Hot tub installation upgrade of cable help please

[pzool]

I am buying myself a hot tub which requires a 6mm/32 amp service. I have a garage unit which has a spare to fit this extra supply to (no problem). i have measured the diameter of the cores on the SWA cable running from the weatherproof junction box outside of my house to the garage and the flat TW&E cable running from the circuit board to the same weatherproof junction box, this measures 2.5mm!

As the tub requires 6mm, i must presume that i need to update the 2.5mm SWA and Flat TW&E to 6mm. if so though the SWA would be easy to replace, how about the cable from the circuit board to the junction box? has anyone known to sucessfully disconnect both ends and pull a new cable through with the new one attached??

To be fair the cable coming from the circuit board would be doing an 's' shape?? not too sure whether to give this a tug hoping this will pull through or the other option is to put a new cable in a route all the way around my house - not ideal.

If anything please confirm that i am required to upgrade to 6mm, any suggestions please - thank you.

 

[Leesparkykent]

Hi pzool, you may need a bigger cable than 6mm depending on a number of factors that need considering when selecting the cable. Also earthing arrangement, RCD protection, bonding, etc. It may not be as straight forward as just upgrading the cable to 6mm.

 

[Philip Of Kent]

You need to seek an approved electricians advice. Hot Tubs are a special beast as you are outside the protection of your dwelling, you shall require not only a suitable sized supply but special earthing arrangements, correct RCD rating and to ensure there is nothing else that can a path to earth within close proximity to the tub. Make sure your electrician is full registered member of the NICEIC/ECA.

 

[Paul.M]

Same as what Lee and Philip (welcome to the forum btw) have said, this needs to be designed and installed by an electrician to ensure that everything has been checked and is safe.

 

[telectrix]

hang on..... OP has measured the diameter of the cores so maybe he's got a suitable cable there. however, as previous posts, a spark needs to assess.

 

[pzool]

Thank you for the advice. i will consult a local qualified NICEIC/ECA sparky thank you.

 

[telectrix]

posting your location would help. 1 of us may be close.

 

[Spoon]

Looks like 2.5mm dia on a cable will not be 6mm Tel.

To the OP: Just out of curiosity, what size breaker is fitted on the house CU for the garage?

 

[Sintra]

Thank you for the advice. i will consult a local qualified NICEIC/ECA sparky thank you.

I thought you were a qualified spark. In one of your previous posts you state that you have the 2391 etc.

 

[telectrix]

2.5mm dia will give a csa of 4.9. so could be 4mm or 6mm, depending in how accurate his measurement was. i'm betting it's 6mm or imperial equiv. ( unless his measurement included the insulation, in which case we're up ****e street without a paddle).

 

[DPG]

You need to seek an approved electricians advice. Hot Tubs are a special beast as you are outside the protection of your dwelling, you shall require not only a suitable sized supply but special earthing arrangements, correct RCD rating and to ensure there is nothing else that can a path to earth within close proximity to the tub. Make sure your electrician is full registered member of the NICEIC/ECA.

Why NICEIC only - what is wrong with the other organisations? Daz

 

[Pete999]

You need to seek an approved electricians advice. Hot Tubs are a special beast as you are outside the protection of your dwelling, you shall require not only a suitable sized supply but special earthing arrangements, correct RCD rating and to ensure there is nothing else that can a path to earth within close proximity to the tub. Make sure your electrician is full registered member of the NICEIC/ECA.

Why would the sparks need to be NICEIC/ECA registered?

 

[Spoon]

2.5mm dia will give a csa of 4.9. so could be 4mm or 6mm, depending in how accurate his measurement was. i'm betting it's 6mm or imperial equiv. ( unless his measurement included the insulation, in which case we're up ****e street without a paddle).

Sorry mate. I was thinking the OP measures the insulation.

 

[Paul.M]

Why NICEIC only - what is wrong with the other organisations? Daz

Why would the sparks need to be NICEIC/ECA registered?

Give him a break gents , new member, first post and he is a time served HV Electrician. Probably only knows NICEIC?


Other schemes are available.

 

[Pete999]

Give him a break gents , new member, first post and he is a time served HV Electrician. Probably only knows NICEIC?


Other schemes are available.

Nuff said

 

[Philip Of Kent]

Lets not get carried away with the whole NICEIC thing gents. As we are all well aware all schemes are money makers. When i asked my local NICEIC inspector some years ago HOW a particular man ( will not use the word electrician, tradesmen or even donkey ) had managed to get registration his answer was " If we dont another scheme will " . For us time sereved up to date electricains who WILL only do the job the correct way it is demoralising when we are competing against guys that tie there horse up outside. I frequently tell customers to use NICEIC or ECA recognised memebers and as it was a Hot Tub that can not be certified under Part P, this was my recommendation. As Comment 7 said , give the location and I am sure a good qualified electrician can go and assess and help this guy out and have SAFE outcome.

