This is your life

[Lectrician]

The CU's being released by MEM, Crabtree etc come in many varients, but the main line has a main switch with 3 or 4 non RCD Protected circuits, ideally suited for RCBO's for nuisance items like cookers etc. They can also be used for non RCD protected circuits (if any....hopefully the smokes).

There are then two individual 30mA banks of ways. Consencus is to ideally have two lighting circuits up and down each (4 total), and split these over the two RCD's. Similarly with the sockets. If you do fit only a single lighting circuit upstairs, you should make sure the sockets and lights upstairs are on different RCD's.




Also, with regards ring final circuits. The correction factor has changed, making it near impossible to use a 2.5mm ring if the cables are in an insulated wall or even loft. Looks like the end of the ring aint far away - it will be radials or non-standard circuits (4mm rings or even 20amp 2.5mm rings).

 

[Lectrician]

Also regarding the 17th (OP should rename this threads subject!)

Construction site special location section has had the table of different voltages allowable removed. Believe it or not, and like it or not, 230v with RCD Protection is now allowed on sites.




The rule of thumb correction for max EFL has been standardised to the NIC's 80%. It has been agreed this is a better mark to use when testing a new install prior to the heating being used by the owner etc.

The max EFL for C and D breakers have also changed considerably, which may make it difficult to comply with disconnection times occaisonally, and we are urged to use manufacturers data for the max EFL instead of the BS7671 figures in these cases.




Oh - and something I am happy about. CORGI have backed down and now do not force plumbers to look for boiler cross bonding. This makes or regs speak the same language as theirs.

 

[Lectrician]

Not quite......

Not as simple as saying "these sockets are for that".






.

That's how I read it though, Lec.I will have another look on Monday just to check, but I'm sure I interpreted it correct

The socket needs labeling, be of a different colour, have an inversed earth pin or the like.

The deffinitions of Skilled Person and Instructed Person should also be read and understood.

 

[ricicle]

The socket needs labeling, be of a different colour, have an inversed earth pin or the like.

Where does it say that, Lec?

 

[EdwardCurrent]

Those folk with a correctly installed TT system must be having a sly grin somewhere down the line.

And as for JD's RCBO factory , sky's the limit !!!

 

[Lectrician]

Those folk with a correctly installed TT system must be having a sly grin somewhere down the line.

Depends what you mean by 'correctly'. A 100mA RCD is not suitable for additional supplementary protection to cables buried in a wall at a depth of less than 50mm

 

[ban-all-sheds]

The deffinitions of Skilled Person and Instructed Person should also be read and understood.

We've had that "discussion" before....

 

[Lectrician]

Yea, and there needs to be some sort of consistency with the agreed 'laymans terms' of what they required.

I am going by the NIC's 'laymans' terms, which as a member, I of course should and will

 

[ricicle]

The socket needs labeling, be of a different colour, have an inversed earth pin or the like.

Where does it say that, Lec?

???

 

[securespark]

Ban

How are you going to attach a fly lead to the conduit?

 

[ban-all-sheds]

just bush it into the flush box and run a flylead to that.

 

[Lectrician]

The socket needs labeling, be of a different colour, have an inversed earth pin or the like.

Where does it say that, Lec?

???

 

[ricicle]

The socket needs labeling, be of a different colour, have an inversed earth pin or the like.

Where does it say that, Lec?

???

 

[Lectrician]

If you read the definitions for a 'skilled person' and an 'instructed person', you will be left with the conclusion that the only sure fire way to have a socket outlet not protected by an RCD will be to use reg 411.3.3 - exception (b).

"A suitably labelled or otherwise identified socket" or words to that effect.

 

[ricicle]

.You can still have sockets for specific equipment not on RCD if they are labelled for said equipment