phase

  1. R

    4pole isolator on single phase

    Hi, I have been asked to fit a 32a isolator ready for an air con unit and picked one up from screwfix. Unfortunately the one I have is a 4 pole, can this still be used with 6mm t&e or do I need to replace it with a 2 pole. If it can be used do I just use terminals L1 & T2 Thanks
  2. J

    UK 3 Phase RCD?

    I have recently started on a site where there is a 16A 3 phase Atex socket which is supplied by a 16A 3 phase MCB. It was picked up on a recent inspection that it needs an RCD. For the life of me I cannot find a 16A 3 phase RCD. I started to think does it really need an RCD? The socket is only...
  3. A

    How to do Troubleshooting on Phase Failure ?

    I met with the following case and get stuck on how to troubleshoot and repair the following problem:- The location is a town house in a complex, with a 3 phase supply. The client has been living in this premises for 20 years. Recently ( 9 months ago) they have renovated the house and have...
  4. Mark42

    Multiple control stations for one three phase compressor. Best practice?

    I'm refurbishing my own workshops and fitting a new central three phase compressor and three phase dust extractor. Both these appliances will be controlled by remote START/STOP switches, next to multiple compressed air and vacuum points, which may be in different buildings. For future-proofing...
  5. I

    Appliances in single phase property damaged by 415v

    Got an emergency call out from a very worried old lady the other night - the power at her apartment had gone off and the kitchen light was smouldering badly. She'd been on the phone to the DNO (Northern Powergrid), they were telling her to turn the main switch off but she couldn't understand and...
  6. V

    sizing neutral on a split phase 180 deg

    Hi, looking at installing a sub main down to a field to supply caravan hook up points. the supplier has stated they are installing 2 x 100 amp split phase 180 degrees apart. not worked on 460v/480v split phase - my question is how do i go about sizing the neutral. i plan to run a steel wire...
  7. P

    3 phase supply cost

    Does anyone have an idea how much UKPN would charge for a 3 phase 100A supply. There is an overhead transformer less than 100m away from the property & the poles go right pass feeding the building next door.
  8. J

    Info about phase testing with a steinel combi checker

    Hello. Recently used a steinel combi checker 1.2 to test various electrical items. Im ok with the voltage, continuity and single phase testing. However, i am not sure as to what phase testing is supposed to shows. According to the steinal guide it says"To perform the phase test, contact the...
  9. A

    Help with 3 phase pump wiring to sprinkler controller.

    Question on wiring? Sprinkler controller to 3 phase Goulds water pump. Sprinkler controller: "open sprinkler" uses 5vdc for master pump start circuit Goulds irrigator GT153 480v Eton contractor with 24Vdc control circuit and over load. Relay for sprinkler controller master pump on/off control...
  10. P

    Can I power 2 x 3kw immersion heaters from a single 3 phase contactor?

    Is it ok/advisable/legal to power 2 immersion heaters (both in the same cylinder) from a single 3-phase contactor? I need to connec
  11. C

    3 phase USA 3/60/220 to UK 3 phase is it doable thanks

    Hi 3 phase USA 3/60/220 to UK 3phase is it doable thanks oh and how?
  12. R

    Operation of a three phase UPS

    So looking at a system that utilises a couple of sizable UPS unit to supply various equipment through a site. The UPS is static with 3 phase output, both units have an input switchboard and output switchboard with a castell interlock so that the bypass can not be switched in unless the UPs...
  13. M

    Basic question on Phase 3 / Phase 1

    Hi forum, I have what I am sure is a very basic question and would be very greatful if someone could point me in the right direction. I have next to no electrical knowledge so can assure if any re-wiring is involved I will be taking the appliance to an electrican. I have just received a...
  14. S

    Coffee machine wiring 3 phase on single phase circuit

    This coffee machine is three phase model number sm 105e It’s three phase with 3 brown cables one neutral and earth What is the cheapest way to wire it in? thanks
  15. Mark42

    32A single phase output from 3 x 16A three phase supply. Is there a way?

    I have a workshop in a remote location which I rent out. The incoming supply is 3 x 16A three phase on 180m of 16mm SWA. An upcoming customer has a machine which needs a 32A single phase supply. (Actual load about 25A.) The energy is there, but it's split across the three phases. Is there some...
  16. S

    4.8kw electrical combi oven/steamer 3 phase

    In a small restaurant theres a single phase supply just wondering what size converter i would need to convert 3 phase to single phase and what size mcb to install into the ccu thanks
  17. G

    Roller Door Feed 3 phase (RCD?)

    HI all, changing a board in a commercial warehouse and they need a 16amp feed to a new roller door, there is an armored there that will do it and I'm fitting a new shnieder board with RCBO's, am i best fitting a 3 phase MCB in the board or a RCD commando by the door? Cheers Grand
  18. D

    Calculate 3 Phase MCB size

    Hi..I should probably know this but don't do too much 3 Phase stuff!! Can anyone give the formula for working out the size of a 3 phase MCB? I have a 12kw 3 Phase fryer to install. Cheers
  19. D

    3 consumer units off one 3 phase meter.

    Evening..Just wondering if it's acceptable to run 3 separate consumer units off one 3 phase meter, I have seen 3 consumer units off 3 meters on a 3 phase supply many times but never off 1 meter? Cheers
  20. E

    3 phase boiler install on domestic property

    Hi all, A customer is looking into the option of upgrading to a 3 phase power supply in order to get a new electric boiler system installed. They currently have a single-phase supply. They have an out-building with an electric car charger. Would an option be to have say a 1 way 3 phase board...

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