Strangely, I have recently inherited a hot tub! Not something many people can say and have been looking at power supplies.
All the info I can find relates to much larger tubs with 4-6KW heaters and multiple pumps. In which case 6mm swa cable and all the relevant protection / isolators which is fair enough.
However the tub I have is a plug and play type, with a three pin plug. Think of a lazy Spa, but with a wood frame. The heater is only 2KW, and the 2 speed pump is not huge and will only run the heat when on low speed. When on full speed the heat turns off.
I don't like the idea of just plugging this into an outside socket though, a hot tub on and extension lead seems like a terrible idea, and ridiculous if its legal!. Its not going to move so want to wire it in but a 32a supply seems overkill.
What I want to do is wire the tub into a wall isolator a few meters from the tub, as it should be Using the supplied hot tub cable.
Then run from the isolator to the house (clipped along a high wall) using swa (around 10m) to another junction box
Which feeds through into the house for connecting up using non armoured cable for ease. I need to have my consumer unit replaced so will get the sparky to do all the finishing up at the same time.
Question is, will the above be all ok and which thickness of cable / isolator should I use? I guessed around 20amp to allow some head room. Everything on-line screams 6mm and 32a minimum, but this thing is less powerful than a kettle?
Also, is swa the thing to use, or would sy cable be ok as it will be clipped up high to make life easier?
All the info I can find relates to much larger tubs with 4-6KW heaters and multiple pumps. In which case 6mm swa cable and all the relevant protection / isolators which is fair enough.
However the tub I have is a plug and play type, with a three pin plug. Think of a lazy Spa, but with a wood frame. The heater is only 2KW, and the 2 speed pump is not huge and will only run the heat when on low speed. When on full speed the heat turns off.
I don't like the idea of just plugging this into an outside socket though, a hot tub on and extension lead seems like a terrible idea, and ridiculous if its legal!. Its not going to move so want to wire it in but a 32a supply seems overkill.
What I want to do is wire the tub into a wall isolator a few meters from the tub, as it should be Using the supplied hot tub cable.
Then run from the isolator to the house (clipped along a high wall) using swa (around 10m) to another junction box
Which feeds through into the house for connecting up using non armoured cable for ease. I need to have my consumer unit replaced so will get the sparky to do all the finishing up at the same time.
Question is, will the above be all ok and which thickness of cable / isolator should I use? I guessed around 20amp to allow some head room. Everything on-line screams 6mm and 32a minimum, but this thing is less powerful than a kettle?
Also, is swa the thing to use, or would sy cable be ok as it will be clipped up high to make life easier?