primary

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  1. D

    How to move primary ground at water heater.

    Hello, from North Texas, I am a long time DIYer. I have a question about possibly changing or moving the electrical ground from the electrical load center, breaker box, that is clamped to the cold water copper supply line at the electric water heater. The breaker box is marked "Primary ground...
    • don6267
    • Thread
    • ground heater how to primary screwfix water
    • Replies: 5
    • Forum: UK Electrical Forum
  2. R

    Does anyone know the BS(EN) for this primary supply overcurrent protective device device

    Can anyone give me the BS no. for this please
    • Ross1
    • Thread
    • anyone device knowledge overcurrent primary protective supply
    • Replies: 10
    • Forum: UK Electrical Forum
  3. UKMeterman

    Wanted supplier 15:5A wound primary Current Transformer

    Hi, I am looking for a 15:5A CT supplier, Farnell don't do them, any others? Thanks
  4. Lou

    CBS Electrical Services

    Prior to establishing CBS Electrical Charles Stewart (owner), was the electrical supervisor for a large plc, in partnership with Cheshire County Council, looking after most Cheshire/ West / East schools and corporate stock with 30 years of experience in the industry. Charles is therefore very...
  5. S

    Advice required on PowerRail 303 kWh & kW Meter

    I have just replaced the PowerRail 300 with the 303, used existing CT's, 3 phase installation in small work shop. This is the first time that I have completed this type of installation The Customer states that the reading is higher than expected, CT set to 100 amp. I am a little stumped to why...
  6. E

    Help with inverter for Motor home.

    Hi I am buying a new Motor home, & want to do away with my generator. I know that running an inverter draws a lot of power from a Leisure Battery. I found this site that recommends connecting a pure sine wave Inverter to the Engine battery, rather than the leisure battery. I only need to use it...
    • elduderino
    • Thread
    • battery engine home inverter motor primary
    • Replies: 2
    • Forum: Auto Electrician Forum
  7. grumpyjohn01

    Electric Underfloor Heating as Primary heat source under Engineered Wood?

    Hi all, Looking for advice, I am an experienced electrician and have been asked by a customer to install electric underfloor heating throughout a converted victorian chapel as a primary heat source. The customer is open to all options. I am intending to have a professional appraisal from a...
    • grumpyjohn01
    • Thread
    • courses degrees electric engineer engineering going heat heating primary problems salary source students system under underfloor underfloor heating
    • Replies: 2
    • Forum: Central Heating Systems
  8. telectrix

    110v Site Tx.

    bought a 1KVA tranny from car boot @ weekend. bargain @ £8. reason was to have a lightweight one on the van instaed of lugging my 3.3KVA unit about. anyway, gets it home, plugs it in.. no output. so, top off to find that some donut had fitted in-line fuses to bot L and N into the primary. one of...
  9. i=p/u

    Testing 110 Tx

    Anyone test these before and is there anything you know that I don't. from what I see 110v transformer is supplied from 16A protective device which is a sub main circuit ,Then the 2 x 55v lines are protected by 16A fuses Q. Do I just cables upto primary side?
  10. Y

    Primary design

    Hi all, Don't think I'm duplicating here but if I am feel free to delete, my boss asked me to work out the size of a SWA feeding an extension to a commercial property, basically the contractor wants to get the cable in, before the building design has been finalised, so we're basically playing...
  11. B

    contactor for underfloor heating

    Hi I've installed the electrics for an underfloor heating system. The system has 6 manifolds each with a small pump. There is then a primary pump that pushes hot water through the system from an aerobic digester next door. I have fitted 6 contactor each using a switch wire from the thermostat...
    • bennjy
    • Thread
    • click contactor heating primary terminal underfloor underfloor heating
    • Replies: 34
    • Forum: UK Electrical Forum
  12. R

    750kva on 200A primary fuses

    11kv/440-750kva 3 phase tx on 200A primary fuses, spotted this at work, whats the max current per phase you can draw on the secondary without rupturing the fuses.
    • Richard3009
    • Thread
    • fuse fuses primary roman times
    • Replies: 15
    • Forum: UK Electrical Forum
  13. T

    Primary Line Coefficients R,L,G and C

    Can anyone help, how do I calculate Primary Line Coefficients R,L,G and C for a pre determined length of cable, actually the question is asking me to estimate, is there a general rule of thumb to use to do this.
  14. F

    Secondary Switchboard for kitchen from Primary Switchboard

    I am currently working on my kitchen and I am centralising the switches for all appliances (Fridge, 2 Ovens, Induction Hob, Hood, Dishwasher, Washing Machine, boiler and counter sockets) on a secondary switchboard. In order to do that I am running a 6mm multi-thread cable from the main...
  15. M

    primary overcurrent protective device.

    Morning all Eicr asks for characteristics of primary overcurrent protective device which lets be honest sounds straight forward but what if you have 3 phases with 3 separate 300 amp 1361 which supplies a load of other 80 amp 1361 fuses which then supplies your single or 3 phase db which fuse...
  16. M

    110v transformers

    again would sincerely appreciate a bitof help have a client who wants a mix of stuff doing all in small numbers not really my normal work but have splashed out on a seward 250 to accomadate him and having a few issues on a coulpe of things namely 110 v transformers could some one please...
  17. U

    Home-made Transformer - Primary Resistance

    Hi all, This is my first post, so forgive me if it is in the wrong section but here goes nothing. I was considering making a transformer myself and basically if I were to power it through a plug socket, would the resistance of the primary have to be high enough to keep the current below 13A...
    • ultinator
    • Thread
    • primary resistance transformer
    • Replies: 10
    • Forum: UK Electrical Forum
  18. S

    Form filling primary over current protective device

    On the main over current protective device I'm looking at it states 100 amp 1.3/16 DIA does anyone no what type and Bsen num it is as I can't see it in the regs. Thanks Chris
    • schoe
    • Thread
    • current device filling primary protective
    • Replies: 1
    • Forum: UK Electrical Forum
  19. T

    primary current calculation

    First question from the 2391-20 this week 18 x 24 volt soldering irons to be supplied by a transformer via elv sockets, what is the design current of the primary circuit i said the secondary load was 360va so choose a 400va transformer the primary would be 400/230 = 1.73A, am I wrong or...
  20. B

    primary supply on eic?

    hi just filling out an eic and under the section- characterstics of primary supply overcurrent protective device.not sure what to put? the job its self was in a block of flats that has a tns supply, but then each flat has a 60a and a 40a mcb (dorman smith mcb) i cant find any other fuse etc...

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