When it comes to preparing for a hot tub there are 3 points to consider.
1: Access to the house/garden for the delivery.
2: A concrete/strong base for the hot tub to be placed on.
3: Electrical connection to power the hot tub.
This article concentrates on the 32 amp ( not 13 amp ) electrical connection with the 5 points below taken from the image to this news story,
1: Isolator position is close to the hot tub and also easy to access (not hidden or low down)
2: Power cable is 6mm width and hardwired into the hot tub.
3: The power cable has been trunked under the decking so reduces the risk of tripping over the cable.
4: The flooring has been designed so it's easy to remove in case of any future service on maintenance to the electric cable.
5: The power source is 32 AMPs
These ideas are simple and effective, the result is a streamlined connection with all elements of safety taken into account. From the isolator to the trunking, if you're looking to make a connection in preparation for a hot tub.