2 core cable..

[Crosswire]

412.2.3.2

412.2.3.2 Except where Regulation 412.1.3 applies, a circuit supplying one or more items of Class II equipment shall have a circuit protective conductor run to and terminated at each point in wiring and at each accessory.

 

[MDJ]

okay I'm going to the van huh

 

[Octopus]

412.2.3.2 Except where regulation 412.1.3 applies, a circuit suppling one or more items of Class II equipment shall have a circuit protective conductor run to and terminated at each point in wiring and at each accessory

Still think its good practice to always have a CPC available.

 

[MDJ]

Just flicking through now fella, looks like your right unless I spot a small reg hiding under another somewhere haha, my feet are cold now as well lol, I ran out to the van with no socks on

 

[Crosswire]

Just flicking through now fella, looks like your right unless I spot a small reg hiding under another somewhere haha, my feet are cold now as well lol, I ran out to the van with no socks on

That's dedication dude!

 

[Octopus]

Yet another daft example of the regs.

Why don't they simply say that all circuits from a distribution board must have a continuous CPC run to each and every accessory??

 

[Crosswire]

So in summary it seems that

"412.2.3.2 Except where Regulation 412.1.3 applies, a circuit supplying one or more items of Class II equipment shall have a circuit protective conductor run to and terminated at each point in wiring and at each accessory."

supercedes "411.3.1.1"

and thus the tester was correct on this occasion?

 

[MDJ]

yep dedication, basically it is about time a decent chat was on here by sparks discussing a reg or 2, after having a good look through, I think murdoch is right, reg 412.2.3.2 looks like the reg which suggests it is required, still looking for the hidden one though.

 

[Geoffsd]

412.2.3.2 Except where Regulation 412.1.3 applies, a circuit supplying one or more items of Class II equipment shall have a circuit protective conductor run to and terminated at each point in wiring and at each accessory.

That's it - with the note that it is intended to take account of the possible replacement by the user of class II equipment by class I equipment.

The proviso of 412.1.3 relates to whole installations of class II under supervision so that no changes will be made - plus a bit more.


Edit - I type too slow.

 

[Deleted member 26818]

If you for instance were to run a cable with no joins, directly from a CU to to a double insulated item of equipment, how many points in the wiring requiring a CPC to be connected would there be?
If no accessories are used in the circuit (remembering that an item of current using equipment is not considered to be an accessory) where would you connect a CPC?

 

[Crosswire]

If you for instance were to run a cable with no joins, directly from a CU to to a double insulated item of equipment, how many points in the wiring requiring a CPC to be connected would there be?
If no accessories are used in the circuit (remembering that an item of current using equipment is not considered to be an accessory) where would you connect a CPC?

Can't think of anywhere that I could connect the cpc to, other than a wago or the terminal of the back box ( if applicable). In the fan itself I would sleeve the cpc and terminate it in a floating wago, or crimp, or screw type terminal block.

Of course it is impossible to earth a piece of plastic, but if the Regs say I must run a cpc to it, then I must comply, whether it makes sense or not......

 

[Les Macaulay]

spinlondon is talking sense. To avoid bad job relations with the tester, change the cable to 3core but make sure you insulate the end of the cpc after sleeving it, or better still over-sleeve it. You are perfectly correct installing the 2core, but the tester is trying to be pedantic and perhaps over-zealous. Refer to your supervisor discretely if that's possible. The label is a good idea, i.e. class ii equipment - no cpc required. There will be no where to connect a cpc any how except in the termination box of the local maintenance switch.
Cheers
Les

 

[Deleted member 26818]

Regulation 412.2.4 wouldn't allow the termination of the CPC within the fan into a wago, crimp or terminal block, unless specifically provided by the manufacturer of the fan.

 

[Engineer54]

If you take this BS7871 regulation literary, that a CPC should always be taken to any class11 accessory, Then you have to ask ''Why'' do all the manufacturers of class11 equipment that supply a factory fitted lead/cable only ever provide that lead/cable with a 2 cores?? lol!!

 

[kingeri]

Using 3 core for class II items such as downlights and fans is a bad idea in my view, it's why we so often see CPCs just cut off and not terminated - cos there's nowhere to terminate it to.