RCD for garden tools
Updated: October 2026
You are about to mow with a corded tool, the lead crosses the lawn, and the grass is still dark with dew. An RCD for garden tools is the back-up for that lead. It is not permission to work in the wet. Electrical Safety First wants an RCD with outdoor equipment, and a plug-in if the fusebox has none. The Health and Safety Executive still says a shock can be serious or fatal. Model choice is on the [RCD comparison](/hub/electrical-equipment/rcd). There is no lab test.
You are about to mow with a corded tool, the lead crosses the lawn, and the grass is still dark with dew. An RCD for garden tools is the back-up for that lead. It is not permission to work in the wet.
You are about to mow with a corded tool, the lead crosses the lawn, and the grass is still dark with dew. An RCD for garden tools is the back-up for that lead. It is not permission to work in the wet. Electrical Safety First wants an RCD with outdoor equipment, and a plug-in if the fusebox has none. The Health and Safety Executive still says a shock can be serious or fatal. Model choice is on the RCD comparison. There is no lab test.
Our top picks
| Badge | Product | Form | Trip current | Latching | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  EXNICEXI EXNICEXI NB-H3E-13 | Plug-in adaptor | 30 mA | Manual reset after a trip | 9.2 | about £13.99 | View offer |
| Best value |  Masterplug Masterplug ARCDKG-ZD | Plug-in adaptor | Not stated | Non-latching | 8.8 | about £9.94 | View offer |
 Masterplug Masterplug ILRCDNG-MP | In-line RCD | 30 mA | Non-latching | 8.6 | about £12.99 | View offer |
On this page
Dry ground, then the RCD
Deal with the weather first. Electrical Safety First says not to work while dew is on the ground, and not to mow or trim in the rain or on damp ground. An RCD does not make wet grass safe. HSE also says the risk is higher on the ground outdoors than on a dry indoor floor, and that the flex is the usual damaged part. A hedge trimmer can cut its own cable. Wait for the lawn to dry, then test. If the sheath is split or taped, unplug and replace the lead.
Fusebox, plug-in, or a unit in the lead
Prefer the RCD already in the consumer unit. If that circuit has none, Electrical Safety First's fallback is a plug-in at the socket. It protects what is supplied through it. The button sequence is on how to test an RCD. It is a button check, not a trip-time test.
The usual snag on a UK outside socket is the lid. A bulky adaptor holds the cover open. When it will not close, the in-line listing is the Masterplug ILRCDNG-MP, which states 30 mA, IP65 and BS 7071:1992. The sheet says IP65 needs connectors of an equivalent rating. The plug-in listings do not state an IP rating, so do not call them weatherproof. The Schneider Easy9 is a DIN-rail RCCB for a competent person. It is not a garden accessory.
The lead and the reel
Use an outdoor-rated lead, fully unwound, on a reel with a thermal cut-out, and store it dry. A coiled reel heats under load. The cut-out is there because a wound cable cannot shed that heat. Electrical Safety First also says one extension per socket. Do not daisy-chain a second reel.
Put the RCD at the house end if the lead itself should be protected. The adaptor goes in the wall socket and the outdoor lead plugs into the adaptor. An adaptor out by the mower leaves the run back to the house unprotected. A reel advert that says RCD included often puts that adaptor at the outer socket, which leaves the cable on the drum outside the protection. On a trimmer, keep the cable over your shoulder.
What to hold in your hand
On a tool you are holding, the supply should stay off until you reset it. Non-latching is stated on the ARCDKG-ZD, the ILRCDNG-MP and the PRCDKB. A power cut drops an active unit and leaves it dropped. That is what you want on a trimmer and what you do not want on a pond pump.
If you came for a printed 30 mA figure, the EXNICEXI states 30 mA and IEC 61540, and the ILRCDNG-MP states 30 mA. The ARCDKG-ZD does not print milliamps on amazon, though a Masterplug sheet states 30 mA. The Status states neither milliamps nor a standard. Heat and a melted pin are reasons to stop.
Common questions
Do I need an RCD to mow the lawn?
Electrical Safety First says use one with outdoor equipment, and the 2025 booklet names 30 mA. If the circuit already has it, you are using that device. If not, use a plug-in or a properly wired in-line unit, and test a portable before each use. Dew and a damaged lead are still unacceptable. HSE's limit remains: a shock can be fatal. Wait for a dry lawn and keep the cable out of the cut.
Is a plug-in enough if the fusebox has no RCD?
Yes, as that fallback, for the appliance plugged into it. It is not board protection, and it does not meet Regulation 411.3.3, which is about the installation. Put it in the wall socket so the lead is downstream. If the lid will not close, use an in-line unit you can wire, such as the ILRCDNG-MP, rather than leaving the socket open.
Where does the RCD sit on an extension lead?
At the house end, if the lead should be protected. The adaptor goes in the wall and the lead plugs into it. An in-line unit protects only downstream of the splice. A reel with an RCD at the outer socket leaves the cable on the drum outside that protection. Use one lead from one socket. Do not add a second reel.
Why will the outdoor socket lid not close?
The bodies are bulky. The EXNICEXI is 54 × 66 × 120 mm, and the ARCDKG-ZD is 11.2 × 7.2 × 5.1 cm. A lid that cannot close leaves the socket open. That is why an in-line unit exists. The ILRCDNG-MP states IP65 only with matching connectors. None of the plug-in pages states an IP code. An open lid is the enclosure no longer doing its job.
What behaviour do I want on a hedge trimmer?
Non-latching, so a power cut cannot restart the trimmer. The ARCDKG-ZD, the ILRCDNG-MP and the PRCDKB state that. Keep the cable over your shoulder and unplug before you clear a jam. The EXNICEXI states 30 mA and a reset after a trip, not the power-cut rule. The Status states neither. A trimmer that can cut its own lead needs both a sound flex and a device that stays off until you reset it.
Related pages
Sources
Public UK sources are listed below. Shelf prices and star lines are the amazon.co.uk figures checked on 19 October 2026.
- HSE: work using electrically powered equipment (retrieved 19 October 2026)
- HSE: electrical systems on construction sites (retrieved 19 October 2026)
- IET Wiring Matters: 30 mA socket-outlet mythbuster (retrieved 19 October 2026)
- IET Wiring Matters: RCD testing under Amendment 2 (retrieved 19 October 2026)
- IET Wiring Matters: which RCD type (retrieved 19 October 2026)
- Electrical Safety First: garden (retrieved 19 October 2026)
- GOV.UK: building work, replacements and repairs (retrieved 19 October 2026)
- BEAMA guide to the selection and application of RCDs (August 2022) (retrieved 19 October 2026)