Dual board with no earth on final circuits

[Sparksaflyin]

Hi guys. Need to change the fuseboard at my parents house but none of their final circuits have a cpc run to them. Obviously have an earth on the main incoming so I can get a 16mm earthing conductor up to my new 18th edition metallic consumer unit but they don’t want a rewire so none of the final circuits will be protected with an earth.

My question is will this be an issue in the functionality of the rcds? Obviously the rcd functions on an imbalance between live and neutral so as far as I’m concerned it shouldn’t be too much of an issue hopefully, just wanted to get some of your opinions on the matter.

Another issue I can see is how I’m supposed to test for disconnection times without an
earth?

Opinions would be greatly appreciated

Thanks

 

[Sparksaflyin]

you go to work on an ---? i thought even essex had horses these days.

We do mate. Ship them all from up north.

 

[telectrix]

We do mate. Ship them all from up north.

silly arse. them's not horses, they's northern women

 

[Markyd]

Lovely stuff! So as long as I make a note of it on the doc and the **** pile of other stuff I’m sure to find, my --- is covered?

What a great attitude to have.......im done ..im out

 

[Sparksaflyin]

No wonder you call yourself sparksaflyin.........change the metal lighting fittings back to plastic until you replace the CU....Then leave them on

They’ll all be plastic by the time I’m done. He won’t be so stubborn once he knows my names tied to it. ( hopefully )

 

[davesparks]

, the rcd will still protect against this? Only problem being I can’t really test the theory out without an earth?

No, in this situation an RCD disconnects the circuit once a person is already receiving an electric shock. A 30mA RCD disconnects the supply before the shock reaches a level that is not normally fatal for a healthy adult.

 

[Sparksaflyin]

What a great attitude to have.......im done ..im out

I was referring to the lack of an earth on the lighting. If it’s not there and they won’t let me change it, what exactly can I do? Thanks for the input though

 

[Sparksaflyin]

silly arse. them's not horses, they's northern women

Haha they do like to ride mate! Not usually involving a saddle though

 

[westward10]

Without a cpc ADS cannot be complied with and the provision of an rcd cannot be relied upon in the absence of a cpc.

 

[Sparksaflyin]

No, in this situation an RCD disconnects the circuit once a person is already receiving an electric shock. A 30mA RCD disconnects the supply before the shock reaches a level that is not normally fatal for a healthy adult.

Maybe the 30ma will knock some sense into him. All jokes aside the metal faceplates definitely need to go

 

[davesparks]

I was referring to the lack of an earth on the lighting. If it’s not there and they won’t let me change it, what exactly can I do? Thanks for the input though

What you can do is walk away from the job and have nothing to do with it.

 

[Sparksaflyin]

Without a cpc ADS cannot be complied with and the provision of an rcd cannot be relied upon in the absence of a cpc.

I agree mate. Thanks for input. Board change will take place then and replace the lot with plastic regardless.

 

[Dustydazzler]

If they don’t feel the need for any earth on the circuits why do they feel the need for a new fuse board

Might as well just leave everything alone and as it were...

 

[Sparksaflyin]

What you can do is walk away from the job and have nothing to do with it.

Seriously? They are my parents

 

[telectrix]

What you can do is walk away from the job and have nothing to do with it.

defeatist.

 

[telectrix]

nursey just called, it's past my bedtime... boing, sed zebedee

 

[Markyd]

Lighting Circuits Without A CPC: How To Deal With Them

Elecsa offer their technical support regarding CPC and what to do if a lighting circuit does not have this. Lighting circuits installed before 1966 did not require a circuit protective conductor (cpc)

professional-electrician.com

 

[Sparksaflyin]

If they don’t feel the need for any earth on the circuits why do they feel the need for a new fuse board

Might as well just leave everything alone and as it were...

That’s most definitely the sensible thing to do but I’m assuming it’s because A) the current board looks terrible and the fuseboard cover is not in the best condition and B) that in the very rare occasion the fuse blows , my dad has to replace the wire and he can’t be assed with it

 

[Sparksaflyin]

A note on a cert cannot excuse you from the responsibility of not doing your job properly or leaving an unsafe condition.

I wouldn’t leave an unsafe condition but I can’t start chasing walls out to rewire if they don’t want me too

 

[ruston]

Anyone got any ideas on why there would be 3 phase going into a 3 bed house?

Is it a terraced house ?

 

[Dustydazzler]

I wouldn’t leave an unsafe condition but I can’t start chasing walls out to rewire if they don’t want me too

Why not?

Wait till they go on holidays and then chase all the new cables in. By the time they return it will be ready for redecorating