- What creepage distance represents and why it matters
- How it relates to insulation type and working conditions
- Reading and applying tabulated requirements accurately
Cluster 3: Fire, Fuel, Heat and Mechanical Hazards
Four topics address thermal and fire safety: Resistance to fire (7), Fire hazards (8), Limits on fuel (9) and Limits on heat (10). Together they ask a design question: how do you stop a fault from becoming a fire, and how do you contain one that starts?
- Resistance to fire focuses on material and enclosure behavior when exposed to ignition sources.
- Fire hazards examines the ways products can initiate or propagate fire.
- Limits on fuel addresses restricting combustible content so a fault cannot sustain a fire.
- Limits on heat addresses temperature rise and keeping surfaces and components within safe bounds.
These topics reward cause-and-effect thinking. A typical question might present a design scenario and ask which measure most directly reduces ignition risk or limits spread. Build a habit of asking, for any hazard, whether the safeguard works by preventing ignition, limiting fuel, limiting heat or containing fire.
Key Takeaway
Group the four fire and heat topics into a single mental model: ignition source, fuel, heat, containment. It makes related questions far faster to reason through than memorizing four separate lists.
Cluster 4: Design, Hazard Analysis and Review
Topics 13 through 17 shift from hazard-specific knowledge to engineering method. This is where the credential distinguishes an engineer from a technician.
Inter system and intra system design (Topic 13)
Safety depends not only on a single unit but on how subsystems and interconnected systems interact.
- Safety implications of interfaces between subsystems
- How combining equipment can introduce hazards neither part had alone
Equipment design (Topic 14)
Translating safety requirements into concrete design decisions across the product.
Hazard analysis, Risk assessment and Design review (Topics 15-17)
These three form a workflow: identify hazards, evaluate risk, then verify the design through structured review.
- Identifying credible hazards systematically rather than ad hoc
- Judging severity and likelihood to prioritize mitigation
- Using design review as a checkpoint before release
Candidates should be able to explain the difference between hazard analysis and risk assessment, since the two are easy to conflate under time pressure. Hazard analysis finds what could go wrong; risk assessment weighs how bad and how likely it is.
Cluster 5: Legislation, Standards and Certification
Topics 18 through 23 are the compliance ecosystem, and they are where many technically strong candidates lose ground.
- Legislation US, EEC and International (18): the legal frameworks governing product safety across major markets.
- Military and Civil Electrical Safety Standards (19): the standards landscape spanning defense and civilian applications. The global catalog lists this heading; do not substitute regional variants.
- Safety tests (20): the tests used to demonstrate conformity and how results are interpreted.
- Assessment authorities (21) and Competent Bodies (22): the organizations that evaluate or authorize conformity, and how their roles differ.
- Safety certification (23): how a product earns formal recognition of safety compliance.
The challenge here is breadth. You are not expected to memorize every clause of every standard, which is exactly why the open-book format matters. You should, however, understand which framework applies in which circumstance and be able to navigate your references quickly. The people who most often need this fluency work in product compliance, test laboratories, certification and manufacturing quality roles; see PSE Jobs for how the credential maps to career paths.
Cluster 6: Declarations and User Documentation
The last two topics, Declarations of Conformity (24) and Operating and maintenance instructions and handbooks (25), are easy to dismiss as paperwork. Do not.
Declarations of Conformity (Topic 24)
A declaration is the manufacturer's formal statement that a product meets applicable requirements.
- What a declaration asserts and what supports it
- How it relates to the certification and assessment topics above
Operating and maintenance instructions and handbooks (Topic 25)
Safe use depends on instructions that are accurate, complete and understandable.
- Safety-relevant content users and servicers must be given
- How documentation acts as a risk-reduction measure of last resort
These topics tie back to risk assessment: when a hazard cannot be fully designed out, residual risk is communicated through warnings and instructions. Understanding that link makes documentation questions logical rather than rote.
Sequencing the 25 Topics Across Your Prep
Because the topics are unweighted, sequence by dependency, not importance. Here is one PSE-specific ordering that builds knowledge in layers.
Electrical shock foundation
- Connection to supply, Isolation of supply, Earthing
- Types of Insulation and Protection against electrical shock
Insulation behavior and physical hazards
- Insulation damage and Creepage
- Mechanical hazards
Fire and thermal safety
- Resistance to fire, Fire hazards, Limits on fuel, Limits on heat
Engineering method
- Inter/intra system design, Equipment design
- Hazard analysis, Risk assessment, Design review
Compliance ecosystem and documents
- Legislation, Military and Civil standards, Safety tests
- Assessment authorities, Competent Bodies, certification, Declarations, handbooks
Foundations come first because later topics assume them: risk assessment and certification questions lean on shock, insulation and fire concepts. Use the final days for an organized tab-and-index pass through your reference materials, since the exam is open book. The PSE Cheat Sheet pairs well with this stage, and the practice test helps you check which topic clusters still slow you down. This five-week split is a planning suggestion, not an issuer requirement; there is no verified mandatory preparation-hour total.
Eligibility, Fees and Renewal in Brief
Content mastery is only half the path. The catalog requires STEM college or university transcript or diploma evidence, qualifying engineering experience assessed against nine years, a current resume and an ethics agreement.
| Experience credit | Value |
|---|---|
| Accredited four-year engineering qualification | Four years |
| Each satisfactorily completed accredited engineering year | One year |
| BSET | Two years |
| Engineering postgraduate study | Up to one year |
| Qualifying teaching | Up to two years |
| Combined education/teaching credit cap | Five years |
Other curricula are individually evaluated. Published Engineer fees are a $50 application, $260 certification and $150 annual renewal, so the initial application-plus-certification outlay works out to $310 (a calculated total, not a separately quoted exam-only fee). The currency is shown as dollars without an explicit USD label, and no member/non-member split is published. Renewal requires 30 CPD hours per 12-month certification period, with evidence. For the full breakdown see PSE Certification Cost 2026 and PSE Requirements 2026.
Frequently Asked Questions
No official weights are published. The 25 headings are issuer-published Examination Topics, and the retrieved sources give no percentages or identified highest-weighted topic. Prepare for all of them.
The written exam has 50 multiple-choice questions with four hours allowed. It is open book and open notes, a scientific calculator is permitted, and the passing criterion is a 70% average.
The global catalog supplies the headings used here, including Creepage and Military and Civil Electrical Safety Standards. Equivalence with the Japanese exam form is unverified, so use the global catalog as your source.
A 90-day wait applies before a retake. Results are issued within 10 working days, so you can review weaker topic clusters before the next attempt. See PSE Pass Rate 2026 for what data is available.
That depends on your role and market. Compliance, certification and test-lab careers benefit most; weigh costs and outcomes in Is the PSE Certification Worth It? and PSE Salary Guide 2026.