RCD Protection on 16mm Submain??

[Guitarist]

It would have been ok because the builder told me that the ceiling was going to be dropped about 60mm give or take, but on returning a couple weeks ago he decided to dropped it about 30 without letting me know an now its been boarded and plastered! Where does this leave me know guys, bit worried about this one.

Cheer

Paul

Walk away.

 

[Paul Chick]

Im going to just have to put a 30mA RCD at the origin now regardless of reg 314 and just make a note. Really naffed off with this.

 

[Guitarist]

I feel for you mate. Are you obliged to do anything?

 

[Ponty Massive]

Could you not put a Type S RCD at the source, then have your dual RCD's in the board?

 

[Deleted member 26818]

Im going to just have to put a 30mA RCD at the origin now regardless of reg 314 and just make a note. Really naffed off with this.

To reiterate:
The use of an 30mA RCD is not an acceptable method of providing additional protection for cables above ceilings or under floors.
Unless you also provide an acceptable method, you will fail to comply with both 314.1 and 522.6.100.

 

[Paul Chick]

That 522.6.100 reg is absolutely stupid. When they brought in this 30mA protection for cables not buried at a depth of more than 50mm they should have got rid of that one. How is that even right!? What would happen if the house blew over on its side and ceiling now became a wall? An RCD is probably the best method.

 

[Paul Chick]

Yeah, Im up **** creek Guitarist

 

[Guitarist]

To reiterate: Walk away (laugh and shake your head at the same time for maximum effect)

Mate, if you are really tied to this job then stand your ground and get them to remove the ceiling. They have shown you no professional courtesy.

 

[Paul Chick]

Id love too if it wasnt my mother-in-laws house :censored:

 

[trev]

Id love too if it wasnt my mother-in-laws house :censored:

In that case stand your ground mate, think of the MIL brownie points when you insist on the correct job being done

 

[Knobhead]

Set the mother in law on them. they'll back down if they know what's good for them!

 

[Des 56]

I would have thought,the inclusion of the mother in law in the equation changes everything
All sorts of re evaluations should now be done :love:

 

[brucelee]

yep that will do it give her a large hammer and point her at the ceiling and then the guy that did it

 

[brucelee]

So
If for example you was to install a lighting circuit for 1 light under stairs
from ccu it was in trunking
then entered the palsterboard underneath the staircase and back out on opposite wall back in trunking to the switch then onto say a batten lampholder
would this then not reqiure additional protection by means of RCD
or at the point were it entered the ceiling and came out the other side should have mechanical protection provided BY
either
metal conduit or use of SWA cable

Or jsut install
a RCD to protect the only light
or in trunking on the surface
On my mother in laws job last year for elecsa assessment
i went to point of making sure all me holes were within 0.25 and 0.4 the span of the joist 50mm from top or bottom
holes drilled 3 diameters apart
and the plumber comes along and bangs either large notches out everywhere or runs his pipes on top of your cables trapping some with heating pipes GAS pipes
and springy plastic piping looking like a large white wriggling worms all over the shop

 

[sedgy34]

The rcd is for the walls not ceilings so cable in wall less than 50mm requires rcd
cable in ceiling lying on ceiling doesn't require rcd
as you knew already