ducting | Page 2

ducting

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  1. D

    Underground electrical service ducting / containment : colour coding?

    Evening all, Could someone advise if there is a regulation/guidance note that defines colour coding of underground ducting / containment for electrical services, I assume the 'accepted' colours of yellow -gas, blue - water and black - electrical are standardised but I could not see where this...
  2. P

    Cable Selection for an External Sub Building

    Hi all, I'm currently doing a load of landscape gardening and while I've got all the earth up I want to run an armoured SWA cable to an external building. Someone already put something in as a spur from main room ring mail in the house - not ideal and the wall switch for it gets hot under load...
  3. J

    cable ducting without pulling rope installed

    Hi, Just wandering what to use to get an armoured through a new duct which has been installed prior to me being on site without a pull rope. Longest run is about 30 meters with probably 2 bends and is about 3 inch diameter but is the flexible type with ridges. Will rods go that far and round...
  4. Energetic

    Flooded Ducting and Low IR so

    Morning all, Pulled up a couple of string cables from a section of ducting that has been flooded this week. IR tests are low and indicate a problem. Inverters RCMU's are not liking it. No visible damage or problems with the cables so just wondering if its possible that they can absorb water...
  5. S

    Underground twin wall ducting

    Hi guys, just looking for a bit of advice on what to use. As I work in new build commercial work, trenches and ducting is installed by grounds workers so usually just pull through what they installed and to services hatches ect. however what I'm wanting to do it lay 2 X 50mm ish twin wall...
  6. S

    Commissioning continuous mechanical extract ventilation or cmev in domestics

    Hi all, I've tested a bit of heat recovery before so mev is much simpler, just started testing a plot today. Theres 3no outlets;kitchen, down stairs wc and bathroom first floor, all leading to the loft where the mev unit sits. Was looking for around 7l/s at trickle mode at all outlets which...
  7. S

    125mm MeV ducting system best jointing methods

    Hi all started work subbin for a new company and currently on a new build. mev system going in comprising extract from kitchen and all wet rooms. 125mm round PVC ducting, elbows etc. all pipes are individual and go to the loft to a common extraction point where they are exhausted through the...
  8. J

    Cable ducting under new kitchen floor slab

    I want to lay conduit under a 100mm concrete kitchen floor slab that will be poured in a couple of weeks time (to complete a ring and connect a kitchen island). This will be in preparation for my electrician to do all wiring once the builders are done. Does anyone know if I will need to use...
  9. K

    Bathroom Extractor Fan - Ducting Problem

    Hi everyone - This is weird - not strictly an electrical question, as I'm comfortable with what I've been asked to do in that area...I've even tested the fan in this job works as expected and it does. Fine. BUT... I've been asked to install a number of bathroom extractor fans in an old hotel...
  10. driverman

    Shared u/g ducting

    Hi Guys, Doing the electrics for family member. AHSP being installed. Unit sited by detached garage. The 4 core SWA and the freezer pipes are proposed to be installed u/g in 1 x100mm dia pvc ribbed cage ducting (like the DNO's use) between house and detached garage/ unit. I have said the...
  11. vxwestie

    Fan ducting

    Probably a simple question, but what's required by building regs on new builds for the ducting of extract fans these days? Especially where the duct passes through the loft space ... Is the aluminium or PVC ducting still permissible, or does it now have to be insulated etc? I probably have...
  12. D

    stupid ducting question....

    Probably a silly question... Just wondered what the difference is between insulated and acoustic insulated flexi duct?
  13. H

    Ducting recommendations for SWA cable.

    Hi, I'm looking for some recommendations for ducting to use with SWA cable. Ideally it would need to be a large enough diameter for a couple of cables. Would be interested to know what you guys use, or have used and where it can be obtained from. Thanks.
  14. G

    Eicr Code

    6mm singles from 100a TP 60947-2 in a main panel to an adcent enclosure to a 16a 60898-D Tp, then 6mm leaving this to air con units. Would you code 2 the 6mm singles from the 100a 60947-2? As exceeds current carrying capacity?. Or because the 6mm singles are less than 3 metres to the enclosure...
  15. 1

    Extraction ducting

    Hi I am in the process of buying a building that has extraction ducting covering the ceiling with electric motors/fans still in tact within the ducting. (See pic please) Is there anybody out there that would be interested in buying this or can make a kind suggestion of anyone I can contact...
  16. grumpyjohn01

    Ducting / conduit in concrete floor

    Am quoting to wire kitchen in a very old farmhouse (high end, very 'beamy' with fragile walls ceilings etc) and am proposing to wire under the new concrete floor slab which is being laid. Having read previous posts on the subject, consensus seems to be to use good quality PVC conduit. Thinking...
  17. HappyHippyDad

    Where to find a ducting 'Y' pice with a non return valve??

    Does anyone know where I can get a ducting 'Y' piece with a non return valve? I have looked all over the internet and cant find one, perhaps the answer is to use both? I need one of these: which has this: Cheers all...
  18. P

    New Zealand providing ducting for replacement feed

    Power networks are to provide a new feed from roadside to understairs cupboard....as original cable cut by fire brigade when house was burning down.We have to lay the ducting...I understand we need 38mm o/s dia. 32mm inside..do we need specialized stuff ie. markd "elec" i guess the feed will be...
  19. M

    95 mm 4 core cable, 30 m run, in ducting under buildings backed up by 200 amp fuses

    Hi all, I commissioned the renewal of some mains intake equipment at a building that involved a full shut down. The building runs 24/7 and so a shut down is a VERY rare event. Upon completion of the works the contractor informed me that the 95mm 4 core cable feeding the building was being...
  20. M

    inline ducting fan removal

    does any one know how to remove a 315 mm inline duct fan motor, without dismantling the ducting? can get to the exhaust side just but not the other without major dismantling, scaffold etc

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