Hot Tub Installation

[nandrews87]

Hi Folks

Quick question on installing a Hot Tub which is located to the rear of a house. To the best of my knowledge I will istall as follows,

1) Circuit protected by 50 Amp MCB/RCBO
2) Cable will be 6mm SWA, Live Earth and Neutral.
3) Isolater switch will be located near the hot tub in a waterproof enclosure.

Any other recommendations or advice from someone with more experience on such installations

Cheers

 

[bugsy]

Origin of circuit?
Loading of pumps and heaters?

 

[ipf]

Hi Folks

Quick question on installing a Hot Tub which is located to the rear of a house. To the best of my knowledge I will istall as follows,

1) Circuit protected by 50 Amp MCB/RCBO
2) Cable will be 6mm SWA, Live Earth and Neutral.
3) Isolater switch will be located near the hot tub in a waterproof enclosure.

Any other recommendations or advice from someone with more experience on such installations

Cheers

50 amp mcb too large for 6mm cable. What's the flc ?

 

[ackbarthestar]

Hi Folks

Quick question on installing a Hot Tub which is located to the rear of a house. To the best of my knowledge I will istall as follows,

1) Circuit protected by 50 Amp MCB/RCBO
2) Cable will be 6mm SWA, Live Earth and Neutral.
3) Isolater switch will be located near the hot tub in a waterproof enclosure.

Any other recommendations or advice from someone with more experience on such installations

Cheers

Check your
1/ Fuse rating
2/ Cable size, probably Ok
3/ Earth fault protection..... 415.1

 

[ipf]

Sorry, misread. swa. May be OK.

 

[Guest123]

Most importantly when it comes to installing a hot tub, manufacturers instructions.

 

[Guest55]

Whats the rating ( amps or kW ) of the hot tub ?
I did a hot tub install last wk end , it was rated at 21A so only a 32A supply was needed.

50A does seem on the high side.

 

[nandrews87]

To the best of my knowledge the pump is 2050 W, this works out to be 8.5 Amps. 10 amp breaker seems small for a Hot Tub no????

 

[ackbarthestar]

To the best of my knowledge the pump is 2050 W, this works out to be 8.5 Amps. 10 amp breaker seems small for a Hot Tub no????

I believe they have heaters as well.

Some even have TVs, drinks coolers et al

 

[ipf]

Instructions time, I think. You need the full details.

 

[nandrews87]

Yeah ipf I agree, I have asked for the manufacturers instructions but still waiting on them. Anyway seems im right in the way i plan on doing it, just deciding on mcb size once I have the manufacturers instructions is all thats outstanding.


Cheers

 

[Guest55]

The hot tub will contain a heater and filter as well.
What is the total demand of the unit?
And how come you came to the decision to use a 50A mcb ?
As i said earlier i would expect it to pull 20-30A unless its a huge 10 people unit

 

[ackbarthestar]

What's the earthing system to the house?
You know where we are going here !

 

[Engineer54]

It'll be a dam big hot tub to require a 50A supply to it!! lol!!

Another thing is, that most of these hot tubs have integrated RCD protection within the control panel.
What is this hot tub going to be sitting on, decking or concrete patio/pad?? I hope they aren't intending to just sit it on bare ground/grass, now that would be a very big mistake on there part!!!

 

[UNG]

I've done a few hot tub installs and first thing I would suggest looking at is where it will be sited. Given the filled weight of a tub can be around 2 tonnes it is usual for a concrete base to be cast if this is the case get a duct installed in the base so the cable will exit the base close to the mains inlet

With regard to the load / size of MCB it depends on how many pumps the tub has most 40A supply tubs I've worked on run at about 20A - 25A with 3 pumps running and the heater on but due to the pump start up 40A is required if you want to run on a B type breaker

With regard to the siting "to the rear of the house" don't be caught out by this I did one that was a 40m run of cable under a large patio