Toilet light switch canundrum

[anwah]

Client fed up with pull switch wants plate switch fitted on outside of wall.16th edition board Crabtree SB6000,

light circuit protected by a 6amp type 1 breaker, cable extended from original posistion under floor boards

down a 4" stud wall to new switch position who would fit an rcd and why?

 

[betty swollocks]

I'm assuming you are looking for a reason other than the regulation which states all cables buried in a wall at a depth of less than 50mm should be protected by an rcd or metallic conduit

Problem with stud walls is how do you confirm the distance from the outside edge of wall to the unsighted cable

And what about the bit that enters the switch box?

Is the problem cost?

Is it laziness?

Is it a college question?

Why am I talking to myself.......

 

[ProDave]

Length of steel conduit down inside the wall cavity.

No need for an RCD.

 

[kme]

What`s the earthing system?

 

[SPECIAL LOCATION]

If you are worried just stick one of these by the CU...

Volex 13A RCD FCU | Screwfix.com

Why do people keep using the phrase 16th edition board or 17th edition board???

It means nothing..

and give no description about the composition or layout of the CU...

An old 4-way wylex can be 17th edition compliant...

 

[ProDave]

Why do people keep using the phrase 16th edition board or 17th edition board???

It means nothing in reality.

But in practice, a 16th edition boar is split load with some circuits on an RCD and some not. A 17th edition board is (usually) split load with both sides on an RCD.

But you knew that didn't you.

While not strictly correct, it is an easy way to describe common CU types in common use.

No worse to say that than to "hoover" the house with a Dyson vacuum cleaner.

 

[Apache]

I'd have thought you could swap the MCB for an RCBO cheaper and easier then putting steel conduit in the wall.

 

[NozSpark]

Length of steel conduit down inside the wall cavity.No need for an RCD.

Or a just use some BS8436 cable

 

[flyingsparky]

Is it even worth the time to ask the question? Steel conduit will still need to be earthed. Just put in an RCBO or separate RCD and enclosure. Or RCD spur and be done with it.

By the time you have fought the system you could have just complied and done three more jobs.

 

[steptoe]

Is it even worth the time to ask the question? Steel conduit will still need to be earthed. Just put in an RCBO or separate RCD and enclosure. Or RCD spur and be done with it.By the time you have fought the system you could have just complied and done three more jobs.

why?

 

[shed69]

Or a just use some BS8436 cable

Best solution in my opinion Noz.....

---------- Post Auto-Merged at 18:03 ---------- Previous post was made at 18:02 ----------

Send him a couple of feet!!!!

Not the ones with your slippers on them.....

 

[NozSpark]

I bought 10m from Batt cables,,, TBH for what it cost I should have bought 100m as there wasn't much in it by the time I paid a small order handling charge P&P and VAT

But then again I didn't really want 90m of it sitting in my garage just waiting to be used

 

[PC Electrics]

IIRC the Crabtree SB6000 board was only available as a mainswitch board or a RCD mainswitch board, so by convention it isn't even a 16th board.

I'm guessing the OP has the mainswitch version.

But I agree, why do people use these meaningless descriptions.

Just fit an FCU or a RCD in its own little enclosure (my prefered method).

---------- Post Auto-Merged at 20:26 ---------- Previous post was made at 19:58 ----------

I'd have thought you could swap the MCB for an RCBO cheaper and easier then putting steel conduit in the wall.

think you'll find there are no RCBOs that will fit in place of an SB6000

---------- Post Auto-Merged at 20:27 ---------- Previous post was made at 20:26 ----------

That was an RCD FCU of course

 

[streetlighter]

I'm sure I've seen a picture of a split load SB6000 board on the net somewhere

 

[SLIPSHOD & SLAPDASH]

If you are worried just stick one of these by the CU...Volex 13A RCD FCU | Screwfix.com

Connecting it to the relevant circuit may help the situation

 

[davetheglitz]

Hadn't seen BS8436 cable before - looks a great idea - but does it actually comply to the BS7671 regs?

The aluminium tube offers virtually no resistance to penetration - though it should trip the mcb if live is nicked at the same time.

 

[OnOff]

How about a nice occupancy switch in the ceiling? Thinking about it do they need a neutral?

 

[NozSpark]

Hadn't seen BS8436 cable before - looks a great idea - but does it actually comply to the BS7671 regs? The aluminium tube offers virtually no resistance to penetration - though it should trip the mcb if live is nicked at the same time.

Dave, your right the aluminium tube doesn't offer any mechanical protection, but then again SWA doesn't either.. All it offers is a direct path to earth for any "penetration" faults

How about a nice occupancy switch in the ceiling? Thinking about it do they need a neutral?

Yes, a neutal would be required

 

[sb_89]

You can get occupancy sensors that don't require a neutral onoff .

 

[OnOff]

You can get occupancy sensors that don't require a neutral onoff .

Do you have a make / link? Only ones I've come across were from TLC and they needed a neutral. Cheers.