phases

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  1. S

    3 phase EV Charger on 2 phases.

    Hi all, I have a site where the network cable was damaged do DNO has provided 3no. 100 Amp Fuses. 1 Fuse on L1, 2 Fuses on L2. L3 is damaged in the road and not in service. I have looked at onboard charger diagrams of several vehicles. As far as I can make out the "3-phase" capable vehicles have...
  2. bugraekuklu

    Switching between phases depending on live health

    Hello, I'm pretty new to the forum. Hopefully, this is the best place to post it somehow. Currently, I have a setup of a distribution box, which is able to supply 63A three-phase load to an EV charger, running two-phase load of 16A. It demands 3.7kW from each phase, making it a 7.4kW charger...
  3. N

    Can we connect the 2 phases lines ( 110 V each ) to RCD breaker?

    Can we connect the 2 phases lines (110 V each) to RCD breaker? please advise ?
  4. P

    office sockets different phases

    Hello All done an EICR on a small office around 5 years old someone has added extra socket circuits from new to suit layout. they have added extra sockets on different phases next to each other less than 100mm between them so 2 phases powering same desks. Im possibly over thinking it but is...
  5. arifpatelpduk

    UK Arif Patel Preston Dubai| Is wattage rating of a VFD split between 3 phases?

    Hello friends Myself Arif Patel and I am an Electrical engineer from Dubai. preston, UK.. I just wanted to Know, I've been asked to complete an electrical load list with the watts required for each phase of a 3Ph, 400A, 11kW VFD. The VFD is feeding two motors with a total load of 21A. How many...
  6. Lucien Nunes

    How many phases? And another Lucien grumble: 'Amps Per Phase'

    When I joined this forum a decade or so back, there was a discussion going on about a welder that was connected with a 3-core cable to L1, L2 and earth of a 3-phase supply, operating on the 400V present between L1 and L2. The advantage of choosing 400V is the reduced current requirement. My own...
  7. Confusedsoconfused

    Converting into 12 flats, KVA, phases etc. Help!

    Hello, I'm new to this forum, we are in the process of converting into 12 flats all electric, no gas incl. heating, showers etc. An electrician was hired to apply to the National Grid on our behalf for a three-phase connection. He then quoted us £1,800 plus VAT for civil works i.e. to dig...
  8. M

    Hey guys, what does for example 300A rating on a 3 pole MCB means?

    Hey guys, what does for example 300A rating on a 3 pole MCB means? Does it mean each phase carries 300A i.e. (Current in R=300A, Y=300A, B=300A) or it represents total currents in all the 3 phases i.e.(Current in R+Y+B=300A)? Please assist, it is confusing me a lot with my calculations of...
  9. C

    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...
  10. S

    Powering single phase motor from 3 phases

    Hi, this might be an easy question, but i need to power a single phase motor situated about 300 meters away from my MCC. Do I just run 3 phases 415VAC cable to the motor in the field and just connect one live phase and the neutral to get the 240VAC? if that's the case then what do I need to do...
  11. U

    Heating Diagram for two boilers on two different phases.

    Hi Everyone ,i need a advise please:basicaly i got two system boiler with one imersion heather ,they must be combinet in one way.If in any reasone boiler number one lost power ,boiler two supposed start working ,two boiler on different phases . please if any one had simillar situations ,any...
  12. J

    2 out of 3 phases installed the wrong way round!

    Hello. I hope someone can help. I've just discovered that on a new build house built just over a year ago there is a problem with the wiring from the incoming mains fuses to the consumer unit. Phase 1 was wired correctly. But the cable from Phase 2 on the main fuse is connected to Phase 3 on the...
  13. J

    UK WHY? - When connecting 2 phases in 3p, we get 400v

    When we use 1 phase, L1 or L2 or L3 - we get 240V When we use 2 phases, L1 & L2, or L1 & L3, or L2 & L3 - we get 400v. When we use 3 phases, L1 & L2 & L3 - we get 240v?
  14. mattg4321

    A storage heater on 2 phases.

    Just looked at a job and the storage heater has a peak and off peak supply to it. These are on different phases. There is a label on it to warn of this. Not something I’ve seen before though and feels wrong but probably almost inevitable in commercial buildings with storage heaters. Thoughts.
  15. timhoward

    13A sockets different phases

    Hi On Friday I found 2 x 13A double sockets about 30 cm apart in an office. One of them was on same circuit as all other sockets in same room. The 2nd one had been added, and drilled through from the adjacent office. The circuits are on different phases. Common sense dictates that a 400v...
  16. M

    Convert 3 phase into 3 single phases

    Hi there, I have currently started working on a farm and they are having a new 100a 3 phase supply installed. This is being terminated in an external enclosure. They then want to carry this 3 phase 150 meters to a barn and at this point split it into 3 single phase supplies. Is this even...
  17. L

    There is a one circuit (one voltage source), two phases and

    Hello Electricians, This is my first post and I'm glad to be one of this forum member. However, to clarify my question. I've a "Skin Effect Heating System", fed by 1240 V. The circuit is quit simple, Phase U, Neutral in the middle and Phase V. Phase U and Neutral feeding the heating cable#1...
  18. Mark42

    What colour panel lamps to indicate phases?

    I’m making breakout (‘Distro’) boxes to distribute power from three phase sockets in my workshop to clients’ temporarily-installed single phase equipment. My question, given that I want to have pilot lights on the boxes to both confirm supply and to indicate from across the room which sockets...
  19. D

    Single phase board use with 2 phases

    Hello guys new in this forum. In my 19 years as an electrician I've never seen this. Looking for any thoughts on this. Been asked to install a few new circuits In a domestic garage. There is a granny annex on top of this garage also. Supply is 3 phase in to a 3 phase isolator. From there...
  20. Mark42

    Timer and local thermostat control of 3 x heaters on 3 phases. Wiring logic help please!

    I'm fitting oil-filled panel heating into two rooms of a remote workshop, with (currently) a 20A x three phase supply. Control, for occasional use only, is needed as follows: 1. A wall-mounted and easily-adjustable mechanical timer to set all the heating to come on an hour or two before people...
    • Mark42
    • Thread
    • control heaters help help please local logic phases please thermostat timer wiring
    • Replies: 24
    • Forum: UK Electrical Forum
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