Rewired bungalow, before i plaster have i missed anything?!

[bez101]

Hey up chaps,
I have rewired my bungalow over last couple of days and before the plastering is done i just want to check i havent missed anything that will prevent it from being signed off. (I am an industrial electrician so domestic is not my bread and butter, but what i have done is safe).

I have ran

*a ringmain for the kitchen,
*One for the rest of the house (only 2 bedroom).
*One lighting circuit throughout. (Smoke detectors and bathroom Fan off this)
*Another circuit for outside lighting,
*Cooker.
*Boiler.

I have a 6mm earth running from DB (linked to Gas coming in and electrics coming in) Going to the bathroom plumbing.

I have heard i need a 10mm Earth to go from my db to my cold water in...? is this so, if so can i take it up into the loft and connect onto the cold water in at the boiler (as it is inpractical to bring it to under the sink).

My chases are not capped with earthed metal capping so i understand i need RCD protection.. is that so? Will i have to purchase a 17th edition board.

I am unsure on what has to be Rcd protected, is it just my sockets and outside lighting? then put the rest on normal mcb? or could i run everything on Rcd's


Is there anything i have missed that will be picked up on inspection?.

Any advice would be greatly appreciated... thanks alot,

Phil...

 

[A-Non-eMouse]

smoke detectors have to be on there own circuit (and interlinked if more than one), or fed off a frequently used lighting circuit with isolation from it. you might as well just take a feed back to the mains for the smokes if the ceilings are still down etc.

talking of lighting circuits i think you have to have more than one anyway, so you dont lose all lighting in the event of a fault.

10mm earth has to be within 600mm of entry of service on the consumers side of stop cock.

you need a 17th edition board as it has two rcds and these should cover everything. all circuits need to be protected by rcd pretty much in domestic, ie except for chased cables deeper than 50mm or protected by earth metal conduit yadda yadda blah blah

 

[sparky paul]

10mm earth has to be within 600mm of entry of service on the consumers side of stop cock.

That would be ideal scenario but it doesnt have to be


He can still bond the water and gas outside of the 600mm ,but if he does this then he must install supplementary bonding to bathroom.

 

[Amp David]

Your smokes will be fine, as you've taken them off the lighting circuit.

Don't think its a requirement to have split lighting, but just good practice, just so you don't loose all lighting at once. (in the event of a fault)

If you've already installed you CU and its not fully RCD protected, then although expensive, you can use RCBOs to protect your circuits.

 

[bez101]

Thanks alot for the info guys,

I have not yet installed a CU as the original was fairly recent but i had come to terms with the fact RCD protection is required so i will buy a new unit.

I am unable to run a 10mm to within 600mm, more like 2500mm unfortunatly.
So i could bond to the water in pipe on the boiler? but then also have to bond everything in the bathroom? what does that include? things like the towel radiator and taps etc? oh dear....

 

[Sintra]

Fire detection circuits must be supplied independently of other circuits and not protected by an Rcd protecting multiple circuits. 560.7.1

The smoke alarms have to be interconnected, have a battery backup, and be permanently supplied from a separate way in the ccu, or supplied from a local lighting circuit that is regularly used. Please note this requirement conflicts with 560.7.1

Except for TT systems, the circuit supplying a smoke alarm should not be protected by an RCD. For TT systems the smoke alarm must be supplied from the fixed equipment section of the ccu, not through a 30mA RCD.

 

[andart]

all circuits in a bathroom must be rcd protected.
If they are rcd protedted and circuits comply with the regs for automatic disconection then you dont need supplementary bonding in the bathroom.

good luck,

andy

 

[Amp David]

Split load board then with RCBOs for your lighting and smokes. Surely this would be ok?

 

[bez101]

all circuits in a bathroom must be rcd protected.
If they are rcd protedted and circuits comply with the regs for automatic disconection then you dont need supplementary bonding in the bathroom.

good luck,

andy

Thanks alot Andy,

I am installing a dual RCD CU now, so everything will be RCD protected so aslong as i have a 10mm earth from my incommer to my cold water pipe on boiler (which is in the loft, nowhere near the bathroom) i should be safe?.

thanks again,

Phil...

 

[acat]

Dont forget you will need independant isolation from lighting circuit for fan and sensors ig you leave them connected to the lights.




Chris

 

[bez101]

Dont forget you will need independant isolation from lighting circuit for fan and sensors ig you leave them connected to the lights.




Chris

Would a standard light switch be classed as independant isolation for the fan? i do have one for the fan currently. How would i go about independantly isolating the smoke detectors and (although i understand its regulations) what would this be for?

thanks,

Phil...

 

[monkeyelectric]

Would a standard light switch be classed as independant isolation for the fan? i do have one for the fan currently. How would i go about independantly isolating the smoke detectors and (although i understand its regulations) what would this be for?

thanks,

Phil...

You'll need a triple pole isolater for the fan for maintenance purposes and a fused spur would be ok for the smokes, its so they can be tested without having to turn all the lights off and do it in the dark

 

[Amp David]

MK 10A 3 Pole Fan Isolator Sw - Screwfix.com, Where the Trade Buys


You will need a CU with a spare way not protected by an RCD for your light/smoke circuit.

Sintra has already given the relevent regs

 

[Spudnik]

Smoke detectors do not require their own dedicated circuit in a domestic installation.

It is perfectly acceptable to power them from a local regularly used lighting circuit.

As for their isolation, well, thats down to the individual.

Some argue that a separate isolator is required so that they can be maintained, whilst others (quite correctly) have said that they do not require one, as they can be slid off the base, or connections unplugged.

So, with that in mind, there is nothing in a smoke detector that is user/installer maintainable, apart from replacing the battery, so the only time one would remove one is to replace it.

Have a read here:

http://www.electriciansforums.net/e...257-smoke-detectors-own-circuit-lighting.html

 

[A-Non-eMouse]

if your keeping your smokes coming off the lights and your only having one light circuit you will have to cover them with an rcd, unless your not having lights in the bathroom that is