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Topic Title: HOT TUB INDOORS
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Created On: 19 March 2019 10:55 pm
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 19 March 2019 10:55 pm
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Ruddy

Posts: 120
Joined: 16 September 2014

went to look at a job today customer wants a hotub installing in a spare ground floor bedroom tiled floor room contains sockets wall switches etc dimensions 4m square celings standard height 2.5m am i right in thinking Part 7 of BS7671 applies ie treat as indoor swimming pool etc
has anyone else had to supply internal hottub ??
 19 March 2019 11:05 pm
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mapj1

Posts: 12039
Joined: 22 July 2004

Indoors will be easier than a tub outdoors, as there will be no question of which earth the floor is referred to.
yes, it will need to be treated either like a large bath or a small swimming pool, depending which it is most like, and either of which approaches will lead to more or less the same end, and probably require the existing wiring and lighting to be re-done.

-------------------------
regards Mike
 20 March 2019 07:58 am
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Ruddy

Posts: 120
Joined: 16 September 2014

thanks for that Mike, i will be removing all sockets and light switches etc from the room and placing light switch outside the room
am i ok fitting IP65 LED bulkhead style light or will it have to be Selv with the source outside zones
and will it be permissible to fit Rotary isolator at ceiling height.
thanks
Steve
 20 March 2019 08:12 am
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Zoomup

Posts: 6117
Joined: 20 February 2014

Make everything splashproof and all insulated and all is well. Good air extraction will be required to take away the moist air. Isolation switches can be outside the room. Bathrooms can have R.C.D. protected 240 Volts permanently fixed lighting in a suitable enclosure, in zones 1 and 2 IPX4. (If exposed to water jets IPX5). All circuits serving or passing through zones 1 and 2 of the location should be 30mA R.C.D. protected.

Z.
 20 March 2019 10:18 am
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mapj1

Posts: 12039
Joined: 22 July 2004

am i ok fitting IP65 LED bulkhead style light or will it have to be SELV with the source outside zones


That will depend on how high the ceiling is and where the lights are likely to get wet - much like a bathroom, a swimming pool is also allowed to use mains voltage lighting if it is high enough up not to cause trouble (as for what it is worth in both you can have sockets if you can get far enough away from the water's edge). A quick browse of the 700 chapter and then some work with a tape measure is in order.
IF the tub is not there yet you will need to estimate its edges.
However even if the height is OK by the book, if it is all a bit close, you may feel that lower voltage is less risky - separating LED and driver is not especially difficult if the right fittings are chosen. It rather depends if the thing will be used by wild splashing teenagers or sedate grandparents, probably best to assme the worst

-------------------------
regards Mike
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