NEN 3140 – Electric Equipment

Faulty electrical tools can cause electric shocks, fire hazards, and serious mechanical injuries. They are also a major source of unexpected downtime and liability in the workplace.

To protect employees and comply with Dutch law, all portable electrical tools must be inspected and certified in accordance with the NEN 3140 standard. HTT makes sure your equipment is safe, compliant, and ready to use.

Purpose of the Inspection :

• ✅ Detect defects, wear, or damage early—before accidents occur

• ✅ Prevent downtime due to unsafe or malfunctioning tools

• ✅ Ensure compliance with NEN 3140 (Low Voltage installations)

Types of Inspections :

1. Visual Inspection (by user, before every use)

• Damaged housing, cords, or plugs

• Dust, moisture, or contamination

• Visible cracks, overheating, or unusual noises

2. Periodic Inspection (by HTT expert, typically annual)

• Electrical measurements (insulation resistance, ground resistance, leakage current)

• Mechanical safety features (emergency stop, protective covers)

• Functional test of the tool under load

• Documentation of inspection results (digital report + inspection sticker)

⚡ In high-risk environments (construction, damp conditions, heavy use), inspections may be required 1–4 times per year.

3. Post-Repair Re-Inspection
Any tool that has been repaired or modified must be inspected again before being put back into use.

Key Inspection Points :

• Cords & plugs – wear, kinks, or breaks

• Switches & moving parts – proper operation

• Housing – cracks, loose parts, overheating

• Dust & moisture protection – IP rating check

• Grounding & double insulation – compliance verified

• CE marking & nameplate – correct use confirmed

What You Receive :

After every inspection, HTT provides:

• A unique certificate for each tool, including serial number & inspection results

• An inspection sticker confirming compliance

• Digital records for easy reference during audits

Why Choose HTT?

• ✔ Certified inspectors with NEN 3140 expertise

• ✔ On-site inspections with minimal disruption

• ✔ Digital reporting & compliance documentation

• ✔ Fast turnaround to keep tools in use without delay

👉 Protect your employees and avoid compliance risks.
Fill in the contact form today, and HTT will schedule your NEN 3140 electrical tool inspection.