SWA to garage on PME supply and advice needed on earthing

[timmy123]

I am looking from some advice regarding installing an SWA cable from a house to a stand alone garage some 20 metres from the house. The incoming supply to the house is PME. I understand that I will need to put in a seperate earth electrode for the garage installation. I am installing a seperate CCU in the garage.
My question is regarding the earthing in respect of the SWA.

Do I connect the SWA earthed sheath to the MET in the house CCU or do I connect the earthed SWA sheath to the garage CCU MET which will have an earth via an earthing rod buried outside the garage?
I would appreciate any advice on this as reading the regs etc has not helped me find the answer.
Many thanks​

 

[Graeme Harrold]

If you are going to spike the garage, then earth the SWA at the supply CU as this will provide "disconnection protection" for the cable.

 

[fulla]

I am looking from some advice regarding installing an SWA cable from a house to a stand alone garage some 20 metres from the house. The incoming supply to the house is PME. I understand that I will need to put in a seperate earth electrode for the garage installation. I am installing a seperate CCU in the garage.
My question is regarding the earthing in respect of the SWA.

Do I connect the SWA earthed sheath to the MET in the house CCU or do I connect the earthed SWA sheath to the garage CCU MET which will have an earth via an earthing rod buried outside the garage?
I would appreciate any advice on this as reading the regs etc has not helped me find the answer.

Many thanks​

yes connect swa armouring at the supply end if you are going to use a rod at the garage end then armouring should not be connected to c/u in garage dont forget treat the garage as a tt system and use a front end 30ma RCD

 

[Spudnik]

You dont really need to divorce the PME earth in the garage from the house, providing there are no services entering the building.

 

[Guest123]

You dont really need to divorce the PME earth in the garage from the house, providing there are no services entering the building.

Noooo....please not again....

 

[Spudnik]

Noooo....please not again....

Chicken

 

[Hawk81]

You dont really need to divorce the PME earth in the garage from the house, providing there are no services entering the building.

i agree totally. Far too many are to quick to tt an outbuilding when they dont have to.

 

[Graeme Harrold]

Noooo....please not again....

I was keeping my head low too!!!

 

[timmy123]

Graeme,
Thanks for your comments on my question. All the best.
Tim

 

[timmy123]

Fulla,
Thanks for your comments on my question. Cheers. Tim

 

[timmy123]

Many thanks for your help with my query. Cheers. Tim

 

[Andyrc]

Hello all, poss my first thread on HERE, I was going to ask a Similar Question , even after 20yrs in the "trade"( LOL now a days!)
With PME, as the Neutral is Earthed, and that Neutral/Earth Conductor breaks / gets damaged somewhere along the line! then you have no reliable or means of Earthing! ................BUT WHY EARTH THE SWA (example) to the TT System in the Garage/shed etc etc,

and NOT keep them separated? I've always known it to be good pratice, EARTH the Supply cable, BUT DIVORCE at the Shed/ TT side