Supply to garden room with hot tub

[Mabro22]

There’s is currently a 3 core 6mm swa installed/40amp breaker, the garden room has its own consumer unit with a 32amp ring circuit and 6amp lighting.
The ring circuit has a 1kw heater and a computer/ printer so not a lot of load and the lights are led -total 60w.
They now want a 32amp hot tub supply.
do I need to install a new 3 core 10mm? Or would 3 core 6mm just be ok?
thanks

 

[Markyd]

No mention of an RCD anywhere or what type of supply its on, TNS, TNCS, TT, length of cable run, a lot of details missing......

 

[Mabro22]

No mention of an RCD anywhere or what type of supply its on, TNS, TNCS, TT and are you qualified

Tnc-s, rcd in garden room consumer unit

 

[Markyd]

cable run length from house?

 

[Mabro22]

cable run length from house?

30m..

 

[Pete999]

30m..

There’s is currently a 3 core 6mm swa installed/40amp breaker, the garden room has its own consumer unit with a 32amp ring circuit and 6amp lighting.
The ring circuit has a 1kw heater and a computer/ printer so not a lot of load and the lights are led -total 60w.
They now want a 32amp hot tub supply.
do I need to install a new 3 core 10mm? Or would 3 core 6mm just be ok?
thanks

Any cable calcs ?

 

[cliffed]

30m = 6.0mm 3 c swa ducted required

 

[Alan-N]

If you assumed 40A as there is no diversity allowed for the hot tub, and you have little control over what else gets plugged into a 32A ring along with 4.4ish for the heater, then over 30m 6mm swa is OK but not great, 10mm is preferable for an energy conscious solution

 

[brianmoooore]

This kind of thread is why I always try to persuade customers that 10mm2 is the minimum that they should install to any outbuilding of any substance. So little difference in the cost, compared to that of the overall job.