Terminating armoured in meter box

[Jccc11]

Evening all. I have to supply a garage conversion with a 16mm armoured running 40 meters away from the main house. I was thinking about coming off the Henley blocks (in the meter cupboard) into a TIME DELAYED RCD board, with a 63 amp Mcb, then glanding the 16mm armoured into the board. I was thinking About putting a separate meter box next to the existing as I know sweb get funny about it all Is this the Best way to go about it ?

 

[Strima]

Why an RCD for SWA? I was under the impression that the bottom right corner was allocated for consumers equipment such as isolators.

 

[Jccc11]

Why an RCD for SWA? I was under the impression that the bottom right corner was allocated for consumers equipment such as isolators.

So how would you do it ?

 

[Dave OCD]

If the existing supply has a TT earthing arrangement then you'd certainly need an S type 100ma RCD for additional protection to the SWA submain due to the likely high impedance and relatively low earth fault current. But with a TNCS or TNS supply the additional RCD would be unnecessary.

 

[James]

So how would you do it ?

metal fused isolator, terminate armoured into it, then out of there with double insulated tails into henley blocks

 

[7029 dave]

I like your idea of separate external box for equipment etc, thoughtful.

 

[Rockingit]

If all you need is a means to make off an armoured without the faff of a box, present the gland into a female conduit bush, sleeve the conductors with decent heatshrink, fill the bush with resin and use the banjo to fix it to the wall. Tony taught me that one.

 

[Strima]

So how would you do it ?

What's the earthing arrangement?

Intended use of the garage and maximum demand?

Any services that require bonding back to the MET?

 

[LewisM]

I have seen it done like this in the past however it needs to be terminated into an enclosure.

 

[ipf]

I have seen it done like this in the past however it needs to be terminated into an enclosure.

View attachment 61260

Hope you didn't find it quite like that.....

 

[DefyG]

Hope you didn't find it quite like that.....

Agreed, no OCD for the armoured cable, not glanded into enclosure, conductor ID, exposed singularly insulated conductors, SPD's??? etc etc........

 

[ipf]

Agreed, no OCD for the armoured cable, not glanded into enclosure, conductor ID, exposed singularly insulated conductors, SPD's??? etc etc........

It goes without saying....... but I'm on about everything being open and unsealed.

It indicates that the isolator has actually been installed, with the outgoing swa having originally been directly from the meter???

 

[DefyG]

It goes without saying....... but I'm on about everything being open and unsealed.

Assumed that was because it was WIP!

 

[littlespark]

Isn’t the meter cabinet an enclosure? You need a key or a tool to open it.

(yeah, I wouldn’t do it like that either, but just asking the question.)

 

[Dave OCD]

I'd say not because everyone has a meter box key and householders need to read the meter now and then. And it's basic insulation unenclosed so non-compliant really.