SWA and adaptable box

[RyanCheetham]

Evening gents, hope everyone is having a good evening. Forgive me if this a stupid question but i would rather be safe than sorry.

At my fathers house he has asked me to provide power to his 2 seperate garages. Both will be ran in 6mm swa on 32a breakers. What i want to check is if it is ok to terminate both SWAs into one 4x4 adaptable box or should i be concerned about eddy currents? I think it would be ok but asking for help as i am starting the job tomorrow

 

[Outspoken]

Evening gents, hope everyone is having a good evening. Forgive me if this a stupid question but i would rather be safe than sorry.

At my fathers house he has asked me to provide power to his 2 seperate garages. Both will be ran in 6mm swa on 32a breakers. What i want to check is if it is ok to terminate both SWAs into one 4x4 adaptable box or should i be concerned about eddy currents? I think it would be ok but asking for help as i am starting the job tomorrow

Eddy when down the pub as it's Friday, not a problem if your quick

 

[Sintra]

Put them in one box it won't be a problem.

 

[telectrix]

use a plastic box. then no problem. currents don't flow in insulating materials. but you'll need to fit banjos or earth nuts.

 

[Octopus]

The only thing to be aware of, if you have connections within the box is can you ensure any later meddling will understand there are 2 circuits or are you simply using the Wiska to gland off the SWA?

 

[44ALLAN]

And it's separate not seperate

Go on google it.................your dying to do it.............make my day punk

 

[RyanCheetham]

I have bought a 100m drum of 3core swa ready and always fit banjos as standard. I prefer to use galv boxes as it just looks 'right' to me. Thanks for easing my mind guys, its always nice to see a helpful answer every now and then lol

 

[Brightspark2]

No concern. Only a concern in this instance when line and neutral are brought through seperate holes. What your doing is no different from the top of a DB with all the SWA terminated next to each other.

 

[RyanCheetham]

And it's separate not seperate

Go on google it.................your dying to do it.............make my day punk

Ok you win this round my friend

 

[RyanCheetham]

The only thing to be aware of, if you have connections within the box is can you ensure any later meddling will understand there are 2 circuits or are you simply using the Wiska to gland off the SWA?

No the adaptable box will be used as a pass through into the CU. I will label the box to make aware of 2 supplies

 

[44ALLAN]

Ok you win this round my friend

my spell check is now on 24/7

 

[Guitarist]

No concern. Only a concern in this instance when line and neutral are brought through seperate holes. What your doing is no different from the top of a DB with all the SWA terminated next to each other.

Or separate phases usually.

 

[guest119]

When glanding into a plastic box or isolator with an armour I always like to use a galv coupling.
Gland into the coupling and lock the banjo metal to metal. Using the brass bush just to hold it to the box/isolator.

 

[Engineer54]

Evening gents, hope everyone is having a good evening. Forgive me if this a stupid question but i would rather be safe than sorry.

At my fathers house he has asked me to provide power to his 2 seperate garages. Both will be ran in 6mm swa on 32a breakers. What i want to check is if it is ok to terminate both SWAs into one 4x4 adaptable box or should i be concerned about eddy currents? I think it would be ok but asking for help as i am starting the job tomorrow

Circulating/Eddy currents, are only a concern when using single core cables. So using 2 x 3 core cables will not have any affect on your installation. Just be sure that the tails of your two cables exit the galv' adaptable either through a single hole, into the CU/DB or two holes, each containing all 3 cores of the two separate cables...

 

[RyanCheetham]

Here is a picture of the finished box, in case i wasn't clear enough with my intentions. Apologies for the poor picture.

 

[Thefailsafe2012]

Really neat job Ryan! Good to see!

 

[RyanCheetham]

Really neat job Ryan! Good to see!

Thankyou, i would photo the board but i havent tidied it yet. Is all RCBOs so theres cables everywhere inside lol. Im rewiring his house in stages. Today was powering his two garages, a joyous day of about 95m of swa, ran under the floor. Was fun trying to cleat to the underside of the joists

 

[onions1066]

Thankyou, i would photo the board but i havent tidied it yet. Is all RCBOs so theres cables everywhere inside lol. Im rewiring his house in stages. Today was powering his two garages, a joyous day of about 95m of swa, ran under the floor. Was fun trying to cleat to the underside of the joists

Why did you cleat it to the underside of the joists?

