Extension lead with extra large socket for hot tubs with a 13A RCD plug

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  • Regular price £29.99

Heavy duty extension lead, designed to connect hot tubs with a UK 13A RCD plug (an RCD plug is much larger than a standard 13A plug, and will have test/reset buttons). It is also compatible with standard UK 13A plugs. It is not compatible with 16A European plugs.

The extra large socket enclosure is compatible with plug RCDs, which are too large to enable the cover to shut on any other socket. It is supplied configured with the socket at the top, to allow sufficient space for the body of the RCD. Whilst almost all hot tub plug RCDs have the pins at the top of the unit (as shown below), if your RCD has the pins at the bottom, please let us know so that it can be configured appropriately. 

Available with either:

  • No RCD - Please only consider this option if you are sure that the socket you will be connecting the extension lead to is already RCD protected. See Do I need an RCD? for further guidance.
  • In-line (30mA) RCD - An RCD is a life-saving device which is designed to reduce the risk of receiving a fatal electric shock. The unit is IP66 rated weatherproof. The in-line RCD is vital if the socket you will be connecting the extension lead to is not already RCD protected. N.B. The RCD supplied may be either the one pictured, or an equivalent unit.


  • 13A UK rubberised plug.
  • Weatherproof IP66 rated single socket, suitable for an RCD plug. An IP66 rating means that the socket is protected against powerful water jets.
  • Can be wall mounted - see guide.
  • To guard against unauthorised access, the socket can be locked shut with a small padlock (max 5.5mm diameter) available here.
  • 1.5mmsq cable for high current applications, thicker than standard DIY extension leads which commonly use 1.25mmsq. The thicker cable is used in this lead to keep resistance and voltage drop to a minimum. It is for this reason that the maximum length is 15m.
  • Industrial specification H07RN-F rubber cable, specifically manufactured for harsh environments with high mechanical, chemical, water and UV resistance. Flexibility and performance is retained over a wide temperature range (-25 to 55°C). Find out what’s so special about this cable
  • Due to the relatively high current used by hot tubs, we recommend checking the plug fuse clips remain tight annually, or if the plug ever feels warm, using these instructions.
  • PAT tested.

    Further recommended precautions if used near a body of water:

    • The socket must be cited as far away as possible from any hazard and in no circumstances closer than 2m to any body of water (IET Wiring Regulation 702.32).
    • In higher risk situations, the socket must be kept 30cm off the ground (IET Wiring Regulation 702.53). 

    It is the responsibility of the user to consider the IET Wiring Regulations, manufacturer's guidance, the safety of the supply and any other relevant risks, before deciding whether to use an extension lead for any given application. This is of particular importance in circumstances where there is an increased risk of electric shock. If in any doubt, consult an electrician.