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Industry Survey: Diverted Neutral Currents & Site Reality

Introduction: We know there is often a gap between textbook theory and the reality of working on live sites. This survey focuses on how the electrical, plumbing, and gas industries handle the growing risk of Diverted Neutral Currents (DNC) and supply-side faults. Your responses are 100% anonymous. We are not looking for the “correct” textbook answers; we want the honest truth about the pressure, equipment, and habits you experience on site every day so we can push for better industry support.

Section 1: Professional Profile

This section establishes the context of the respondent's experience level and daily risk factors.

1. What is your primary trade? (Crucial for cross-referencing data) *ElectricianPlumberGas EngineerHVACMulti-tradeOther (Please specify)

2. How long have you been working in your industry? *Apprentice / 1–5 years6–15 years15+ years

3. What is your primary sector of work? *DomesticCommercialIndustrial

4. How frequently does your work involve installing EV charge points, solar PV, or heat pumps on TN-C-S (PME) systems? *WeeklyMonthlyRarelyNeverUnsure of earthing arrangements

Section 2: Essential Safety Equipment & Habits

Focusing on the "Everyday Carry" (EDC) and standard safety protocols.

5. What voltage/testing equipment do you routinely carry in your van/toolkit? (Select all that apply) *Two-pole voltage tester (e.g., Fluke T6, Kewtech KT1780)Proving unitMultimeterSingle-pole voltage indicator (voltstick)None of the above

6. If you use a voltage indicator (voltstick), is it: *Contact type (must physically touch the conductor)Non-contact / proximity type I don't use a voltage indicatorUnsure

7. Do you own a calibrated two-pole voltage tester with a proving unit? *Yes, I own oneYes, company-providedNo — too expensiveNo — never felt I needed oneNo — other reason

8. Do you carry lock-off devices for isolators/breakers? *AlwaysSometimesRarelyNever

Section 3: Isolation & Testing Practices

Understanding real-world application of safe isolation procedures.

9. How often do you perform full safe isolation (including proving dead with a two-pole tester) before working on a circuit? *Always (100% of the time)Most of the time (~75%)Sometimes (~50%)Rarely (~25%)Never / Not applicable to my work

10. In your opinion, what is "safe isolation"? *Switching off at the consumer unit/distribution boardSwitching off + testing with a voltstickFull procedure: isolate, lock off, test with two-pole tester between all conductors, prove tester before & afterUnsure / varies depending on the job

11. Have you ever tested for diverted neutral currents (e.g., measuring voltage between neutral and earth with the main switch off)? *Yes, I do this regularlyYes, occasionallyYes, but only once or twiceNo — I don't know howNo — I don't have the right equipmentNo — never thought about it

Section 4: Training, Awareness & Workplace Pressure

Exploring gaps in education and real-world obstacles to best practice.

12. Have you received formal training on diverted neutral currents and supply-side faults? *Yes — comprehensive trainingYes — briefly mentioned in coursesNoUnsure / Can't remember

13. Do you feel your training adequately prepared you for the risks of working on TN-C-S (PME) systems? *YesSomewhatNoNot applicable to my work

14. Have you ever felt pressure (from time constraints, management, or clients) to skip or rush safety procedures? *FrequentlyOccasionallyRarelyNever

15. Is the cost of proper safety equipment (e.g., two-pole testers, proving units) a barrier for you or your company? *Yes — it's a significant barrierYes — somewhatNoNot applicable — company provides all equipment

16. Have you ever had a client refuse to allow you to fully isolate a system (e.g., switching off the main supply)? *Yes — multiple timesYes — once or twiceNoNot applicable to my work

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