3-phase

Recent contents Top users
  1. H

    MEM 3-phase board

    Morning all, As the regulars know, I work in a school part-time (while sparking part-time), and I'm going to do a bit work for them - they need power dropping in for 11 PCs. No problem, 2 RFCs should do to share the leakage currents of the machines, bit of dado trunking round the room, RFC...
  2. D

    3-Phase Motor Testing

    Hi I'm Darren and I work as a apprentice for a manufacturing company. I was testing a 3kw 3-phase motor as it blew a fuse and when doing my IR test down to earth I got a reading of around 11Gohms. I was under the impression that the reading had to be above 1Mohm which this is as far as I am...
    • Darrensparky
    • Thread
    • 3-phase apprenticeship industrial insulation resistance motor testing
    • Replies: 9
    • Forum: Electricians' Talk
  3. S

    3-Phase / 400V ring main

    Hello, New here, but hopefully someone can help...! We have been tasked with installing a number of very small pumps (21 in total) on a large site. Running individual cables to the 7 areas (3 x 1.0kW / 400V / 3phase / DO.L. pumps in each area) where these pumps are located would be expensive...
  4. G

    3-Phase Supply Configuration, Mixed Commercial and Residential Installation

    I have a potential customer, in Scotland, with mixed commercial and residential premises. The property was formerly a pub with a property of multiple occupancy upstairs. The property currently has a 3-phase TN-C-S supply coming in to the DNO's fused distribution box in the attic, second floor...
  5. S

    63A 3-phase electrics possible through 6mm cable ?

    Hi, Is it possible to get 63A 3-phase through 6mm cabling/wiring ?
    • shotgun1
    • Thread
    • 3-phase 6mm cable electric electrical electrics possible through
    • Replies: 12
    • Forum: UK Electrical Forum
  6. suffolkspark

    3-phase sub-main sizing

    hi chaps, I've got a 3-phase supply to get in and am not overly experienced in 3-phase cable calcs, basically the run is 60m, it will be buried, and it needs to run one 3 phase 16A boiler, a couple of single phase socket outlets and a couple of lights. hope somebody can shed some light
  7. M

    Mains on 3-phase DB

    Hi I am working in a hotel and I found that a 3-phase DB was fed by 2 seperate swa cables one containing the 3 phases and the other a seperate neutral and earth I know this is bad practice but can someone tell me why the NIC firm have picked this ad a fault I would not have done this myself it...
  8. B

    3-phase Roller Shutter Door - Opinions please

    Hi guys, recently been given a job to supply power to a 3-phase roller shutter motor in a warehouse. The cable path is to follow the a-frames of the roof on 50mm tray with girder clips (to span the warehouse) then tray along the wall to the motor.. must i use SWA? its a 75 metre run in total...
    • benpdixon
    • Thread
    • 3-phase door opinions please roller shutter
    • Replies: 8
    • Forum: UK Electrical Forum
  9. S

    3-Phase Cowboys?

    Hi all, I was sent to a job the other day to put in a supply for a new 3-phase motor. Our projects department decided instead of installing a new circuit from the DB which was situated 10 metres away wanted me to cut an existing three phase 32A SWA supply, feeding another motor and install a...
  10. M

    3-phase motor question

    Can someone give me some advice please? I sat my C&G 2394 exam this week. Passed the practical, failed the multichoice by 1 question. Written paper next week. My question relates to one in the multichoice paper. What is the correct sequence for safe isolation on a 3-phase motor? Can't...
  11. D

    Earthing arrangement and single to 3-phase upgrade

    Newbie here - please go easy on me, and I hope I'm posting in the right forum! ;) Existing arrangement as follows - single phase TNC-S supply provided in a remote building. This building has a substantial 3-phase company supply, but my supply is tapped off the incommer, and through a a single...
  12. C

    Dimplex 3-phase Air Source Heat pump (with Heatmeiser Control manager)

    Dimplex 3-phase Air Source Heat pump comes with Heatmeiser Control manager. Selling for a Customer - this item was unpacked, placed into position and wired and plumbed in. It was never, however, used as the Electricity Supplier could not install 3-phase power to plot as agreed. This unit was...
    • Clowts
    • Thread
    • 3-phase air source control dimplex heat manager pump source
    • Replies: 0
    • Forum: For Sale and Wanted Forum
  13. W

    3-phase Pannel Meters

    Hi Guys, I need a bit of statistical info: The main pannel in our rugby club ( MIC 150 kVA ) is fitted with an LCD meter ( displays: A, V, Power ( kWh. KVAr,kVA ) and a 4th screen I've not figured out yet ) where the main 3-phase comes into the pannel and also has the master On/Off Switch for...
  14. A

    3-phase worries for football stadium audio equipment racks

    I was recently surveying a football stadium and the amplification racks for two of the stands were in one location. The equipment was mounted in 3 separate racks each housing about eight 400 watt amplifiers (real long term power not home hi-fi peak/transient power) This makes for quite a...
  15. R

    Which type of Speed Controller required for 3-phase motor

    Hi all Client requested speed controller for 3-phase/4KW/7.9Amp motor running extractor fan to spray paint booth in local car mechanics Have been advised I require SYSTEMAIR RTRD 14 SPEED CONTROLLER VSD VFD IMO INVERTER DRIVE FREQUENCY Reconditioned and load tested unit available at £240.00...
  16. P

    Energy Consumption on 3-phase with solar into one phase

    Hi Quick question about a system a user wants who has 3-phase electricity. If we install a 4kWp system onto one phase, when it is generating more power than is being used by that phase, will the other phases consume that power, thus slowing/stopping the meter, or is it lost back to the grid...
  17. D

    3-phase power calculations

    Hi, I am a trainee electrician and have some questions concerning a 3-phase installation. I have been asked to calculate the maximum load of a supply at a factory and have the following information. I realise the best option is to use a clamp meter and measure the voltage and current load across...
  18. M

    4KW/16A and 3-phase

    Hi This is just a sanity check really. I want to install a 4kW system in a building which has 3-phase supply. Assuming I keep the inverter under 16A are there likely to be any issue with the DNO (Western Power!) over only pumping it all down one of the phases? Thanks
  19. B

    3-Phase Queries

    A 3KW, 3-phase, 230V motor draws approximately 13Amps (if my calculations are correct)............. I imagine this is the rating for each individual phase? What rating should I give my breaker? (Formula?) If I take two phases for my control circuit, which formula could I use to fuse my circuit?
    • Barry Dummigan
    • Thread
    • 3-phase aus
    • Replies: 12
    • Forum: Australia
  20. S

    Question regarding high Zs on 3-phase motor circuit using BS88 fuses

    Industrial installation (non-domestic). Here's the scenario: A large (150kW) 3-phase motor circuit where the supply is taken from a starter fitted with 315A BS88 HRC fuses. From calculation using the cable data, the Zs value exceeds the manufacturers requirement for 5s disconnection time...

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

Tags

advice aus cable circuit course earth electric electrical electrician hello led light lighting lights looking new please question rcd socket supply switch testing training wiring
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock