Assistance with my installation

[Pretty Mouth]

Thank you, I’ve only got the brown book but looked up the tables. Basically the cable is de-rated to 46A so it operates at 70 instead of 90 degrees?

Yes, you got it

 

[mainline]

I don't believe this to be true @Dartlec, I believe this is a (rather persistent) myth .

I have it in writing from 3 DNOs (every one that I have contacted so far) that they have no special requirements regarding earthing arrangements at outbuildings.

We do have to remember though that bs7671 forbids the use of pme earthing for some types of installations.

 

[Poacher3536]

Thank you everyone for your input, it’s much appreciated. I will respond later on with a proposal to remedy the situation based on your feedback and my research on points you’ve made (I’d rather learn from this by getting the books out too)

 

[Pretty Mouth]

We do have to remember though that bs7671 forbids the use of pme earthing for some types of installations.

Your point is...?

 

[mainline]

Your point is...?

You said, "I have it in writing from 3 DNOs (every one that I have contacted so far) that they have no special requirements regarding earthing arrangements at outbuildings."



Because a diyer/trainee reading that statement may well believe that they can export pme to any outbuilding without any special requirements, which isn't true.

 

[buzzlightyear]

I have it in writing from 3 DNOs (every one that I have contacted so far) that they have no special requirements regarding earthing arrangements at outbuildings

how many faults per year on pme lost neutral very little the power lines are monitored ,you have got more chances of being kissed on the lips of a giraffe .

 

[mainline]

how many faults per year on pme lost neutral very little the power lines are monitored ,you have got more chances of being kissed on the lips of a giraffe .

One death would be one too many.

 

[buzzlightyear]

One death would be one too many

its like throw a frying pan in the air in a crowd which unlucky one get it first .

 

[davesparks]

We do have to remember though that bs7671 forbids the use of pme earthing for some types of installations.

Yes it is prohibited for certain installations, but not garden sheds.

 

[mainline]

Yes it is prohibited for certain installations, but not garden sheds.

That would depend on what the shed is made of.