Bathroom Downlights and Fan

[atlas1]

I'm in the process of completing a bathroom re-fit and I'm now about to fit x4 down lights and an extracter fan

I've added a picture (a picture paints a thousand words)

the lights and fan are located in zones 2 & 3, my main question;

is the selection of cable correct and therefore safe?

thank you in anticipation of all those who reply

View media item 5956 [/img]

 

[bongos]

Where's the pic?

Don't forget a bathroom is a special location under Part P and that the circuit must be protected by 30mA RCD.

 

[Richard C]

In addition the requirement for RCD protection, the lights & fan must have an appropriate IP rating for the zone in which they are installed. Being a special location, this work must either be notified to your LABC, tested & certified by them or done by a Part P registered spark who will provide you with a BS 7671 compliance certificate. Judging by your questions regarding the cabling, I suspect you’ve done neither!

 

[Cremeegg]

Small point of detail - but there is no Zone 3 anymore! There are three zones but they are Zone 0, Zone 1 & Zone 2.

 

[bongos]

It looks like you have loop in wiring at the switch. There should be no need to take both feeds to a junction box.

Take one feed to the lights and another to the fan, adding in a triple pole isolator for the fan circuit.

All cables should be run in safe zones and if you do decide you need a junction box somewhere it must be accessible.

 

[atlas1]

It looks like you have loop in wiring at the switch. There should be no need to take both feeds to a junction box.

Take one feed to the lights and another to the fan, adding in a triple pole isolator for the fan circuit.

All cables should be run in safe zones and if you do decide you need a junction box somewhere it must be accessible.

Cheers

Is 0.75mm 2 core safe for this installation?

 

[atlas1]

Small point of detail - but there is no Zone 3 anymore! There are three zones but they are Zone 0, Zone 1 & Zone 2.

thanks

Having checked my book again, I can see we have an Outside Zone instead of zone 3

cheers,

my main concern is with the 0.75mm cable, is this safe to use?

 

[rssteve]

my main concern is you have not clue what so ever. Sorry but not even the slightest(sp).

what book are you looking at?

 

[Taylortwocities]

[
my main concern is with the 0.75mm cable, is this safe to use?

It depends on the protective device for the circuit.
If the rest of teh circuit is in 1.5mm then so should your new wiring....

 

[rssteve]

2 core cable, sounds like flex to me, shoulf used twin and earth, then terminate the earths in connectors if they are not needed.

 

[Taylortwocities]

Yes. The earth must be carried through right to the last light. How would you be able to test and certify the value of EFLI if you do not have an earth?
You cannot do that with 2 core. Use 1.5mm twin & earth like the rest of the circuit.

 

[atlas1]

2 core cable, sounds like flex to me, shoulf used twin and earth, then terminate the earths in connectors if they are not needed.

Many Thanks

with regards to your earlier comment about me not having a clue, your right, I'm in my early stages of learning and thats why I'm looking for advice from qualified people - better safe than sorry (although I haven't a clue of what qualifications people on this forum have, but it's likely to be more than me at the moment)

cheers

 

[atlas1]

Yes. The earth must be carried through right to the last light. How would you be able to test and certify the value of EFLI if you do not have an earth?
You cannot do that with 2 core. Use 1.5mm twin & earth like the rest of the circuit.

Many thanks I appreciate your reply

What still confuses me is why the downlights and fan only have two terminals L & N ?,

 

[Richard C]

with regards to your earlier comment about me not having a clue, your right, I'm in my early stages of learning and thats why I'm looking for advice from qualified people - better safe than sorry (although I haven't a clue of what qualifications people on this forum have, but it's likely to be more than me at the moment)
cheers

Like it or not, a bathroom is a special location & what your doing is regulated, notifyable work. If you really don’t have a clue what you’re doing (& that seems pretty obvious), you shouldn't be doing it! DIY, electrical work is permissible but you must know what you’re doing & this must be done through your LABC & then tested & certified by a qualified spark; your creating all sorts of potential problems for yourself if you don’t. As regards forum members qualifications; many are fully qualified & certified Part P sparks but there are others (including me) who have a general electrical background & training who aren’t but at least understand the basics & more, which you don’t appear to.

What still confuses me is why the downlights and fan only have two terminals L & N ?,

Dear God; please get someone qualified in to do the work before you put your families life in danger!

 

[BS3036]

What still confuses me is why the downlights and fan only have two terminals L & N ?

Many items of equipment, do not themselves require an earth, these are known as Class II, and provide their safety by double insulation, or re-enforced insulation, rather than by connecting accessible metal work to earth.

However in the UK, at least, it is a requirement that the cpc ('earth') connection is made available at each point on the circuit.

Some class II equipment has a spare terminal to join the earth in, but those that don't, require you to provide your own (e.g. choc block in a choc box in it's in the ceiling void.

(Please note that when I say 'e.g.' I mean 'for example' and not a funny spelling for egg - those who didn't see the news item ignore this )