hot tub supply...

[Welshsparky]

Wired a hot tub in 6 months back ... 6mm cable to isolator from db , from isolator to hot tub. the hot tub is only pulling 16 ap but id put a 6mm in asthe customer said they may upgrade in the future.

just had a phone call from the customer to say their is a funny smell from isolator, customer opened isolator and their hasbeen a blow off some sort, RCD did not trip

Any ideas why this would happen?

All connections were as tight as can be and all relevant tests were carried out upon completion

 

[KAS1]

Sounds like he's panicking you to get you round there on a Sunday to sort something else out for him IMO

 

[Jase_82]

What's the mcb size in the house? B16?

 

[Welshsparky]

yes mate

 

[Engineer54]

If it is a blow out as you call it, then one would expect the RCD to have tripped and failing that, the MCB to have tripped!! On the other hand it could be a loose connection, and burning around the affected connection, despite what you have stated about all connections being tight. You'll only know yourself, when you go round to check the system out...

 

[shocking_eg]

sounds like a loose connection or damp in the isolator

 

[glasgospark]

Usually fit type c mcbs for hot tubs 6mm overkill

 

[GMES]

as already said it could be a loose connection , could be the terminal itself on the isolator was it a new isolator or a used one that as been tightened to many times before, just trying to think of obvious reasons.

 

[Heisenberg]

Wired a hot tub in 6 months back ... 6mm cable to isolator from db , from isolator to hot tub. the hot tub is only pulling 16 ap but id put a 6mm in asthe customer said they may upgrade in the future.

just had a phone call from the customer to say their is a funny smell from isolator, customer opened isolator and their hasbeen a blow off some sort, RCD did not trip

Any ideas why this would happen?

All connections were as tight as can be and all relevant tests were carried out upon completion

Are you 100% sure it's only 16A? Seems quite low.

The only hot tub I've had any experience with was a Legacy branded one and that was rated at 50A, but it was nothing special, just your standard 6 seater.

 

[Engineer54]

Are you 100% sure it's only 16A? Seems quite low.

The only hot tub I've had any experience with was a Legacy branded one and that was rated at 50A, but it was nothing special, just your standard 6 seater.

Not too sure about 50A, but certainly a lot more than 16A!! Takes a fair bit of heating does that amount of water in one of those spar's. Then you have all the separate pumps supplying different jet systems. Can't really see how a 16A breaker will be able to hold in myself!!

 

[shocking_eg]

Are you 100% sure it's only 16A? Seems quite low.

The only hot tub I've had any experience with was a Legacy branded one and that was rated at 50A, but it was nothing special, just your standard 6 seater.

There's a lot of hot tubs out there designed to be low current so save the need of running mahoosive supply's to them.

Our one has a dip switch to change it from 32A to low current 13A mode

 

[Engineer54]

There's a lot of hot tubs out there designed to be low current so save the need of running mahoosive supply's to them.

Our one has a dip switch to change it from 32A to low current 13A mode

How long does that spar need to heat up, with over half the nominal current switched out?? lol!!

 

[shocking_eg]

How long does that spar need to heat up, with over half the nominal current switched out?? lol!!

About a day ! Lol

 

[Engineer54]

About a day ! Lol

Sounds about right!! lol!! You sure that low setting isn't for turning the water over (through the filter) during non use times, eg maintenance only position??

 

[i=p/u]

Vibrations on connections with all the loving going on. Maybe should of used them bendy washers

 

[shocking_eg]

Sounds about right!! lol!! You sure that low setting isn't for turning the water over (through the filter) during non use times, eg maintenance only position??

Lol yep !

Nope there's also an Eco mod for when leaving the hot tub over winter

Drops temp to 12 degrees and runs pumps 24/7

With low current mode on the heater doesn't come on at the same time as the high speed pump

On 32a mode everything can run at once

 

[Engineer54]

Lol yep !

Nope there's also an Eco mod for when leaving the hot tub over winter

Drops temp to 12 degrees and runs pumps 24/7

With low current mode on the heater doesn't come on at the same time as the high speed pump

On 32a mode everything can run at once

Sod that, cheaper and easier to empty and mothball the dam thing over winter!! lol!!

 

[dan86]

winter is the best time to use a hot tub!

 

[Engineer54]

winter is the best time to use a hot tub!

Rather you than me, if were talking about in the UK!! You'd need pretty deep pockets to keep one at 12c during the winter months, let alone bringing the water temperature up to working levels and maintaining that level during use!! lol!!

I'll agree with you, if were talking about somewhere around the Med though. lol!!

 

[MDJ]

Are you 100% sure it's only 16A? Seems quite low.

The only hot tub I've had any experience with was a Legacy branded one and that was rated at 50A, but it was nothing special, just your standard 6 seater.

Agree, I wired up a similar tub myself and it needed a 16mm2 cable on a 50 amp breaker down to it in the garden from the house, I assume yours is a small bath tub type then and not a garden 6 seater if only 16 amp?