hot tub supply in domestic dwelling 32A, 100A supply

[ian w j]

Help Needed !!
The wife has just purchased a hot tub off eBay! I am a spark but not a bright one!! I was just looking into what's required for the supply and they are stating 8-10kw load 32-40amp supply. To an an isolator and have Rcd protection.. yeah ok so far. I know about the zones regarding position of isolator and other equipment as per the regs, but I am stressing about the demand and diversity of the installation. I'm going to do the work and get a friend to pass it off and certify.

Currently I have a 100amp single phase domestic supply.

The dis board has:
2 x 32a rings
1 x 32a radial cooker supply with single socket(cooker is 13a socket)
3 x 6a radial light
1 x 6a smoke
1 x 6a water(no immersion heater)

I've done a diversity calc not taking into account the smoke and the heating time clock and come up with 103amps using a 32 amp supply to the hot tub.
My supply is 100amps !! Is this right??

 

[ian w j]

No offence but do you know all aspects of electrical wiring? The sparkys on site who I meet can only wire houses, when it comes to star /delta delta 690v and control circuits with relays and plc's, the don't have a Scooby do either! We all have different fields that we are good in and when I am not sure Is ask.:89:

 

[dazza1981]

No offence but do you know all aspects of electrical wiring? The sparkys on site who I meet can only wire houses, when it comes to star /delta delta 690v and control circuits with relays and plc's, the don't have a Scooby do either! We all have different fields that we are good in and when I am not sure Is ask.:89:

I agree to an extent but regardless as to what field your in this is very basic stuff ???
Only you know what your house is pulling so only you can make a decision as to whether your hot tub will overload your supply???
Say for instance your correct and your main fuse is 100 amp, do you seriously think you will pull over 100 amps at any one point????
If you are that worried why dont you switch on everything in your house and clamp it to see what your pulling !!!

 

[ian w j]

Surely when the supply company connect up they have to clearly identify the current rating of the supply! The seals aren't meant to be cut off to find this out when you do an Niceic test are they?

 

[Darkwood]

No offence but do you know all aspects of electrical wiring? The sparkys on site who I meet can only wire houses, when it comes to star /delta delta 690v and control circuits with relays and plc's, the don't have a Scooby do either! We all have different fields that we are good in and when I am not sure Is ask.:89:

With all respect here I panel design build and repair machinery but as part of my job title I strife to ensure im fully aware of any regulation changes and additions and keep up with other fields like domestic / commercial and Industrial installation I was trained in....Ive not done domestic for 10yrs but can still run rings around most regarding the regulations surrounding them, you've spent so long out of the loop you really only have yourself to blame here .... now my constructive advice is use this forum often and just scan the threads and replies often this will build back up what you have forgot... like it or not you no longer can say you are competent in domestic install which leaves a few option ... get outside help in or do a lot of homework and get the reg's book out and your purchase a few books.

Your cutout fuse could be 60amp 80amp or 100amp been the common rating in domestic the carrier stamp of 100amps is its tolerance not what it contains.

You will need to be aware of the nature of your supply as I assume this hot-tub is going outside? Correct me if Im wrong there.

Diversity in the regs is a guide-line and can often be over compensating for actual demand, you know your house and usage if unsure get a monitor maybe free from your energy supplier and monitor your usage...

Lastly give your lass a stern look of disagreement .... today a Hot-tub tomorrow a pearl necklace (Woah ...not that kind .. )

 

[Plonker 3]

Why not take a week if work and use a clamp meter every 10 minutes in your tails to your DB for that week then you will know exactly what current your house is pulling?

 

[Guest77]

No offence but do you know all aspects of electrical wiring? The sparkys on site who I meet can only wire houses, when it comes to star /delta delta 690v and control circuits with relays and plc's, the don't have a Scooby do either! We all have different fields that we are good in and when I am not sure Is ask.:89:

I consider myself an all rounder yes, however that said fair enough I get your point and there has been enough advice in this thread for me to continue further. Lastly as daft as it sounds welcome to the forum mate.

 

[ian w j]

Thought of that, just waiting for the wife to put a wash on, do the dishes, put on the tumble dryer boil the kettle and Hoover up, whilst cutting the grass! All this in the dark with all the lights on!:6:

 

[Plonker 3]

Thought of that, just waiting for the wife to put a wash on, do the dishes, put on the tumble dryer boil the kettle and Hoover up, whilst cutting the grass! All this in the dark with all the lights on!:6:

So you have just answered your own question.

 

[dazza1981]

Thought of that, just waiting for the wife to put a wash on, do the dishes, put on the tumble dryer boil the kettle and Hoover up, whilst cutting the grass! All this in the dark with all the lights on!:6:

With all the heating on full whack, every socket in use, shower on,toaster,every light on,microwave !!!!
I think your understanding what me and the lads are trying to tell you now Ian ???

 

[trev]

Thought of that, just waiting for the wife to put a wash on, do the dishes, put on the tumble dryer boil the kettle and Hoover up, whilst cutting the grass! All this in the dark with all the lights on!:6:

Sounds like she's well trained, did you break many sticks during the process?

 

[Andy78]

Thought of that, just waiting for the wife to put a wash on, do the dishes, put on the tumble dryer boil the kettle and Hoover up, whilst cutting the grass! All this in the dark with all the lights on!:6:

Don't forget to get the wife to curl her hair, straighten it, and blow dry it at the same time.... I'm sure you can manage both the hoover and the mower.... it's the same action after all.

 

[Darkwood]

TBH Ian I personally wouldn't worry about the demand of this Hot-tub you have gas heating, no shower, small demand for your oven by the sound of it possible less than 3kw if its on a plug top as I suspect no real load anywhere else...

I doubt you rarely top 20-30amps demand on a good day .... so get them trunks on and make her smile

 

[Guest77]

TBH Ian I personally wouldn't worry about the demand of this Hot-tub you have gas heating, no shower, small demand for your oven by the sound of it possible less than 3kw if its on a plug top as I suspect no real load anywhere else...

I doubt you rarely top 20-30amps demand on a good day .... so get them trunks on and make her smile

Or leave them off and make her laugh lol

 

[dazza1981]

Or leave them off and make her laugh lol

She wont see anything anyway as the lights would be out due to the main fuse blowing :8:

 

[Guest111]

It's a 100 amp, type 2 b 1361 without cutting off the seals, that's what it says on the tin!irate:

It says speke on buses but they don't.lol