The short answer
For most full-size solid (hard-shell) hot tubs, yes — you need a qualified electrician. Tubs with multiple pumps and a heater usually need a dedicated supply hardwired from the consumer unit, commonly 32 amp, with RCD protection (a Type A RCD at 30mA is the typical minimum) and a weatherproof isolator near the tub. That electrical work is notifiable under Part P of the Building Regulations and should be carried out and certified by a qualified electrician. The main exception is a small inflatable or plug-in tub that runs from a standard 13-amp socket — though even then it should be on an RCD-protected outdoor circuit. Because water and electricity are involved, this is not a job to improvise.
Hot tub electrics are a safety matter, not a formality. Most solid tubs need a dedicated, RCD-protected supply fitted and certified by a qualified electrician, and the work is notifiable. Here is what that means in practice.
The electrical rules in brief
- Most solid tubsdedicated supply, qualified electrician
- Typical supply32 amp hardwired
- RCD protectionType A, 30mA minimum (typical)
- Regulationnotifiable under Part P
- Plug-in inflatable13-amp socket, RCD-protected
What a solid hot tub needs
A full-size solid tub with several pumps and a heater draws too much for a standard socket, so it usually needs a dedicated circuit hardwired from the consumer unit — commonly a 32-amp supply on a suitable cable, with a weatherproof rotary isolator fitted near the tub. RCD protection is required for safety, typically a Type A RCD at 30mA as a minimum, because the tub mixes water with electrical pumps and heaters. This work should be designed, installed and tested by a qualified electrician who can issue the appropriate certificate.
Part P and when a plug-in is the exception
Installing or altering the electrical supply for a hot tub is notifiable under Part P of the Building Regulations in England and Wales, which is why it should be done by a qualified electrician who can self-certify or notify the work. The main exception is a small inflatable or plug-in tub designed to run from an ordinary 13-amp socket — that does not need a dedicated supply, but the outdoor socket it uses should still be RCD-protected. If in doubt, check the tub manufacturer's electrical specification and have an electrician confirm what your install needs.
| Tub type | Electrical supply | Electrician needed? |
|---|---|---|
| Full-size solid | dedicated, often 32 amp, RCD | Yes (Part P notifiable) |
| Plug-in inflatable | 13-amp socket, RCD-protected | For the RCD outdoor circuit |
| Any tub | must be RCD-protected | Recommended |
General guidance — confirm your tub's electrical specification and your install with a qualified electrician. Sources: Total Skills UK and Checkatrade.
Want the electrics quoted properly?
We'll match you with a vetted hot tub supplier or installer who specifies the electrical supply, arranges RCD-protected, Part P-compliant work, and sets it out clearly in the quote.
Frequently asked questions
Do I need an electrician to install a hot tub?
For most full-size solid tubs, yes. They need a dedicated, RCD-protected supply hardwired from the consumer unit, which is notifiable under Part P of the Building Regulations and should be installed and certified by a qualified electrician. A small plug-in inflatable can use a standard 13-amp socket, which should still be RCD-protected.
What electrical supply does a hot tub need?
Full-size solid tubs commonly need a dedicated 32-amp supply with RCD protection (typically a Type A RCD at 30mA minimum) and a weatherproof isolator near the tub. Small inflatables can run from a standard 13-amp socket on an RCD-protected outdoor circuit.
Is hot tub electrical work notifiable under Part P?
Yes. Installing or altering the supply for a hot tub is notifiable under Part P of the Building Regulations in England and Wales, so it should be carried out and certified by a qualified electrician.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on the tub, its insulation and your electricity tariff. They are guidance, not a quotation.