phases

Recent contents Top users
  1. F

    2 Phase PV Problem with RCDs

    I have just installed a 2 phase system with 2 Solar Edge inverters (3.7kW per phase) Each pv system is fed through a shared Elster A1100 3 phase meter and each one runs fine on its own. When connected at the same time the RCDs on both system trip. The only way I can make it work is to bypass the...
  2. Floody

    400v 3 phase questions

    Hi guys, got a few questions about 400v 3 phase installations. I'm currently working as a mate with a firm who have had a contract re-wiring Boots stores. The installation is 400v 3 phase. I don't think I've done anything on 400v volts before, can anyone give me a quick rundown of how it's...
  3. J

    Different phases for a 13A socket outlet and 5A socket outlet 2" apart

    Hi all. We're currently wiring a large domestic dwelling that has a 3 phase supply. We would like to balance phases as accurately as possible, but due to the lighting control system we have a situation where we have a 13A socket on one phase sited next to a 5A socket on another phase. These...
    • jjnr78
    • Thread
    • allow apart different outlet phase phases socket socket outlet
    • Replies: 11
    • Forum: UK Electrical Forum
  4. G

    Shut off 3 phase supply

    I need a solution for a problem I have, just cant seem to think at the moment. I need to shut off a 3 phase supply when a supply to one phase has failed? Now I am thinking 4 pole contactor, but I am not sure of how to monitor the 3 individual phases on 1 control circuit? 3 control circuits perhaps?
  5. G

    Standby generator

    We have some work to do at a large house in the countryside,that has a two phase supply installed .There is a standby generator being fitted next week,which requires conversion from three phase into two phase,by the generator suppliers.Does anyone know if we need two neutral cables to feed the...
    • g-davies
    • Thread
    • generator neutral phase phases thought
    • Replies: 7
    • Forum: UK Electrical Forum
  6. H

    Correct warning signs for high voltage (potential belt off 2 phases) please help!!!

    Anyone with experience of this or an idea please help. I have 2 phases going going into a cab, each one 230v. However there is a real chance someone could touch the two and get a belt from each phase at the same time. What would be the correct type of warning sign to use? Also out of...
    • harrison2987
    • Thread
    • correct help high voltage off phases please voltage volts warning
    • Replies: 19
    • Forum: UK Electrical Forum
  7. P

    Will 2 out of 3 Phases Trip a 3 Phase Breaker?

    Hello, We've had an issue with a 3 phase piece of equipment that was tripping the 3 phase breaker as soon as it was turned on. On investigation (by a certified electrician) he said it was the equipment at fault. I raised a return of the equipment and the new one arrived today. To be able to...
    • Peter-L
    • Thread
    • 3 phase breaker out phase phases trip
    • Replies: 23
    • Forum: UK Electrical Forum
  8. amlu

    burned mice and 3 phases dead

    had a last minute call out to a shop today. all electrics dead, checked db first, found a fried mouse between bus bars. no power coming into the db, checked on the meter, nothing, checked incomer fuses (100a) they good, no power going to the fuses. advised them to call to DNO. they said...
  9. Floody

    An explanation of Phases?

    Ok so I hear quite a lot the term 'single phase'. & '3 phase'. Can anyone elaborate on what this means and possibly give some examples? Thanks
  10. the pict

    Tri phase board out singles in

    I am doing commercial refurb at the mo, everything is supplied from an old Memshield 3 phase board, the landlord wants the various spaces metered so he can bill the tenants separatly, at present he is just adding a flat rate to the rent, I have no issues with how to go about it however one unit...
  11. S

    G59 Relay

    If we have 3 x 2500wp single string arrays on a 3 phase supply (split evenly over phases) using SMA 2500HF's will we need a G59 relay for sure or is it up to DNO? The SMA's are not G59 as far as I know only G83.
  12. G

    reasons for DNO decisions on limits, transformers and balanced phases?

    Hi all, I just wanted to pick some brains ahead of having a chat with a potential customer. Essentially it's a farm with a single phase supply, but an 11kVA 3 phase line a few hundred yards away. There are actually 3 farms clustered together, and I'm thinking it's likely that they're all fed...
  13. B

    Immersun vs solar thermal

    I am being asked to quote for some solar pv, solar thermal and gshp on a listed building. The solar pv will be a TIC of 10kW. There is no requirement for baths/showers, just hot water for a kitchen. Although I will of course quote and probably fit whatever they want, with the advent of...
  14. T

    415v between phases

    Been at a call out in a block of flats where on ocasions there has been a power surge.On further investigation the culprit being a slack neutral on the main incomer coming into the building. Now i understand that the loss of a neutral can create a voltage of 415V but can anyone give me a proper...
  15. rustynails

    2392 Question - Balanced prospective short circuit current between lines

    The prospective short-circuit current between line and neutral is measured at 900A. The maximum balanced prospective short-circuit current level between lines, as a rule of thumb, can be assumed to be approximately: A: 0.9 kA B: 9 kA C: 90 kA D: 1.8 kA :banghead:
  16. P

    Testing question following successful 2391 result

    Hi all I passed my 2391 about 6months ago and thought I was flying, I know test procedures & how to carry out the tests like the back of my hand and I fully understand any results I get and how to rectify or diagnose any faults in a electrical system.....but then again I have only tested...
    • p11jor
    • Thread
    • 2391 current electricians' talk following phases question result supply system testing
    • Replies: 4
    • Forum: UK Electrical Forum
  17. S

    3 phase or not 3 phase

    Hi all came upon a 3 phase + N supply into a domestic property with only one of the phases being used to feed the c/u. On the cert do i put down 3 phase or single phase thanks john
    • shocked
    • Thread
    • 3 phase electricians' talk other phase phases single supply
    • Replies: 6
    • Forum: UK Electrical Forum
  18. H

    2 phases into standard CU?

    I want to introduce an IR heating system into an existing split load CU. It is supplied at the moment by 1 phase of a 3 phase input, controlled by a 60A main fuse and a 40A meter. The 5 existing circuits are 2 x 32A ring mains, 2 x 6A lighting and 1 x 16A water heater. The total wattage for the...
  19. 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...
  20. S

    Two single phases through one isolator?

    Morning guys, I'm new to this so bear with me! I have two 16a single phase machines that I want to supply with a single cable. I want to use one neutral and earth for two separate circuits. Is this possible? I seem to remember when N is a load carrying conductor, combining two loads could burn...
Best EV Chargers
Best EV Chargers by Electrical2Go! The official electric vehicle charger supplier.

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

TrueNAS JBOD Storage Server

YOUR Unread Posts

Daily, weekly or monthly email

Receive a daily, weekly, or monthly email containing a digest of new and recently updated threads.
UK Tiling Forum | Tilers Forums
UK Tiling Forum by Tilers Forums UK
Plumbers Forums | Plumbing Advice | Gas Forum
Electrician Tips from Professional Electricians
JBOD Forums: a forum for JBOD storage server advice
Back
Top