1. Cable size is determined by the length of the run to the hot tub.
2. Isolator switch must be at least two metres away from edge of hot tub where possible.
3. Leave enough cable from the isolator switch to reach the furthest away corner of the hot tub. This will allow you to choose the orientation of the tub.
Electrical Requirements
Most, if not all domestic Hot Tubs are designed for single-phase 230v ac operation
We will tell you the total load the Hot Tub will draw at full operation. A certified electrician will then be able to work out what size of cabling is required. Even the smallest Hot Tub would usually require at least a 16-amp supply. Bigger spas with 3 pumps or more generally require a 32-amp supply but this is a guide only.
All outside electrical supplies must have mechanical protection, this is either in the form of steel wire armoured cable (SWA) or suitable conduit.
The Hot Tub must have its own dedicated circuit with the correct size fuse breaker and RCD protection. See spa specifications for further details.
A rotary isolator switch not closer to the Hot Tub than 2 metres is required so that the Hot Tub can be isolated from the main supply quickly and efficiently
We generally ask for a coil of cable to be left immediately next to the Hot Tub base so that we have enough to wire it in whichever final position the customer chooses.