Electrician interview questions and practice.
Installs, maintains and repairs electrical wiring, equipment and systems in homes, buildings and industrial sites.
No card for the taster. Full interviews are paid one at a time. Nothing renews.
Last reviewed
This page is still being written: no authored question bank for this competency family. The role is fully supported in the interview itself; only the published question bank is outstanding.
What interviewers for Electrician actually ask
The question bank for this role is still being written. These are the first three competencies in the model the interview is scored against.
Isolates, locks out and proves dead before working on electrical, gas, steam or pressurised systems, follows permit-to-work rules, and refuses to work live or unsafely regardless of pressure.
Diagnoses electrical, plumbing or HVAC faults methodically - symptoms, drawings, measurements, elimination - rather than swapping parts, and explains the root cause.
Installs to the applicable standards (e.g. SANS 10142 wiring code, SANS 10252 plumbing, gas regulations, manufacturer specs), sizes conductors, pipes and protection correctly, and produces work that passes inspection.
What they are really assessing
Interviewers rarely score whether you seemed nice. They score against a model like this one, usually without telling you it exists. Each competency has a weak, adequate and strong shape, and the difference is almost always the level of specific detail you volunteer without being asked.
Safe isolation, lockout & permit-to-work
Isolates, locks out and proves dead before working on electrical, gas, steam or pressurised systems, follows permit-to-work rules, and refuses to work live or unsafely regardless of pressure.
- Weak
- Says they 'always switch off first' but cannot describe the isolate-lock-test sequence, a permit they worked under, or a time they refused to proceed.
- Adequate
- Describes lockout-tagout and testing for dead correctly, but cannot give a specific example of pressure to cut corners or a near miss and what they did about it.
- Strong
- Recounts a specific job: the isolation points, lock and tag, proving dead with a tested instrument, the permit and who signed it, a time someone wanted them to work live or skip a step, how they refused, and the outcome.
Fault finding & systematic diagnosis
Diagnoses electrical, plumbing or HVAC faults methodically - symptoms, drawings, measurements, elimination - rather than swapping parts, and explains the root cause.
- Weak
- Describes fault finding as 'checking until you find it', cannot walk through a real fault step by step, or jumps straight to replacing parts.
- Adequate
- Describes a real fault and how it was fixed, but the diagnostic steps are partly missing (what was measured, what was ruled out, why) or root cause is not addressed.
- Strong
- Walks through a specific difficult fault: the symptom, the drawing or schematic consulted, each test and reading, what was eliminated, the root cause found, the repair, and how a repeat was prevented.
Installation to code & standards
Installs to the applicable standards (e.g. SANS 10142 wiring code, SANS 10252 plumbing, gas regulations, manufacturer specs), sizes conductors, pipes and protection correctly, and produces work that passes inspection.
- Weak
- Cannot name the standard governing their work or give a concrete rule from it (e.g. earth leakage, bonding, pipe fall, trap seals) or an example of an installation they did to it.
- Adequate
- Names the relevant standard and describes an installation, but is vague on sizing, protection or test values, or on what an inspector actually checks.
- Strong
- Describes a specific installation: the load or demand calculation, cable or pipe sizing, protection or venting chosen, the tests done (insulation resistance, earth continuity, pressure test) with values, and the compliance certificate issued.
Testing, commissioning & certification
Carries out the required tests, records results honestly, commissions systems and issues or supports Certificates of Compliance only when the work is genuinely compliant.
- Weak
- Says the work 'gets tested' but cannot name the tests, the instrument, acceptable values or the certificate involved; unclear about who may sign.
- Adequate
- Lists the tests done on a typical job and the certificate, but cannot describe a case where results were marginal or failed and what they did.
- Strong
- Describes tests with instrument and typical values, a specific case where a result failed or was marginal, how they investigated and fixed it before signing, and how they handled a client or boss who wanted the certificate anyway.
Customer-facing conduct on site
Explains the problem and options to a customer or facilities manager in plain language, gives realistic time and cost expectations, and leaves the work area clean and the customer informed.
- Weak
- Talks about 'being polite' but cannot give an example of explaining a technical problem to a lay customer or handling a complaint about cost, delay or mess.
- Adequate
- Gives an example of explaining a job to a customer but is vague on how options and costs were presented or how a difficult conversation ended.
