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Hot tub electrics UK

Updated: October 2026

You are about to plug an inflatable hot tub into a garden socket. Wet skin, bare feet and outdoor earth are a different risk from a lamp in the lounge. Hot tub electrics in the UK are the supply, the 30 mA protection and the distance from the water, not the jet count on the box. This page says what these six amazon.co.uk listings actually state, and when you stop and call an electrician. The rows are on the [hot tub comparison](/hub/steam-baths/hot-tub). The Products Compared editorial team used public guidance from the IET, NAPIT and the Planning Portal, plus the listings. A qualifying purchase can earn a commission at no extra cost to you.

You are about to plug an inflatable hot tub into a garden socket. Wet skin, bare feet and outdoor earth are a different risk from a lamp in the lounge.

Our top picks

Lay-Z-Spa Lay-Z-Spa Aruba AirJet (2–3)

Best overall

Lay-Z-Spa Lay-Z-Spa Aruba AirJet (2–3)
9.2/10about £394.74
View offer
EASE.ZONE EASE.ZONE heated spa (4–6 claim)

Alternative

EASE.ZONE EASE.ZONE heated spa (4–6 claim)
9.2/10about £667.92
View offer
MSpa MSpa Tekapo (6-seat claim)

Best value

MSpa MSpa Tekapo (6-seat claim)
6.4/10about £399
View offer
On this page
  1. 1.Wet skin and garden earth
  2. 2.What the box actually says
  3. 3.Socket, RCD, and 2 metres
  4. 4.Planning is not the same as a safe circuit

Wet skin and garden earth

A hot tub puts mains electricity next to wet skin. The IET’s Wiring Matters article of July 2021 says these appliances sit under BS EN 60335-2-60 and the installation is still BS 7671. Where a socket is used in zone 2, that article describes 30 mA protection, and an isolator about 2 metres from the water’s edge. It prefers fixed wiring. This page is not the text of BS 7671, and it is not a design for your garden.

What the box actually says

None of these six raw files names a BS 1363 plug. NAPIT’s note distinguishes a plug-and-play 13 amp supply from a larger 32 amp or 40 amp supply. The Tekapo voltage field says 230 volts AC, while the power-source field says DC/CA and the plug is blank. The EASE.ZONE bullets say 220–240 volts, again with no plug. The Aruba field says Battery Powered, and the bullets never mention a battery. The SENODON is corded electric, with no voltage and no plug. Both Generic listings leave the supply blank. NAPIT also talks about ingress ratings, IPX4 in general and IPX5 where there are water jets, and prefers a single socket rather than a trailing multi-way block. The EASE.ZONE is the row that claims water jets, so the higher splash rating is the relevant point in that note. Who states a voltage is set out in the inflatable hot tub buying guide.
Lay-Z-Spa Lay-Z-Spa Aruba AirJet (2–3)

Testsieger

Lay-Z-Spa Lay-Z-Spa Aruba AirJet (2–3)
9.2/10about £394.74
View offer

Socket, RCD, and 2 metres

Use an outdoor socket that already has 30 mA protection, or have one fitted. The IET article’s figure of about 2 metres is the isolator distance from the water’s edge, so you are not leaning over the tub to switch it off. The RCD type follows the manual. Those manuals are not in the raw files, so this page will not name Type A or Type B, or a cable size. A missing manual is a reason to stop. Lay-Z-Spa’s FAQ says you do not need an electrician to wire their kit if you already have an outdoor socket, and that the brand cable is about 7 metres. That is not permission to add a circuit, and it does not turn the Aruba’s Battery Powered field into a 13 amp plug. An extension reel under the cover is the habit to avoid. If the lead is short, move the tub or fit a socket.

Planning is not the same as a safe circuit

The Planning Portal’s hot tub note says a tub in a garden does not usually need a planning application. Listed buildings can be different, and a new building or enclosure around the tub is a separate question from the tub itself. Planning permission and electrical safety are not the same form. The Portal expects the electrical work to be done by a registered competent person. That is the building-regulations side: the circuit, the protection and the certificate, not the colour of the cover. If the property is a holiday let, the Health and Safety Executive’s HSG282 on spa pools is a different and stricter duty.

Common questions

Can I use an extension lead?
Not as the permanent supply, and not as a reel coiled under the cover. The IET article prefers fixed wiring, and a reel in the wet is both a heat problem and a splash problem. If the Lay-Z-Spa brand cable of about 7 metres does not reach, that length is still only a brand figure. Fit a proper outdoor socket, or site the tub where the supplied lead is enough.
How far should the socket be?
The IET Wiring Matters piece describes an isolator about 2 metres from the water’s edge, close enough to use and far enough that you are not leaning over the tub. Keep it clear of splash. About 2 metres is that article’s figure, not a cable size.
What RCD do I need?
Where a socket is used in zone 2, the IET article describes 30 mA protection. The type of RCD is what the tub’s manual requires, and these raw files do not include the manuals. Do not buy a Type B device on a guess. If you cannot see 30 mA protection, stop before you fill the tub.
Does a Lay-Z-Spa need an electrician?
Lay-Z-Spa’s FAQ says you do not need an electrician to wire their kit if you are plugging into a suitable outdoor socket. You do need one if that socket does not exist, if you cannot confirm 30 mA protection, or if you are adding a circuit. The Aruba listing does not confirm a BS 1363 plug, and its power field says Battery Powered, so the FAQ sentence is not a completed check of this ASIN.
Is planning permission required?
Usually not, for a hot tub placed in a garden, according to the Planning Portal. A listed building can differ, and a shed or enclosure built around the tub is a separate application. Skipping planning is not the same as skipping a competent person for the electrics.
What if the RCD trips and will not reset?
Get out, leave it off, and call an electrician. Do not cycle the switch until it holds. A trip that will not reset can be water in the equipment, a damaged lead, or a protective device doing its job. The tub stays out of use until someone who can test the circuit has said it is fit.

Related pages

How to set up an inflatable hot tub

Inflatable hot tub running costs

Hot tub

Best inflatable hot tub: Aruba, Tekapo or EASE.ZONE

Inflatable hot tub buying guide: seats, cover, plug

Sources

Public UK sources used for this comparison. Listing prices, stars and review counts are the amazon.co.uk figures saved for this set on 19 October 2026.

  1. IET Wiring Matters, Hot tubs (retrieved 19 October 2026)
  2. NAPIT, hot tub installations (retrieved 19 October 2026)
  3. BISHTA buyers’ guide for hot tubs and swim spas (retrieved 19 October 2026)
  4. BISHTA daily, weekly, monthly and annual hot tub checks (retrieved 19 October 2026)
  5. BISHTA hot tub owners’ handbook (retrieved 19 October 2026)
  6. Planning Portal, hot tub in a garden (retrieved 19 October 2026)
  7. Water Regs UK, backflow risk categories (retrieved 19 October 2026)
  8. Hot Tub Geek, inflatable hot tubs and filled weight (retrieved 19 October 2026)