How to use electrician tools safely
Updated: October 2026
Knowing how to use electrician tools safely starts before you take an insulated screwdriver from its case. The first task is to identify the correct circuit, isolate it, secure the isolation and prove every relevant conductor dead with suitable equipment. A handle marked 1,000 V is a precaution against electrical danger. It is not permission to work on a live UK 230 V installation. The products in our [electrician tool kit comparison](/hub/tool-accessories/electrician-tool-kit) are hand-tool sets, and where they include a tester it is generally described as a test screwdriver or bulb tester. Treat safe isolation as a separate system rather than another feature in the box. A qualifying purchase can earn a commission at no extra cost to you.
Knowing how to use electrician tools safely starts before you take an insulated screwdriver from its case.
Knowing how to use electrician tools safely starts before you take an insulated screwdriver from its case. The first task is to identify the correct circuit, isolate it, secure the isolation and prove every relevant conductor dead with suitable equipment. A handle marked 1,000 V is a precaution against electrical danger. It is not permission to work on a live UK 230 V installation. The products in our electrician tool kit comparison are hand-tool sets, and where they include a tester it is generally described as a test screwdriver or bulb tester. Treat safe isolation as a separate system rather than another feature in the box. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Tester | Insulation | Screw heads | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Wera Wera Kraftform Kompakt W1 | Phase tester | VDE holder and blades | Interchangeable blades | 9.6 | about £123.51 | View offer |
 ArmaKit ArmaKit AKVDE-14t | Voltage tester | IEC 60900 named | Flats and PH0–PH2 | 9.6 | about £37.95 | View offer | |
| Best value |  Tolsen Tolsen 38016 VDE screwdriver set | Not listed | VDE, 1000 V claimed | PZ, PH, slotted, Torx | 9.2 | about £19.95 | View offer |
On this page
Use the tools only after the circuit is dead
Regulation 14 of the Electricity at Work Regulations 1989 requires three things before work on or near live conductors: it must be unreasonable for the conductor to be dead, reasonable to work live, and suitable precautions must be taken. Owning VDE screwdrivers does not satisfy that test, and convenience is not a reason to leave the circuit live.
For ordinary maintenance, plan dead work. Identify every supply, and control the isolation yourself rather than trusting a label. If you cannot tell which device isolates the circuit, stop and use a competent electrician. Insulated tools are an extra safeguard if the insulation is intact. The VDE or IEC 60900 guide explains the markings.
Follow a short safe-isolation sequence
Identify the circuit, the correct point of isolation and anything that could restore the supply. Check that your voltage indicator, proving unit, lock-off device and warning label are suitable. A multimeter or non-contact stick may help other diagnostics, but HSE guidance does not treat them as the preferred instruments for proving dead.
Prove the voltage indicator on a proving unit, switch off the correct isolator, lock it off and keep the key, then attach a warning notice. A breaker that can simply be switched back on is not secure isolation. Test between all relevant combinations at the point of work, then prove the indicator again so you know it did not fail during the test. Electrical Safety First and SELECT publish fuller procedures. Training and the maker's instructions take priority over this summary.
Only then use the hand tools. Seat a PZ2 tip in a PZ2 screw rather than forcing a Phillips tip into it. Keep fingers behind the handle's protective area and do not modify the insulation. If the terminal twists the tool or damages the screw, stop and reassess the size. For buying rather than procedure, the electrician tool kit buying guide explains why the driver profiles and plier contents matter.
Why the screwdriver tester is the wrong instrument
Several sets include a voltage test screwdriver, phase tester or bulb tester. These are single-pole devices: their indication depends on a path through the user or surrounding capacitance. They are not a substitute for a two-pole voltage indicator used across the conductors being checked. Tolsen's bullets do not list a tester at all, while ArmaKit, both BILITOOLS sets, FOURROBBER and Wera list a screwdriver-style tester.
GS38 covers electrical test equipment used by electricians. Its buyer-facing principles include insulated probes, finger barriers and limited exposed metal at the tip: no more than 4 mm, with 2 mm or less recommended. Prove that indicator immediately before and after checking for dead.
A non-contact stick can suggest voltage may be present. A failure to indicate is not evidence that conductors are dead. Keep a suitable indicator and a proving source as safety equipment, not as extras in the screwdriver case. BS EN IEC 60900 does not turn a 1,000 V driver into a tester, and UK mains at a nominal 230 V AC do not justify contact with a live conductor.
Check each tool, then know when to stop
Inspect insulated tools before use and remove damaged items from service. Look for cuts, splits, deep abrasions, heat damage or insulation that has pulled away from the metal. Check that the identifying marks remain readable and that interchangeable blades lock securely into their handle. Dirt and moisture can also undermine safe handling, so clean and store tools according to the maker's instructions rather than putting them away wet or contaminated.
Stop the job if you cannot find and secure the isolator, cannot obtain a clear proving result, discover unexpected conductors, or believe the task only works if the supply stays live. A new circuit, uncertain consumer-unit work and notifiable work are not made suitable for DIY by a 1,000 V label. The electrician tool kit for home DIY guide gives householders a clearer boundary.
Common questions
Do I switch off before using an insulated screwdriver?
Yes. For ordinary work, identify the correct supply, isolate it, secure the isolation and prove dead before using the hand tool. Insulation provides an additional precaution against error. It is not the first control and does not authorise routine live working.
What is the order for proving dead?
Check the indicator and prove it on a proving unit, switch off the correct isolator, lock it off under your control, place a warning notice, test all relevant conductors at the work point, then prove the indicator again. Follow formal training and the full applicable procedure.
Can the tester in an electrician tool kit prove dead?
Do not assume it can. The kit descriptions list screwdriver-style or single-pole testers rather than a complete two-pole voltage indicator and proving unit. A neon indication, or lack of one, is not the same as proving every conductor dead. Buy the indicator separately.
What is a proving unit for?
A proving unit provides a known source against which you check the voltage indicator immediately before and after the dead test. The first check confirms the indicator works. The second confirms it did not fail while you were testing the circuit.
What damage should I look for?
Check for splits, cuts, deep wear, contamination, loose blade retention and unreadable safety markings. Do not tape over damaged insulation and return the tool to service. Remove it and follow the manufacturer's replacement or inspection guidance. Tape is not a repair.
When should a professional take over?
Stop when you cannot positively identify, isolate, lock off and prove the circuit dead, when the work is notifiable, or when you do not understand the conductors present. If the only apparent method involves keeping the supply live, obtain competent help.
Related pages
Sources
Public UK sources for live working, proving dead and isolation. Prices are the figures stored with these listings, not a live amazon.co.uk page.
- Electricity at Work Regulations 1989, regulation 14 (retrieved 17 October 2026)
- HSE GS38, electrical test equipment for use by electricians (retrieved 17 October 2026)
- HSE HSG85, electricity at work: safe working practices (retrieved 17 October 2026)
- BSI, BS EN IEC 60900:2018 (retrieved 17 October 2026)
- Electrical Safety First, Best Practice Guide 2 (retrieved 17 October 2026)
- Electrical Safety First, DIY advice (retrieved 17 October 2026)
- SELECT, steps to safe isolation (retrieved 17 October 2026)
- Maun Industries, is VDE a legal requirement? (retrieved 17 October 2026)