- Strong
- Recounts a specific customer interaction: the fault explained in plain words, the options and prices given, how an unhappy customer or scope change was handled, and evidence of the outcome (repeat call-outs, sign-off, feedback).
Reliability, time-keeping & job completion
Turns up on time with the right tools and materials, completes jobs in the time quoted, records work accurately on job cards, and does not leave jobs half done.
- Weak
- Claims to be reliable with no detail on how they prepare for a job, how many call-outs they complete a day, or what they do when a job overruns.
- Adequate
- Describes preparing for jobs and a case of a job overrunning, but is vague on communication with the office or customer or on job card accuracy.
- Strong
- Describes a concrete routine (van stock, job sheets, pre-call), first-time-fix or jobs-per-day figures, a specific overrun and how the office and customer were kept informed, and what their records looked like.
Coordinating with other trades & supervisors
Plans work around other trades on site, protects and does not damage others' work, raises clashes early and takes instruction from the site supervisor while defending safety and code.
- Weak
- Says they 'get on with everyone' but cannot describe a specific clash with another trade, a sequencing problem or a disagreement with a supervisor.
- Adequate
- Describes a clash or conflict with another trade and how it was resolved, but does not explain what they did to prevent it or how they escalated.
- Strong
- Gives a specific example: the clash (e.g. ducting through a cable route, plumbing before slab), how they raised it, the compromise reached, who decided, and how they changed their planning afterwards.
Reading the questions is the easy half. Try answering three of them out loud, to someone who follows up.
Try 5 minutes freeWhat your 30 minutes covers
The same shape as a real first-round interview, pitched at mid-level Electrician and scored throughout.
Warm-up, then Motivation & fit
Build rapport, settle nerves, and get a short walk-through of your background. Why this role, why this employer, and what you are actually looking for.
Your experience
Two or three real situations from your CV in depth: context, what you did, what happened, what you would change.
Pitched at mid-level scope: experienced artisan: runs jobs end to end including quoting materials, commissioning and certification (where registered), and mentors apprentices.
Role-specific questions
The core competencies and domain knowledge for the role, with follow-ups on anything vague.
Drawn from this role's domain: safe isolation, lockout-tagout and proving dead; permit-to-work systems, sANS 10142-1 wiring code essentials: earthing, bonding, earth leakage, circuit protection and certificate of Compliance rules and what an inspector checks, and the rest of the competency model.
Your questions, then Wrap-up
Your questions for the interviewer, and yes, they are assessed. Next steps and a clean finish.
What changes with seniority
The questions barely change between levels. What changes is the answer they will accept.
| Junior | Mid | Senior | |
|---|---|---|---|
| Scope of ownership | Newly qualified artisan (trade test / Red Seal or equivalent): completes routine installations and repairs independently, under a senior artisan or supervisor for complex or certified work. | Experienced artisan: runs jobs end to end including quoting materials, commissioning and certification (where registered), and mentors apprentices. | Senior artisan or team leader: allocates jobs, checks quality of others' work, handles the difficult technical calls and is the registered person for certification. |
| Tolerance for ambiguity | Handles standard faults and installations alone; escalates unusual faults, design questions or anything outside their certification. | Diagnoses unusual faults and adapts installations to site conditions; knows when a design or engineer sign-off is needed. | Resolves technical disputes, interprets standards for edge cases, and takes responsibility for the compliance of a team's work. |
| People leadership | May supervise an apprentice or helper on a job. | Leads a small team on larger jobs; coaches apprentices and juniors. | Leads and develops several artisans and apprentices; addresses poor workmanship or unsafe behaviour directly. |
| Who they deal with | Supervisor, customers or facilities staff, storeman, other trades on site. | Site supervisors, customers, building managers, inspectors, suppliers. | Maintenance or projects manager, clients, engineers, inspectors, suppliers. |
What your report would say
Every competency above scored from your own answers, the sentence that cost you quoted back, and your weakest answers rewritten the way a strong Electrician would have said them.
- Describes a specific installation: the load or demand calculation, cable or pipe sizing, protection or venting chosen, the tests done (insulation resistance, earth continuity, pressure test) with values, and the compliance certificate issued.
The format, not a result. Scores on your report come from what you actually said.
Is the AI interviewer realistic? See a full sample report