Was asked to install power in preparation for a hot tub company to install hot tub and make final connections Specifications from hot tub company are 20A supply required allowance for inrush current 25A 6mm cable required I only saw the spec after i did the installation and was told by the client that a 32A supply was required So i installed 4mm T/E to isolator . Hot tub company came along and said they will not connect as the cable should be 6mm. As far as i am aware 4mm clipped direct is good for 32A
Strange tbqh - maybe its something to do with using a type c mcb and 6mm would only allow the correct Zs (Zs within tabulated values) with use of said?
Why should Zs be an issue if you are protecting with a 30mA RCD, a 20A supply will only be capable of powering a 4 kW heater and a motor it's going to take a long time to heat up. Hot tub installations should be treated as swimming pools for earthing and shock protection methods. If the voltage drop calc is OK then the cable should be fine, unless they are concerned over cable heating on short circuit.
You said in your op that the hot tub company specified a 20A circuit so why are they now asking for a 32A circuit? This silly game of "we won't connect it" is laughable.
Dunno Bob - never cabled a hot tub so just guessing and stuff. After reading up a tad it does seem like 6mm is the norm - why? I haven't got a clue. It seems that a dedicated circut is imperative (so no jacking off the rf and stuff) Dont know nowt else apart from rcd protection is required and imperative, also of course a rotary isolator fitted more then 2 mtrs away from tub which is logical anyway tbqh..
Hi JP, I have never fitted one either but I am aware of the regs for swimming pools. It is a similar installation but in miniature, wet people, outside the equipotential zone, un supervised. Seems like all of the bad stuff in one go.
Had a similar one a few years ago. Client required a supply for a sunbed. Asked for spec for sunbed and was reliably informed the model to be installed could be connected to single phase supply. Installers arrive with sunbed and ask where the 3P supply is? Needless to say they returned once the correct supply and isolator was installed. Moral - check with the equipment supplier what the client is actually needing.
Hot tubs! Every one I have fitted, they switch it on, use it, first bill drops on the door mat, its turned off again Cost a FORTUNE to run, unless you have PV on the roof to Offset the cost,leave them on Ebay Well chavvy IMO
My next door neighbour asked if I was having a hot tub installed in the garden (gawd knows why), she is rather chavvy!!
Never likes tubs... too many chemicals. Various downsides. costs, Chemical reactions, hot tub lung, Red eye, folliculitis, thrush and Legionnaire's Disease ! Useless fad. RS
And Herpes,MRSA, Cryptosporidium (chlorine-tolerant, so takes days to die) & several thousand other germs that cause disease. Also affects swiming pools as well.
Most people will have come into contact with herpes at one time or another (HSV1). Genital herpes (more commonly HSV2) is less common in the general population. I would hope that people sharing my own hot tub did not have genital herpes. Best advice- don't go in hot tubs unless heavily chlorinated and/or you know the sexual history of all it's occupants.
You miss the point and showing your ignorance, herpes is dormant the majority of the time and is not contagious unless its active. And even if it is active, you can't catch it in a swimming pool or hot tub.