duct

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  1. A

    Duct For Control/Data Cables on my Own Land (UK)

    Hi, I need to run a duct from our garage, under the (gravel) drive to the house. Specifically this is for a monitoring sensor needed for our planned solar install, but while doing this I'll also run two or maybe three Ethernet Cat5e cables. So nothing above 48V. Are there any regulatory...
  2. R

    Long cooker hood duct ?

    Evening all, Currently 1st fixing new extension however the existing cooker hood duct which was on outside wall will now be part of new utility room and will need extending. Two issues I have . 1 The original duct is 4” flexi and already extends across kitchen for about 2.5metres. 2. The new...
  3. S

    SWA/SY cable in a fibre duct

    OK. I can already feel the eyes rolling I am working in a yard where we are having trouble with vandalism. There is absolutely no way of getting a cable (easily) down the to front gate, as the perimeter is hedging and the car park is concreted entirely. The ONLY duct to the gate from the...
  4. P

    Cable pulling question 25mm 4C in 63/50mm duct

    When putting in some duct for fibre broadband we also put in a few lengths of 63/50mm twinwall duct "just in case" we needed that, as we knew of a few possible use. At the time the biggest load was expected to be of the order of 32A so 4C 6mm ample and no size issue. However we are now...
  5. J

    Cable distance from boiler flue internal duct?

    Hello there! Could anybody help me with this query please, I am not sure where to look up the information I need? As I understand it, cables must be at least 25mm from an actual boiler or gas pipe? But could anyone please point me in the direction of any information regarding any regulations...
  6. S

    50mm duct & hockey stick - new supply

    Laying ducting and hockey stick as preparation for new 3-phase supply which will be installed after front drive is done. How is the hockey stick joined to the duct? I was told by Polypipe technical that that end of the duct slides into flared end of the hockey stick and forms a tight joint...
  7. Michaelwgroves

    Stroma Certification Scheme Gas and Electric in same underground duct

    I need to run gas and electric in underground duct in garden. This is not the supply side, it is the customer side. Wetpants says his regs say "should be 25mm apart for maintenance" I would argue "should" is not "must". Also it mentions for maintenance. You can't maintain a cable 2ft under in...
  8. C

    Bus duct - Earth cable Size

    Bus duct is used to transmit the power from the secondary of the transformer to the Main distribution board? If the cable is used instead of bus duct, we would size the ground cable approximately half the cross section area of the power cables according BS 7671 table. 54.7 If this is a bus...
  9. robd

    Cable duct for under ground SWA

    Afternoon all, On an extension job, customer wants a cable run to a pond which is 70m from the house, for oxygenation and some lights. There are quite a bit of groundworks going in including all the drains which will be running downhill to said pond and are being dug currently. Builders want...
  10. S

    Underground street lighting duct types

    Hi All, I am preparing a document where i need to understand the street lighting duct types used in UK. Could someone help me with the street lighting duct types and sizes normally used in UK. Preferred sizes are 50mm, 75mm, 100mm and 150mm. If not could you guide me to someone who could help...
  11. S

    Cable Duct install in Cement Bound Sand (CBS)

    Hi Has anyone had any experience of excavating to find HV underground cables in CBS backfill? I am being asked increasingly to use CBS (usually about 1:14 Cement/sand) for bedding and cover infill of cable ducts we install. Reason usually given is that apparently it helps with heat dissipation...
    • Stoufer2000
    • Thread
    • break cable cement concrete duct install tools
    • Replies: 4
    • Forum: UK Electrical Forum
  12. S

    Extractor duct condensation

    An extractor fan I fitted has been shorting out due to water ingress. I insulated the duct and sealed the fan to the duct, as well as the cable entry, with putty. But the problem has not gone away. I have now removed the fan as I am concerned about the danger of water on the electrics, and my...
  13. HappyHippyDad

    Which extractor fan for long duct run?

    The customer has a bulk standard axial fan located in the ceiling of a small shower room (approx 2mx1m). The shower room has no door, just an L shape into shower from bedroom. The ducting goes through the loft at a run of approx 5 meters. It pretty much starts off vertical for around 1 meter...
  14. M

    Seperate CPC out to garage - duct or not to duct?

    Hello there. I'm forever looking over these forums looking for advice, and typically I always find an answer, except it seems in this one instance - which is what brings me on my merry way to here today. I was thinking of running a new supply to the garage. Problem is it has a water pipe (only...
    • munty12
    • Thread
    • cpc duct garage out seperate
    • Replies: 19
    • Forum: UK Electrical Forum
  15. uksparks

    Inline bathroom duct fan for two bathrooms, and two switches...

    Hi, I have just been round to a customers house who said he would like to replace his ceiling fans in his normal bathroom and also the ensuite with a new one as I am about to do his bathroom lights etc... Anyway, I said you could go for an inline duct fan in the loft so its quieter which I've...
  16. S

    3 Phase SCR (thyristor) for duct heater

    Hi, One of my project require to use thyristor for duct heater, but my client requirement is 1.thyristor should modulate output power through zero crossing and phase angle control 2. active harmonics filter to minimize THD to less than 5% 3. thyristor and active harmonics filter is compatible...
  17. C

    In-line duct fan run continuously

    Evening all, I have just had a change an in-line duct fan after a week as the circuit board seems to have failed. I can only assume the motor is still fine. It is feasible that other types of fan may run all day (Frequently used toilet, etc) and don't seem to fail often. It is set to run...
    • chronyx
    • Thread
    • duct electricians' talk fan
    • Replies: 8
    • Forum: UK Electrical Forum
  18. E

    Underground SWA (does this have to be in a duct?)

    I have a installation to carry out in a new building and the hotel maintenance and office staff have agreed that the supply (SWA) to this building (the hotels responsibility) needs to be in a pvc ducting as secondary mechanical protection. Along with 2 fire alarm cables. I aint fussed but is...
  19. E

    Looking for suitable duct humidistat

    Got a client with a vent axia low carbon Astra mvhr unit - need a duct mountable humidistat - any suggestions?
    • EssexSparky
    • Thread
    • duct electricians' talk humidistat looking suitable
    • Replies: 1
    • Forum: UK Electrical Forum
  20. S

    Duct Rods.

    Well, i have just been to look at a mahoosive garden lighting project. Landscapers are 50% done and have installed 2" solid ducts to where i need to get to. Been looking at various external duct rods. Does anyone have any recommendations? I must admit, there only seems to be the Dart ones...
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