1. Vortigern

    SWA supply cables between buildings will not disconnect in required time

    Doing calcs on swa supply to building as sub main from main three phase squard D board for single phase supply off of TN-S supply. I used cable mate from jarsoft and looked up various tables for disconnection times. In all case scenarios it tells me it will not disconnect within the required...
  2. G

    Incorrect SWA glanding/bonding

    Hi all, I've just moved into a rented property and found the attached photo outside the conservatory. It spurs from an inside socket and goes down the garden to an outhouse. I've tried using the 18th edition to find some evidence that this is obviously the incorrect method, as I'd like to go...
  3. GBDamo

    2.5mm or 4mm SWA armour bonding

    Armour not CPC. By the letter of the regs 2.5mm is acceptable as the DB offers both mehanical and corrosion protection. Just seems a bit puny on a 10mm SWA, what about a much larger cable? Can some of the boffins explain why 2.5mm is deemed acceptable. Cheers
  4. T

    3 phase swa sub

    Just a quick one does a three phase 25mm sub main in swa 4 meters long have to be fused even thou it comes from a bs1361 100amp services fuse then from a standard three phase isolation switch fitted from electricity company? Being swa and 25mm in size would this be acceptable?
  5. L

    SWA questions, doubting electrician

    Recently had an electrician in to wire up power to a detached garage and also wire in a 32 amp rotary switch for an eventual hot tub install. He has used a spare 40amp MCB in the house consumer for the garage and a 32amp one for the hot tub point. Cable run for both is about 10m each. He left...
  6. I

    New SWA to flats from head

    Hi Guys, First time posting but I've been commissioned with essentially running new cables from the head to 5 flats, due to the ground floor flat not allowing us to run the cables through their flat to the next one we will have to come out of the basement and upto the roof and then down the...
  7. D

    SWA sheath, earthing and empty consumer unit space

    Hi all I had some house rewiring undertaken on my house and have come across a few issues since painting. First thing was damage to the rubber outer sheath of the SWA cable on the outer wall which I've rapped electrical tape around temporarily as the metal rods were visible and we had a lot of...
  8. A

    Meter tails issue

    Hi guys I'm installing a CU in a new build and have a couple of questions I need some guidance with regards to the meter tails. I need to drill a hole through the wall (for the meter tails) to access the main supplies which are located in the recessed box on the outside of the property. I am...
  9. K

    UK RCD keep tripping.

    Hi All.. I have a 16mm 3 core swa feed a 9way split board in shed, 30m from incomer .. from the split board I have run a 10mm 3 core swa to 2 way board for hot tub. This has a 63amp rcd in it.. the other end at the split board is also a 63amp rcd on its own of one side of the split board.. this...
  10. A

    UK 2armours supplies dist board

    Hi, wondering if anyone has seen this before. At a job today and the supply to the 3 phase dust board is 2x16mm armours. One has three phases in it the other armour has the neutral and earth. Bit rough I think is there any regs on this ? Any help would be great.
  11. K

    UK Unsure SWA cable size I have?

    Hi guys, hopefully somebody can help. I have some driveway lamp posts with the armoured cable installed though the middle of the concrete pad. Unfortunately whoever installed this did a rubbish job as the concrete is not level and the posts look awful. I was going to cut the cable and dig out...
  12. T

    SWA cleats for 3phase

    Does anyone know what size SWA cleat fits around 4 25mm tails and 16mm Earth? Need to hold some tails back for a 3phase board i have just done Cheers
  13. B

    Ethernet/Power SWA cables - can they share space ??

    Hello all...…. I would appreciate some advice please as there is lots of conflicting opinions on the interenet. I wondered if anyone new the actual UK rules and regs or sensibilities :) with regards to ethernet installation alongside power cables in a trench ( I appreciate the whole high...
  14. kenburgess

    SWA Glands : Poor Fit

    Background: Served my apprenticeship 1964 to 1969 with NORWEB but not been directly employed in the industry since then. I have just laid a 10mm 3 core SWA cable in a trench under the patio from the house to a detached garage 8.5m away. (cable run will be around 18m to 20m). There won’t be...
  15. B

    5 core SWA 120mm pvc cable

    Hello all So Im doing the groundwork to install a electrical kiosk and lay 250m approx. of cable to live up an off grid property. I am not an electrician i am only doing the hole digging and slab making for the kiosk - I will not be wiring anything in - not my thing :) a qualified company...
  16. T

    Ring main in 4Core SWA

    Evening all Has anyone ever wired a ring main in 4Core SWA and used the sheath as an earth? Just looking at wiring some sockets in an industrial unit and wondering whether to do it that way or do a 4mm radial
  17. G

    Burried SWA for a log cabin

    Hi all, Hope someone can give me clarity around the need to bury an SWA cable please. I've been asked to install an 4mm SWA from the main DB to a "to be built log cabin" at the end of the garden about 50m away, it will need to run along a fence for most the route (or underground). I called...
  18. C

    School block Swa supply

    What code would you give for a Swa supply 3p/N,95mm. Supplies remote school block,2 storey,no main earth conductor,using sheath,the main earth bonding originates from this Swa,for this block,@ Main Panel board,& is 16 mm The main earth @ origin is 120mm,Main bonding 50mm. Cheers
  19. happyhippydad

    Tails or SWA?

