swa

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  1. S

    Insulation test L to E long length of SWA

    Insulation test live to earth = 0.7 ohms. This is a long length of buried swa cable (approx 100m) from mains in to submain. Test done with live and earth disconected at main and with switch off at sub main. Question - is this an accurate reading or am I misding something. Its a big job to...
  2. S

    UK Amtech/Trimble - Excessive Earth Loop Impedance on SWA cables

    Hi All, I'm new to Amtech/Trimble and I've been asked to review a model. I'm looking at circuits that are SWA cables using the armour and an internal conductor as the CPC. There are various earth loop impedance errors listed where the Zs at the load end is too high, but what I can tell, Amtech...
    • Steve W
    • Thread
    • cables cpc earth earth fault loop impedance impedance loop loop impedance swa
    • Replies: 4
    • Forum: UK Electrical Forum
  3. lozarus

    Interesting SWA Cable

    Was having a poke around the old man's house today. Anyway. DB is under stairs (18th ed following a recent extension. Not done by me but it's done well.) There's a submain in 2 core SWA feeding an old 2 way Wylex in the detached garage (lights and a socket radial). Entire sub is fed from a 16a...
  4. R

    Cottage supplied by 16mm SWA 300+ yards! Trying to resolve a high Ze reading

    Hi, while carrying out an EICR at a farm cottage on Friday i came up against a problem early on. Whilst measuring the Ze the reading i obtained was 0.97 Ohms and 27Amps Pfc. Now the earthing system itself is quite strange. Next to the consumer unit is an old service head holding a 60A BS 88...
  5. T

    Can SWA be run in the same metal trunking as singles?

    I have checked the regs and can't find anything to say this can't be done. Although I'm worried about cable movement in the case of short circuit damaging singles in the trunking
  6. sythai

    Gas meter 'vs' SWA cable proximity

    Hi Guys Would I be correct in thinking an electric cable can be as close as 25mm to a gas meter ? (not that I'd ever be that close out of choice) Or is it the 150mm reg as with proximity to consumer units, sockets, accessories... Had a quick scan in my on-site guide but not so clear - been a...
  7. S

    50v on swa banjo ? TNC-S system new build

    I’ve had a weird one today. Banjo having 50v on it. L - main earth = 230v L - N = 230v N - main earth = clear I have 50v on the live - banjo & 24v on the Neutral - banjo. Disconnected both sides of the armoured and done insulation resistance between all cables and all <999.
  8. D

    am2 resit tommorrow swa/ sy earthing

    resitting Saturday my am2 4 sections a3/b/d/e swa and sy failed on protective conductors on both swa i under stand thats the earths i think i used a smaller fly lead from the banjo to the db/ and a earthing nut with the banjo sy think i used a 1.5mm flylead so correct me if im...
  9. B

    Swa alternative for outdoor

    Armoured cable or equivalent to go around garden border for on the ground flood lights everyone using any alternative to swa, will H07RN be OK or not will be on rcbo thank
  10. timhoward

    Uncommon SWA cable with different coloured cores

    I was the 2nd sparks taking over a garden office supply job. The first sparks had fitted 10 sq mm 3 core SWA, but it actually had brown, blue and g/y conductors. The middle was also more like hi tuff in the sense the insulation surrounding the 3 cores resembled a cable in its own right not just...
  11. rrafluap

    SWA Internal Switch, best practice

    Hi, I'm going to be installing an outdoor socket, have no problem with the outdoor/socket side, but when bringing the internal end or the SWA into the property, need to be able to switch it. Only have hollow plasterboard void to mount fused switched spur to. But unsure of how I should terminate...
  12. Neptune

    Brick wall lights - SWA cable connections

    For various reasons out of my control, we have wound up in a situation where we have 1.5mm SWA cables buried in these pillars and exiting out of the plastic housing for the wall lights. There are around 5 of these lights across the 5 pillars. Daisy chained with the 3 core SWA. As you can see...
  13. KeenPensioner

    DIY Question - Is this SWA? or Hi-Tuff

    My sister has a cable feeding an outside boiler (see image). I want to tidy it up by adding a new piece of cable as shown. I can't see any ends of the existing cable to determine whether it's SWA or Hi-tuff. Is there any way of determing whether this cable is swa?
  14. B

    SWA to submain and NSH

    Hi guys, Can I ask you a DIY question? I'm refurbing a detached garage and adding a garden building. Garage currently has a submain supplied by 10mm T&E on catenary from the house. I want to replace this with buried cable from house to garage submain, and from garage submain to garden...
  15. V

    Extending tails - SWA or Hi Tuff ?

    Just wanted to know which people use. My case. Client converting attached garage into new rooms. Consumer Unit has to move to accomodate this and will be greater than 3m from meter. Void above garage is used to route cables to main house so can use this to route cable for extension to tails...
  16. J

    For Sale SWA 10mm drum for sale

    I have a drum of 99.9 metres of 10mm SWA 3 core. Probably 2 years old, it's been sitting in my container for the last year, and I'm sick of tripping over it. Anyone like to make an offer? I'm on Hayling Island, and could deliver within reason if the price is right.
  17. F

    SWA and separate conductor as CPC

    Evening all, Having a debate with a colleague about using the SWA armouring and a separate conductor both as CPC's for a circuit. So in theory bringing down the Zs of a circuit due to using both as CPC's. I'm swaying to thinking this is wrong however, I'm struggling to find any regs to express...
  18. mak

    Question about earthing the armour of SWA

    If cpc core is present i.e. it's either 5 core three phase or 3 core single phase — is a banjo connected with a brass screw into steel trunking adequate to earth the armour(provided trunking is earthed to the earth bar)? Or would you put fly leads in between then a fly lead to an earth bar? Thanks.
  19. spuff01

    Industrial Radials in SWA

    Hello all, Trained years ago, not done much for about a decade but I've been asked by a friend to add 5x double sockets into an industrial unit, my thinking is to use a radial 32A RCB, 4mm 3-core SWA cleated to the wall (moderate impact risk). Area is small, only about 2-3m from the...
  20. Y

    Alternative retro fit earth tag options for SWA?

    I'm working on a system that has been installed incorrectly. It's a 3ph Hager board with 8 swa cables glanded into the bottom entry panel. The install is fine except the earth tag (banjos) haven't been fitted and they have relied on the metal plate as an earth. My question is, can you get a...
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