sizing

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  1. H

    Storage Heater Sizing

    Hi I will soon be fitting a 0.9kw storage heater. it has no user controls so I will be using a d/p fused timer switch (recommended in installation instructions) I will be using 1.5mm heat resistant flex from the dp switch to the heater, but am just wondering if I should use 2.5mm to power the...
    • harold_dcfc
    • Thread
    • heater sizing storage storage heater
    • Replies: 19
    • Forum: UK Electrical Forum
  2. B

    Sizing Contactor to control Photovoltaic DC

    I know this is a U.K. site but I'm hoping someone will be able to answer a qn. Recently I saw a that a company was producing a remote disconnect safety system for PV panels mounted on a roof.This is to disconnect the arrays automatically if the mains is disconnected or manually after a storm or...
  3. R

    down sizing long lighting circuit

    I'm testing a car park lighting circuit at 200m long. 4mm singles to first point at about 100m and then reduces down to 2.5mm. Trunking used as additional CPC to reduce Zs values. How would you record that on a test sheet? And is there a regulation about downsizing?
    • robhawk
    • Thread
    • cable circuit first lighting lighting circuit long record sheet sizing
    • Replies: 4
    • Forum: UK Electrical Forum
  4. B

    sizing SWA armour as cpc using adiabatic......

    I'm doing a mod for a 3 phase circuit already installed. The only trouble is I can't work out why the existing cables are as they are so i am doubting my sums. Existing final circuit. 3 pole memshield 2, D32 rated feeding 10mm2 4 core swa with a seperate 16mm2 G/Y as cpc. Measurements at the DB...
  5. J

    Cable sizing for 24V LED lighting

    I believe I have been wrongly advised by my supplier about sizing cable for a lighting installation and I was hoping that someone with more experience of DC cabling will be able to set me straight. We are looking to install some LED strips to a coffered ceiling above a swimming pool. I have...
    • jjnr78
    • Thread
    • 24v cable cable sizing led length lighting power sizing strip supplies
    • Replies: 16
    • Forum: UK Electrical Forum
  6. D

    Temp Supply Sizing

    Hi all, I have been queried from a friend on what size of supply to request from the electric board to supply a construction site. The requirements are 5x 32 ft containers, a toilet block and 4 10kva 110v transformers. length of run 20m , containers single phase and the transformers are 3 phase
  7. P

    Importance of Inverter Sizing - Good Read

    I did previously ask if it was ok to post links to external blogs that contained industry related and on topic content. I'm assuming it is ok as no one has said otherwise. Inverter sizing article from our blog Solar Inverter Sizing By Chris Roberts | Poweri Services Ltd Feel free to comment...
  8. S

    Cable sizing help required

    Hi Guys, i'm currently in the process of quoting for a job I hope to win. I need to work out the size of cable required to supply 20 studio flats. i am going to run a supply or several supplies from the basement of the building 16m up an lift shaft then will be approximately 40m through a...
  9. Floody

    Cable sizing

    How do I know what size cables I need to be using for each circuit? e.g how do i KNOW that i need a 2.5 for a ring main. There's odiously a formula for working it out and no doubt included lengths, estimated amps pulled etc. just need some help with it if possible, (Purely a college question...
  10. R

    Fuse sizing

    INTALLING 3 NO SUNNY TRIPOWER 15000TL, SUNNY TRIPOWER 10000TL / 12000TL / 15000TL / 17000TL. SMA UK VIA G59 PANEL, WHAT SIZE OF FUSE WOULD YU RECOMMEND AT AC MAIN PANEL BOARD
  11. M

    Cable Sizing help

    Hi guys, any idea on sizing this please, any help will be great, thanks in advance. A 6kW induction motor (pf 0.95) is to be connected to a 230Volt 50Hz Supply. The motor is required to control a heist in an office furniture warehouse. The motor will be supplied by a multicore SWA cable with...
  12. J

    3 phase cable sizing

    Hi Guys, Little help please.Ive got to install a 3phase mortar silo. Information i have been given. Requires a 16a 5 pin socket outlet (neutral and earth) 100m cable run Max load 5KW 30ma RCD protected Assuming c or d type Its beeen a long time since ive dealt with 3 phase. could someone walk...
  13. O

    Sizing of a Generators Earthing Conductor

    I’m goingto be installing some quite large Generators (1000 Amps plus on each phase) in the next few days will I need to size the EC to Table 54.7 or 54.8? I’m leaningto 54.7 as I think that would be safer, but am I correct or just wasting copper?
  14. U

    Exporting Supply To Garage Extension, Cable Sizing

    Need to supply a cable for a garage extension, 'Plumber' has proposed 2 x 10mm T+E in 100mm ducting along with a water pipe, with no CU at the garage. This will eventually be marketed as an annex which will include but no limited to, 1 shower (power unspecified), 1 electric water heater...
    • ultinator
    • Thread
    • cable cable sizing extension garage sizing supply supply to
    • Replies: 45
    • Forum: UK Electrical Forum
  15. T

    earth wire sizing

    I have always used 1.5mm single earth when wiring sockets in a conduit system, a guy on site just now is saying it should be 2.5mm earth same as live amd neutral conductors, is this correct amd why would it change because u use conduit ??
    • tester11
    • Thread
    • earth earth wire sizing wire
    • Replies: 14
    • Forum: UK Electrical Forum
  16. P

    MCB sizing for parallel cables

    Addition to old installation - routing through trunking to supply a sub-board with two 6mm SY cables. However, I can't find any info on sizing of MCB to maximum Zs for parallel cables - -? Seems to me the problem could be using calculated Zs for the two in parallel as in the event of a fault...
  17. N

    Transformer secondary/cable sizing

    6x 50watt halogen downlights, 12V, 400 VA transformer.(central transformer) Given that the current on the secondary side of the transformer will be 25A am i right to install 2.5mm cable to feed my spots?
  18. C

    Sizing SWA Armoured for CPC

    Something I haven't really done, so am I correct with the Maths? Just looking to reduce costs & use 2 core against 3. Found the Table from the Sticky. Anyhow 10mm SWA is labelled Red & the footnote states the Armoured would not satisfy as the CPC (but maybe by Calculation). So... 2 Core SWA...
  19. D

    The dangers of under sizing your catinery garage supply from your flat.....!

    Exactly what it says on the tin :) http://www.liveleak.com/view?i=25f_1344496418 .
    • Darkwood
    • Thread
    • flat garage sizing supply under
    • Replies: 5
    • Forum: UK Electrical Forum
  20. M

    cable sizing for 400a 175m 4 core

    hey, ive been asked to work out a cable size for someone and not sure on the sizing for the amps. the information received is that its to be armoured, 4 core and the distance is 175m and needs to carry 400amps. is there a cable big enough or will they have to run two in parallel. thanks
    • matt12321
    • Thread
    • 4 core cable cable sizing core sizing
    • Replies: 17
    • Forum: UK Electrical Forum

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