Garage Supply Change

[skmanuk]

Hi Guys

I have a slightly unusual one here and would appreciate any advice/comments,

I have a detached house and detached garage, room over garage, both with their own supplies and meters. I belive the original purchaser at new build was going to run a business from over the garage and wanted a seperate supply. This of course means 2 lots of standing charge and high price initial units.

Client wants to link the garage to the house supply.

Both meter boxes currently have a 100A Isolator after the Meter and then tails to the CU's.

The plan is to run a 25mm 3 Core SWA from the house meter box to the garage meter box. In the house meter box I was going to split the supply after the 100A Iso using Henly blocks, and tie in the SWA earth.

At the garage end fit a new 100A Isolator, remove the CU Tails from the existing !00A Isolator and route the incoming SWA thro the new Isolator to the existing CU. Again tieing in the SWA earth to the existing earth.

A couple of further questions, should the SWA cable cores in the boxes be sleeved to blue and yellow/green?

How would you terminate the SWA into the bottom of the Meter box, simple remove the wire armour and innr protection and route up through the bottom enrty opening?

Thanks in advance.

 

[telectrix]

A couple of further questions, should the SWA cable cores in the boxes be sleeved to blue and yellow/green?

How would you terminate the SWA into the bottom of the Meter box, simple remove the wire armour and innr protection and route up through the bottom enrty opening?​

SWA cores must be sleeved to identify what they are.

terminate the SWA into an adaptable box with correct SWA gland. . use fly lead from banjo if required . SWA cores can be left long to terminate as you want.​

 

[Knobhead]

One thing you need to do is talk to the DNO. Your client may want two 100A supplies, the DNO may have different ideas. If it entails running a new supply cable it may be easier to carry it on past the house to the garage and a 2[SUP]nd[/SUP] meter position.

If you go the SWA rout the isolator at the house must be fused.
Please ensure the SWA is glanded and earthed properly.

 

[olliep]

Yes, do the thing.

 

[Knobhead]

Yes, do the thing.

What are you talking about?

I think you may be better as a van critique which is what most of your posts are about.

 

[olliep]

It was my m8!

 

[skmanuk]

One thing you need to do is talk to the DNO. Your client may want two 100A supplies, the DNO may have different ideas. If it entails running a new supply cable it may be easier to carry it on past the house to the garage and a 2[SUP]nd[/SUP] meter position.

If you go the SWA rout the isolator at the house must be fused.
Please ensure the SWA is glanded and earthed properly.

Hi Tony

Thanks for the reply.

He already has two seperate 100A metered supplies. This is what he wanst to get rid off by supplying both house and garage from the same supply.

 

[AndyL]

One thing you need to do is talk to the DNO. Your client may want two 100A supplies, the DNO may have different ideas. If it entails running a new supply cable it may be easier to carry it on past the house to the garage and a 2[SUP]nd[/SUP] meter position.

If you go the SWA rout the isolator at the house must be fused.
Please ensure the SWA is glanded and earthed properly.

I think from OP he already has 2 supplies, wants to ditch one and then re-feed garage from house

 

[AndyL]

The plan is to run a 25mm 3 Core SWA from the house meter box to the garage meter box. In the house meter box I was going to split the supply after the 100A Iso using Henly blocks, and tie in the SWA earth.

At the garage end fit a new 100A Isolator, remove the CU Tails from the existing !00A Isolator and route the incoming SWA thro the new Isolator to the existing CU.

Seems like a big supply for a garage, what will it be used for?

 

[Knobhead]

Hi Tony

Thanks for the reply.

He already has two seperate 100A metered supplies. This is what he wanst to get rid off by supplying both house and garage from the same supply.

OK. but what has been said about glanding the SWA and a fused isolator still stands.

 

[topquark]

What is the max demand both for the house end and garage end, also approx distance between house and garage..

 

[Knobhead]

It was my m8!

All we need two children playing.

 

[olliep]

all we need two children playing.

children!

 

[skmanuk]

What is the max demand both for the house end and garage end, also approx distance between house and garage..

What is the max demand both for the house end and garage end, also approx distance between house and garage..

Now we're opening a can of worms...

Depends what diversity is applied tempered by common sense!

House
1 off Cooker 32A
3 off Ring 32A
4 off Lights 6A
1 off Alarm 6A
1 off Water Heater 16A

Garage
2 off Ring 32A
2 off Light 6A

Cable run between House and Garage = 16M

 

[AndyL]

Garage
2 off Ring 32A
2 off Light 6A

Cable run between House and Garage = 16M

Like I said before 100A seems big if you just got a few sockets and lights in the garage

 

[topquark]

Now we're opening a can of worms...

Depends what diversity is applied tempered by common sense!

House
1 off Cooker 32A
3 off Ring 32A
4 off Lights 6A
1 off Alarm 6A
1 off Water Heater 16A

Garage
2 off Ring 32A
2 off Light 6A

Cable run between House and Garage = 16M

OK, so not likely to take out the one service fuse when combining the load(assuming it IS 100A ... needs checking). The 25mm SWA seems a bit overkill.

 

[HandySparks]

I don't see a problem with your plan, except that I'd try and keep any new cables or equipment out of the meter boxes. They're usually reserved for the DNO and metering company's equipment.

 

[skmanuk]

The plan is to run a 25mm 3 Core SWA from the house meter box to the garage meter box. In the house meter box I was going to split the supply after the 100A Iso using Henly blocks, and tie in the SWA earth.

At the garage end fit a new 100A Isolator, remove the CU Tails from the existing !00A Isolator and route the incoming SWA thro the new Isolator to the existing CU.

Seems like a big supply for a garage, what will it be used for?

Apologies, the SWA will be 16mm, not 25mm

 

[Guitarist]

The DNO will still need consulting over this as you will want them to officially "disconnect" their supply to avoid the extra standing charges you presently have.

 

[skmanuk]

Final question, what are the implications regarding the fitting of the 100 breaker and Henly blocks in the meter box on the house that is being retained in respect of the DNO.

I 'm assuming that the garage end is not a problem because I will ask the DNO to cease the supply to that box.