no earth external plastic

[Wilson12]

I know it's bad practice but.i opened up a plastic light fitting 2 stories up on the external wall and there's no earth just line and neutral.i feel it's okay but is there many reasons this is bad

 

[telectrix]

if it's a class II fitting, it does noe need a cpc. however, the cable should have a cpc, even if it's not connected to the fitting.

 

[Des 56]

Read chapter 41 of the bible and specifically 410.3.3 and it will give information that will best explain and help your understanding

 

[Pete999]

I know it's bad practice but.i opened up a plastic light fitting 2 stories up on the external wall and there's no earth just line and neutral.i feel it's okay but is there many reasons this is bad

What would be the consequences of someone swapping for metallic one?

 

[Risteard]

if it's a class II fitting, it does noe need a cpc. however, the cable should have a cpc, even if it's not connected to the fitting.

I don't quite agree. The cable doesn't need a cpc. Every point in the wiring, however, needs a cpc.

 

[Pete999]

I don't quite agree. The cable doesn't need a cpc. Every point in the wiring, however, needs a cpc.

In an ideal world yes, unfortunately in some cases lighting was wired with twin no cpc.

 

[telectrix]

I don't quite agree. The cable doesn't need a cpc. Every point in the wiring, however, needs a cpc.

is that not the same thing? unless a separate cpc is added.

 

[Wilko]

I don't quite agree. The cable doesn't need a cpc. Every point in the wiring, however, needs a cpc.

Agreed, but check out 543.6.1 which I think says it should be nearby.

 

[Pete999]

Agreed, but check out 543.6.1 which I think says it should be nearby.

What does nearby mean? next door, in the CU down stairs, come on guys get real don't take it literally, it's real life not fantasy land, nearby, for crikey s sake.

 

[telectrix]

like I'm nearby to the Mersey, but not actually in it. I'd get my feet wet just walking on it.

 

[Pete999]

like I'm nearby to the Mersey, but not actually in it. I'd get my feet wet just walking on it.

I could walk on it, if I really concentrated, cus I am a God.

 

[telectrix]

pete, you been changing wine into water again?

 

[Wilko]

What does nearby mean? next door, in the CU down stairs, come on guys get real don't take it literally, it's real life not fantasy land, nearby, for crikey s sake.

Sorry to have offended you by use of the word nearby.

 

[davesparks]

I know it's bad practice but.i opened up a plastic light fitting 2 stories up on the external wall and there's no earth just line and neutral.i feel it's okay but is there many reasons this is bad

Can you give us a bit more information on this so we can get a better idea of the installation method as that will have a bearing on the answer.

What sort of installation is this, domestic, commercial....?
If this is just a short flex tail to connect the light fitting to the existing wiring then I see nothing wrong with it, however if the fixed wiring up to this point doesn't include a CPC then it is a problem (unless double insulation is being used as the protective measure, but this is rare and has its own requirements in 7671)
If it is a steel conduit installation then you might have the conduit being used as the CPC so it may well be present without you realising it.

 

[Risteard]

is that not the same thing? unless a separate cpc is added.

Indeed, but the point is that a separate cpc can be drawn instead of using one incorporated within the cable. (Indeed singles wouldn't be usable otherwise.)