Most hot tubs typically require more power than a standard 13-amp plug can provide. Here are a few reasons why hot tubs often don't use 13-amp plugs and the exceptions to this:

 

 

Power Requirements:

Hot tubs need significant power to heat water, run jets, and operate filtration systems.

For a hot tub to operate with both a heater and a pump at the same time, a continuous power supply of 16 amps or more is required. This exceeds the capacity of a standard UK 13-amp plug, and necessitates a higher amperage circuit.

The exception to this when a hot tub draws less than 13 amps at any time. If the manufacturer confirms that the hot tub can operate with a 13 amp plug, the socket should be waterproof, and the plug should be protected by an inline circuit breaker and not be connected via any type or a extension cable.

 

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Electrical Load:

A 13-amp plug is generally sufficient for small appliances and devices that don't pull much current continuously. Even hot tubs that are designed to be connected via a 13 amp, should not be used for more than 2 to 3 hours continuously.

Hot tubs, with more than one pump and larger heaters, would constantly draw above the maximum capacity of a 13-amp outlet, leading to potential overheating and risk of tripping the circuit.

These hot tubs require a dedicated 32 amp supply.

Continuous Use:

Even 13amp hot tubs often operate for extended periods, maintaining water temperature and circulation.

This continuous demand forn13amp hot tubs is better supported by a dedicated higher-amperage electricity supply, commonly through hardwired connections or specialised outdoor socket installations.

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Safety Considerations:

The risk associated with an overburdened a1 3amp plug includes overheating and potential fire hazards.

Using a more robust electrical setup with higher amperage ensures safer and more reliable operation of the hot tub.

Professional Installation:

Many hot tub installations require a qualified electrician to ensure proper wiring and meet local electrical codes.

This often involves installing a dedicated circuit with a suitable amperage rating (typically 16, 32, or even higher), which cannot be accommodated by a 13-amp plug.

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Ultimately, using a higher amperage system with appropriate safety mechanisms better supports the power needs and long-term operation of hot tubs.