    My customers meter is being moved. The distance to the consumer unit will be approx 10m. I'll be installing a metal switched fuse in the meter. I cannot run any cables up the outside as it is having some kind of wooden finish and the customer does not want anything else on show. I can only see...
  20. S

    SWA earthing

    I’ve seen debate in the past on here about whether to earth both ends of SWA at the glands even when using 3 core with a core as the cpc. My question is: If I gland the load end and earth the banjo there, then gland the supply end but run the 3 cores straight through the building skin so there...
  21. C

    Terminating various Swa into Main Panel Board

    Installing panel board,swa’s from 70mm to 16mm,all sub mains,using extension cableways,but struggling to terminate in the top areas,anyone know a better way,than steel trunking across the top of board.
  22. C

    Swa torpedo joint oh my

    Just wondering any of you guys had trouble with some of the ridiculously small joints they give you. celepack, 16mm 4c,70 mm 4c,Swa underground kits. Struggled today on the 70mm,fitted a bigger one for 120 +,
  23. L

    SWA gland earthing

    Hi all, Just having a chat with a customer who we do regular maintenance work for. They have had an extension and got another company in to do the electrics due to us not having the time. The main reason for the post is the installer has used self tapping screws on all the swa glands. Is there...
  24. G

    Insulation on swa in a board

    Hi gents Whilst I am qualified as an electrician I am a maintenance engineer so don't do much installation work hence seeking advice here. I recently installed a new 3ph distribution board for a new machine. As I don't have my testing and inspection ticket another person did the minor works for...
  25. happyhippydad

    Can I use the sheath of the SWA as the CPC in this example?

    Morning.. I have a garage fed by 4mm, 2 core SWA. It is a 25m run from the CU. Can I use the armour as the CPC? The Main house is TT. I have always used 3 core so have not come across this before. i am about to check my notes as I know I have information on this and will find the formula to...
  26. T

    How to work out the total design load to find my swa cable size

    Hi all I am having trouble trying to work out the total load and swa cable size. I have 10 circuits in a outhouse 40 meters from the mains power supply 1 x lighting with 10 lights, 1 x lighting with 10 lights. 1 x 2.5mm radial for 2 heaters, 1 x 2.5mm radial for heater. 3 x 2.5mm socket rings...
  27. EViS

    SWA Into Back Of Consumer Unit?

    We've got a new build with all the T&E, earths and 25mm SWA coming through one 60mm cutout in a stud wall. What's the neatest way of terminating the SWA? I'm not convinced that a gland with the earth tag and nut 'floating' loose within the CU, and the 'tails' then running as usual is going to...
  28. J

    Fire proof clips / cleats for SWA

    I need to do a horizontal run of SWA in a garage, first time doing it to 18th. Any suggestions / recommendations for fireproof clips for SWA?
  29. Martyn Campbell

    Domestic Wiring to Garage under floorboards SWA Required?

    Hi, My Garage is attached to my house and currently there is a standard 3 core cable running from my consumer in there. I have just had my consumer upgraded/replaced and starting renovations on the bedroom directly next to the garage so would like to replace the cable as well. As the cable...
  30. D

    2.5mm 2-core SWA for EV point?

    As the charging point must be outside the DB equipotential zone (separate earthing rod), are people using 2-core SWA for EV points and eathing via the armour?
  31. B

    Wiring In a Shed, advice needed on SWA route

    Hi All, I have a couple of questions regarding running SWA cable between the Internal House CU and The Shed New CU. The shed is basically being used as a home office and as such has a 6A lighting circuit and 16A Circuit for Socket outlets. Will be running a couple of computers and Monitors...


    Is there any requirement or logic to using fire-retardant cable cleats for SWA inside a wooden shed? There will be a 2 metre vertical run and a 3 metre horizontal run of 4mm 3 core SWA.
  33. Barnaby Stedman

    SWA - too short!!!!!!!!!!!!!!!!!

    been working on site today - came across someones bad calculations - there is 6mm swa in a ducting underground and it only comes out of the ducting at one end! i managed to dig down to the ducting and found the other end buried underground. So what is the best way of connecting two pieces of...
  34. Baddegg

    10mm swa to 10mm t&e....

    Need to join 10mm swa (2 core) to 10mm T&E within a wiska box.....
  35. SparkieMarky

    Termination of SWA into new style flush Consumer Units

    Does anyone have any thoughts on the best way to terminate an SWA into the new style flush CUs such as Hager's, BG's etc.? I ask as all seem to either employ oval or square knockouts, which is great for the surface boards when using truncking etc. but no great if you are trying to comply with...
  36. D

    Terminate SWA in Wiska or straight to Garage CU

    Hello all, I wanted to know the best approach of connecting to a Garage CU. Currently planning a small wiring project that i want to do in a few months time, when cash and time allows. My plan is to do the work myself and go through the proper channels of notifying the work to the local...
  37. O

    Domestic New SWA 3core cable 2.5mm2

    Hello, free Electrical Advice please. Before I call a sparkie to upgrade my consumer unit I thought I would bring my outside power up to date. I have a twin+earth 6.0m2 under my floor, running outside to my shed and into a 2 way consumer unit, lights and power. As far as I can remember this was...
  38. G

    Volt drop Question SWA

    Hello All, I’ve been asked to install a cable 170m in SWA, this is to be pulled through ducting. The cable is straight from the meter to an isolator in a beach hut. As the property is so small with little electrical appliances, I have accounted for 45A max current and deduced a 35mm2 SWA. Is...
  39. Fitzy

    Domestic SWA outer armour not earthed at either end.

    A friend at work asked me to take a look at the electrics in his shed, RCD would occasionally trip out, turned out to be a very loose neutral going in to the RCD. One thing I did notice though was that the 10MM2 SWA entered through the back entry point of both the shed & house CU and neither...
  40. V

    Advice needed on wiring for a log cabin

    Hi guys, Me and my partner have recently decided to build a log cabin at the back of her mum's house. The electrician that the company's working with, is planning on using a 316 swa as the main power cable, but I have concerns as the cabin will be used as a permanent dwelling for a while and...
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