 

[RyanCheetham]

Thankyou, i would photo the board but i havent tidied it yet. Is all RCBOs so theres cables everywhere inside lol. Im rewiring his house in stages. Today was powering his two garages, a joyous day of about 95m of swa, ran under the floor. Was fun trying to cleat to the underside of the joists

Why did you cleat it to the underside of the joists?

Because my dad is a perfectionist and would crucify me if i let the cable rest on the slab, he hoovers the cavity everytime i lift the floor, he also levels all the bearers and fits new boards after i am done (he is a builder)

 

[Knobhead]

Should introduce you’re dad to my sister. Compulsive Cleaning Disorder!

 

[telectrix]

nice neat job, ryan 10/10.

 

[RyanCheetham]

I wasn't sure if it would interest anyone but i took some 'in progress' shots of the work this thread relates to that we did this weekend. The trench is a 70m run and 1m deep. In the trench we have our 2 supplies to the garages and 2 conduits containing coax and cat5e (coax for cctv and cat5e because wifi struggles in the garden). The trench was dug out by hand by my dad and me on saturday then cabled and filled in today by us. Also started one of the garage installs today. Hope everyone else enjoyed there weekend, i am sunburnt to hell!

 

[marty88]

Brb, hoovering underneath my house.

 

[onions1066]

Looks ok but I would of gone for a stuffing gland to enter the socket .

 

[44ALLAN]

Looks ok but I would of gone for a stuffing gland to enter the socket .

Post 15..................would you have put a 'bond' between the 2 glands as well?
Just curious

 

[i=p/u]

1m deep hmmm.. You seemed chuffed good job..

 

[Engineer54]

Are you Sure those trenches are 1m deep?? They only look arond 30cm deep to me

 

[Knobhead]

One foot to me.

 

[Silly Sausage]

Looks like you've been digging trenches with a skinful!!! :smilielol5:

 

[shanky887614]

One foot to me.

which is around 30.6cm

51mm =2"

 

[RyanCheetham]

I am sure they are 1m deep. In the long shot of the trench you can see a T shaped yard stick we used to check our depth

 

[RyanCheetham]

Looks like you've been digging trenches with a skinful!!! :smilielol5:

Yeah i did get out of the trench and laugh at how wonky i was going

 

[Marvo]

I wasn't sure if it would interest anyone but i took some 'in progress' shots of the work this thread relates to that we did this weekend. The trench is a 70m run and 1m deep. In the trench we have our 2 supplies to the garages and 2 conduits containing coax and cat5e (coax for cctv and cat5e because wifi struggles in the garden). The trench was dug out by hand by my dad and me on saturday then cabled and filled in today by us. Also started one of the garage installs today. Hope everyone else enjoyed there weekend, i am sunburnt to hell!

Nice job with the adaptable box and the SWA glanding.

The trench does look a little shallow, we normally spec 600mm as minimum depth but the UK might be different. It would be a nice idea to put a layer of sand under the cables in the trench, maybe a bit overkill for a light traffic area but the ground looks a little rough.

 

[HandySparks]

In the trench we have our 2 supplies to the garages and 2 conduits containing coax and cat5e...

Too late for this job, but for anyone else doing this, I'd have put the co-ax and cat5 in some polythene cable duct rather than lengths of PVC conduit joined together. It would be more robust, easier to lay and give a smoother run for pulling the cables in. If you can't find the proper black cable duct, blue underground water pipe would do, providing you have the 'electrical cable' warning tape above.

 

[Guitarist]

Definitely should be surrounded by sand if not in ducting. At the very least, sift that soil

 

[Richard Burns]

Good job overall I think, I like the new method of cpc identification, I always thought the sleeving went over the cable not tied round it, but is does save all that tedious disconnection:tongue3:!
Digging trenches is no fun so well done on a 70m run.