 

[Paul.M]

Lets not get carried away with the whole NICEIC thing gents. As we are all well aware all schemes are money makers. When i asked my local NICEIC inspector some years ago HOW a particular man ( will not use the word electrician, tradesmen or even donkey ) had managed to get registration his answer was " If we dont another scheme will " . For us time sereved up to date electricains who WILL only do the job the correct way it is demoralising when we are competing against guys that tie there horse up outside. I frequently tell customers to use NICEIC or ECA recognised memebers and as it was a Hot Tub that can not be certified under Part P, this was my recommendation. As Comment 7 said , give the location and I am sure a good qualified electrician can go and assess and help this guy out and have SAFE outcome.

^^^ I like this guy already Same frame of mind as most of us on here. Welcome to the forum Philip, sure you will fit straight in

 

[malcolmsanford]

Give him a break gents , new member, first post and he is a time served HV Electrician. Probably only knows NICEIC?


Other schemes are available.

Also from Margate....nuff said :smile5:

 

[Paul.M]

Also from Margate....nuff said :smile5:

Never been to Margate so I dont understand the local banter joke, made me chuckle anyway.

 

[Leesparkykent]

I live about 10 mins from Margate :teeth_smile:

 

[telectrix]

I live about 10 mins from Margate :teeth_smile:

someone has to.

 

[malcolmsanford]

someone has to.

I do, well when I'm home lol

 

[Leesparkykent]

I do, well when I'm home lol

I'm Birchington.

 

[PEG]

...I had a stick of rock bought for me,from Margate,when i was 10....can i join in? :yesnod:

 

[malcolmsanford]

I'm Birchington.

Ahhh a Quex man ehhhhhh. My dentist is in Birchington.

Think we might have to meet up for a pint, been years since I have been in the Acorn, maybe because I'm not a Shepherds Neame man, though I do like a pint of "Nun's Delight"

Ramsgate man, though Pegwell now.

 

[ian.settle1]

I do, well when I'm home lol

Now we know why you work and spend most of your time abroard. LOL

 

[Philip Of Kent]

Ahhh a Quex man ehhhhhh. My dentist is in Birchington.

Think we might have to meet up for a pint, been years since I have been in the Acorn, maybe because I'm not a Shepherds Neame man, though I do like a pint of "Nun's Delight"

Ramsgate man, though Pegwell now.

Acorn now shut for good I am afraid but the new look POWELL ARMS to open very soon. Like Pegwell as the Bell Vue has to be one of the nicest most tradtional pubs around with great views.

 

[malcolmsanford]

Now we know why you work and spend most of your time abroard. LOL

Cheers Ian I always mistakenly thought of you as a gentleman with discerning taste. Gods country Kent, garden of England and all that

 

[pzool]

ok back to thread my new friends. so i was going to replace the current 2.5 core TW&E which currently has a 16amp breaker for 6mm core TW&E and a 32 amp breaker. This circuit provides power to a garage unit which has lights, socket outlets and soon to be hot tub. i will replace the swa from the garage unit to the house also from 2.5mm to 6mm cores. the garage unit will therefore have 3 breakers, 32,16 & 6. the amount of cable used from the circuit board to the garage unit is 15 meters. according to the hot tub specs it requires 6mm cores and 32 amp breaker. There are 2 rcd's in the main switch board in the house. I qualified part p, did 17th and inspection and test though didn't pursue a career in electrics - life took me another way. so i need someone to verify this for me, someone currently qualified who does this everyday. i can wire this then get someone in to inspect and test for me. Thank you fello sparks

 

[Philip Of Kent]

Clarification "pzool" the cable that leaves the CCU is 6mm 3 core SWA and this terminates into external weatherproof JB and then 2.5 T&E to garage CCU and the total length from house CCU to garage CCU is 15mts and proposed Hot Tub located on end of garage or further up the garden ?

 

[ian.settle1]

Cheers Ian I always mistakenly thought of you as a gentleman with discerning taste. Gods country Kent, garden of England and all that

I was referring to the fact you said you came from Margate

 

[Spoon]

Clarification "pzool" the cable that leaves the CCU is 6mm 3 core SWA and this terminates into external weatherproof JB ?

No mate. He has 2.5mm on a 16A breaker at present.


pzool: The best thing you can do is get an electrician in and you do all the donkey work, if you want to save money.

 

[Leesparkykent]

Ahhh a Quex man ehhhhhh. My dentist is in Birchington.

Think we might have to meet up for a pint, been years since I have been in the Acorn, maybe because I'm not a Shepherds Neame man, though I do like a pint of "Nun's Delight"

Ramsgate man, though Pegwell now.

Yeah, got married at Quex in April. The Acorn is still open but it's not a Shepherds Neame pub any more, I think Philip Of Kent meant the Crown and Sceptre in Acol has shut down and Shepherd Neame have now flogged it, the car park now has hoarding around it. You will have to let me know when you are back in this part of the world.

 

[markythesparky]

You need to seek an approved electricians advice. Hot Tubs are a special beast as you are outside the protection of your dwelling, you shall require not only a suitable sized supply but special earthing arrangements, correct RCD rating and to ensure there is nothing else that can a path to earth within close proximity to the tub. Make sure your electrician is full registered member of the NICEIC/ECA.

Or an approved electrician from another Part P body!!!