three

  1. A

    Australia Three phase cable to wire single phase

    Can I use three phase cable to wire single phase
  2. J

    UK Three phase dust extraction auto start

    Hello, I am currently working with 2 separate circuits, one for the dust extraction and another for a circular saw. Both circuits have an isolator with 3 phase and neutral then each goes off to its own dol starter. I was wondering if there is a way to make them both turn on at the same time...
  3. J

    Single or three phase? Whats popped?

    (Thought I'd already poost this Q, but I cant see it, so I'll try again) We have some work going on in one of our buildings atm. On of the chaps has drilled into a cable that was buried in a wall in a fairly random location, knocking out the power to one of the flats (and giving him a nasty...
  4. GeoffatMM

    Three Phase Cable Sizing

    I am an enthusiastic retired engineer rebuilding a barn in France from scratch and am having problems sizing my incoming electrical cables. I have had answers from 4mm to 50mm cross section from various pages on the internet so you can understand I am a bit confused. There are two main cables...
  5. E

    Three Way Switch Troubles

    Hello - Looking for assistance regarding a problem with my three way switch what was working over the past four months with no problems until this week. I went to turn on one of the three way light switches and nothing happened. I went to the other three way switch on the circuit and noticed...
  6. M

    Help connecting three way switches

    There is two hot wires one in each box. What is the proper way to connect the four wires to the switch In each box?
  7. N

    USA Tap existing switch to power three new switches

    Hello, We have three bedrooms without lights in their closets and we'd like to add a single light to each. There is an existing 20 Amp circuit that is currently only powering 4 recessed lights and a vanity light. The 4 can lights are connected to a switch in one of the bedrooms. Can I tap into...
  8. Khanzada

    Load calculations on three phase board

    Costumer have 12 flats and need to feed for each flat a prepaid meter and consumer unit within the flat , the main supply to building is three phase , my question is how to distribute the load for 12 flats, each flat have a load of 63A. Main supply is three phase .
  9. P

    Three Batteries have Died in 11 Months Alternator Appears OK.

    Vhicle: Fiat Grande Punto 1.2 Petrol. 24/9/2021 The original battery died and was replaced: I'll put that down to old age. It was replaced with a Lion brand 40 AH that I was later told was not the recommeded battery for the vehicle. A month later the Alternator Sized Up and was replaced...
  10. Peter55

    Earthing question - three phase into main building, then single phase to EV charger

    Hi there, new to the forum and in final stages of completing C&G level 3; need to complete design project to complete. Am struggling to get my head around how to draw up correct circuit diagram showing EF Loop path for EV charger where initial supply is described as 'three phase TNCS' feeding to...
  11. M

    Three 2.5 t&e feeding a socket and a fused spur

    I'm revamping the kitchen electrics, 1980's property. Majority of the sockets have a couple of cables going in/out of them, with the only exceptions being a couple of sockets tee'd off fused spurs and fed by single cables. However, I'm perplexed by one area. By the side of the gas hob there was...
  12. G

    How do I add a subpanel using three 20 amp breakers with 12AWG from the main panel

    Current Situation: I have three 20amp breakers with 12 AWG in the main panel. Each wire ends in a 3x2.5” metal box along with one neutral wire. There are two yellow wires, a black wire and a white wire. One yellow wire is attached to a 240V outlet and the other is attached to an orange wire...
  13. W

    CT8775C Thermostat three wire heat only (jumper intact)

    Which terminal is used for ground to verify power supply? Thank you
  14. D

    USA I need some help! ASAP, questions a put wire, three ways and stoves.

    This is the digram that i came up with, i am running mostly 12-2, on 20amp for everything. Except for my electric stove, i was planning 6 gauge wire on a 50a. i am trying to wire in two three ways light switches, and was going to run 12-3 between them and 12-2 to the lights and the service...
  15. A

    UK How to wire three LED to main with one cable?

    Hi all, I am new in this forum and would like to understand how to wire to the main supply x3 of the equipment that I attached as a picture? I had a normal light and wish to have three of those leds instead. Is it possible and if so how should I wire it? Many thanks in advance. Adrianna
  16. Diocm7

    Two eletric meters and three readings.

    Hi there I recently moved to a new flat and it have two different eletric meters. The first one is a regular one and the second one is one for the economy 7 tariff I think sibce it have meters for low and normal. Wouldn't only the second be enough? I attached the photo. Thanks for the help
  17. Law852

    Help installing light to a box with three sets of wires

    So I removed a light without having taken a photo of the set up before and now I'm having a problem reconnecting the light. There are two light switches controlling three lights. There is one switch (switch A) that controls the light coming from the box in question (light A) and a second light...
  18. D

    Three Phase Power supply

    Greetings I work for a client who has recently negotiated a bigger supply from the supply authority, the client has agreed with Scottish power to have a larger transformer and feeder cable installed, my part of the works is to upgrade the existing switchgear to accomodate for the new supply...
  19. BiddeldyBwah

    32a three phase isolator neutral bar?

    Came across one of these today at work. Had L1 L2 L3 and switched Neutral, but also had an N link bar inside. Just wondering what it's for?
  20. E

    Winding resistance tolerances in three phase motors

    Hi guys, Is there a standard tolerance percentage that should be followed when checking the winding resistance of each coil on a three phase electrical motor? The general rule of thumb I followed when measuring winding resistance was that each phase winding had to be identical or close to...

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