Hot Tub Supply

[Ray]

Do I need a 20amp fused spur supply for a Hot Tub installation ?

[meow2222]

Whats the rating plate on the hot tub heater say? I suspect the answer will be no though, as a 20A load on a spur on a ring isnt really a good idea..

NT

[Ray]

Have not bought the hot tub yet just getting the electrics sorted.

Supply is coming direct from the CU, it is 4mm armoured cable going to an outside log cabin.

[manatbandq]

So, do you think we're all clairvoyants? Why not ask the hot tub supplier what kind of supply it needs?

I can see from my crystal ball that you'll probably top post again.

MBQ

[Ed Sirett]

Might be limited on Voltage drop. Max length is 4% of 230V = 9.2V

4mm² is 11mV/A/m which makes 9.2V/0.22V = 41m. So probably OK.

[Ray]

Distance from CU is 20 metres.

[zikkimalambo]

What earthing system are you using for that Log Cabin?

[The Wanderer]

Have you thought to ask the supplier/manufacturer?

[Owain]

How do you know that 4mm armoured will be adequate?

Owain

[manatbandq]

My crystal ball was correct.

MBQ