phase

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  1. M

    3 phase RCD question

    Hi everyone, each leakage question here. I am needing to run some LED screens, professional type, not TVs. These are 500mm x 500mm panels and traditionally have 2/3mA leakage per panel. So we generally have a 63A three phase distro with a 300 mA on input and multiple outputs protected by 30 mA...
  2. M

    schneider impulse relay for 3 phase switch all

    Hi all I am new to this forum and hope this is right placed and of interest. I would like to make a setup with one or more impulse relays, controlled with one pushbuttom. It should make it possible to switch off 3 circuit breakers in the house cabinet, all on different phases. Schneider makes...
  3. P

    3 phase and borrowed neutrals?

    Hi everyone, I want to repurpose an old cable that was previously used to power a 3-phase machine. The cable is 4L1.5 micc, and I don't want to replace it unless I really have to, as the cable run is convoluted/inaccessible to say the least. It was obviously installed before many other things...
  4. S

    Running 2 phase in swa

    Due to an increase in load for a subman, I now need 2 phases for an outbuilding. Original design was 63a supply, but now an electric shower and another ac unit has been added due to a design error. Questions are, can you get a 2phase mcb to fit a schnider PoN board? Are you allowed to supply 2...
    • stay away from the grove
    • Thread
    • phase running swa
    • Replies: 23
    • Forum: UK Electrical Forum
  5. C

    20kVA single phase generator grounding question

    How should grounding be made to a 20kVA single phase generator set feeding a domestic property via a manual change over switch? At the generator's alternator neutral is bonded to earth. The generator will be some sixty feet from the mains input box of the property fed by SWA cable. The...
  6. H

    Testing PFC on a three phase board with 100 amp From the meters tails

    I’m currently doing some testing on some site temps I have a three phase trip system the tails from the head go into a 100 amp RCD which feeds a board I’m trying to do a pfc on the db but it comes up with 2 lead high which trips the RCD I tried on 2 lead low however came up with 20 amps which...
    • haydengraham24
    • Thread
    • amp board meters pfc phase tails testing three three phase
    • Replies: 8
    • Forum: UK Electrical Forum
  7. M

    3 phase power connection upgrade

    Hi we want to upgrade our single phase power to 3 phase power at our commercial premises. 3 phase is next door just beside our doors. We need 67 kv of power for our sunbed shop. Will electrical supplier need to put new cable or they can connect us to existing one ?
    • Martin098
    • Thread
    • 3 phase connection phase power upgrade
    • Replies: 5
    • Forum: UK Electrical Forum
  8. M

    3 phase supplies for table & band saw

    Hi all, I have been asked to install individual three-phase supplies for a band saw and table saw. Having trouble figuring out the correct cable / breaker sizes required (I’m a marine electrical fitter and it’s been a long time since doing this sort of works). I currently have an Eaton...
    • Marine electrical fitter
    • Thread
    • 3 phase phase supplies table
    • Replies: 15
    • Forum: Electrician Forum
  9. OnlQQker

    Terminating a 400A 3 phase supply

    Got to say they made a nice job of this, especially the glanding process
  10. G

    RCD type- A or B to supply single phase UPS

    Been looking at what type RCD should be fitted for small single phase individual UPS. Looked at Hager rcd selection guide under type B has 3 phase UPS but nothing for single phase . https://hager.com/uk/support/regulations-18th-edition/selection-of-rcd-types I am hoping type A will do ...
  11. G

    Adapting a 3 phase industrial machine to single phase

    Hello, I am hoping this is in the correct forum. To start, I acquired a film processing machine that runs on 3 phase. Now before getting the machine I fully understood it's power requirements and the cost of getting 3 phase installed at my house. I figured as processors are mostly a few...
    • Gareth Blackstock
    • Thread
    • 3 phase ausie elec industrial machine phase single single phase
    • Replies: 19
    • Forum: Australia
  12. E

    Three phase rcd protection

    Hi guys, I am rewiring a commercial launderette with 3 phase machinery. Does the machinery need to be RCD protected being in commando sockets. The sockets are not accessible to the public and each circuit is being used for a specific machine. With the price of three phase rcbos the...
    • Electric joe
    • Thread
    • commercial 3 phase phase protection rcd three three phase
    • Replies: 5
    • Forum: UK Electrical Forum
  13. U

    Isolation sliders getting stuck on 3 phase distribution board to the point of partially braking off

    Anyone else had the same issue? Since this company keeps replacing machinery very often the MCB's get changed a lot so over time the slider contacts doesn't engage properly anymore.
    • u2v2w2
    • Thread
    • 3 phase board distribution distribution board getting isolation mcb off phase point stuck
    • Replies: 6
    • Forum: UK Electrical Forum
  14. C

    Battery Dual phase Solar install with Battery - Getting batteries to cross phases.

    Ok so I am an electrician but don't really do solar, my partners sister has a holiday let complex, due to her energy bills rising to £36k a year they are going to get a solar and battery storage system installed... They generally close over the winter so the load during the winter will be just...
  15. J

    Measuring 3 phase usage with a clamp meter?

    Good morning, I have a 3 phase supply into my workshop Hager dist board. I need to measure my usage for business accounts. My Electrician mentioned clamping around the swa cable with a ct clamp would be a simple metering option, but I'm not sure if I understood him correctly. Is this...
  16. I

    Three phase equipment RCD protection on a TT system

    TT system, existing three phase fuse board recently installed by another spark which only has single phase circuits terminated into individual RCBOs Required to install three phase circuits for new equipment, is there a better way of doing this than fitting a 4pole RCD ahead of the main switch...
  17. P

    3 Phase meter with single phase imbalance

    We have two single phase heat pumps on two phases of a three phase supply the third phase has an immersion heater. The heat pumps are set up as master and slave with the master doing virtually all the work (22000kwh/an). We also have a three phase 15Kw turbine. generating 45000kwh/an Our...
    • Pembsflyer
    • Thread
    • 3 phase meter phase single single phase
    • Replies: 4
    • Forum: UK Electrical Forum
  18. L

    discharge higher than 3kw with ac coupled 3 phase

    hi guys i'm trying to get my head round the following setup growatt TL3 5kW 3 phase string inverter 14 panels @ 395W Spa3000 TL ac coupled controller - unless there is a alternative mcs approved one available growatt ark 4x2.5's with bms will i be able to draw 3 5 or 8kw with this setup please...
  19. M

    What can happen to 220v Devices if I connect a 110V phase to both wires

    Ok, i am new in this forum I am looking for some enlightenment. Today I got a call from my boss, which is now in Venezuela and he is connecting a 4000W 100v power plant at his condo. The electrician he found there connected a 2 Throw Switch Knife to the circuit to split the power coming from the...
  20. J

    UK Old Three phase UPS wasting electricity?

    I'm hoping someone can sanity check or correct my thinking. I have a very old UPS, it's showing a power factor on the front display of 0.1 We put a clamp meter on the 3 incomers which all read 36 Amps. the 3 outgoing legs are showing 12, 6 and 4 Amps That's 108 Amps in and 22 Amps out, I'm...
    • jimbobbrad
    • Thread
    • electricity old phase three three phase ups
    • Replies: 3
    • Forum: UK Electrical Forum

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