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  1. R

    Single core and earth lighting fault

    Could the better and wiser assist with an odd one...? I've just finished a big CU swap on a 1950's house that uses single core & earth lighting circuits. All but one of these are fine, but the faulty one is pretty funky; There are 3 accessories on this circuit in 3 separate rooms. The first...
  2. robertl

    Single phase power all thats avaiable for new workshop build

    Hello Everyone, new to the forum and looking for some advice on a new workshop, i'll explain. I am planning on building a metal / woodworking workshop (mainly aluminium and stainless steel) for boat work, refurbishment and boat building. I am a marine engineer to trade and i am planning on...
  3. J

    9kW 3ph Immersion Type Heater run in Single Phase

    Hi, I received a 9kW 3ph heater from a friend from india, i was hoping to use this in steam production for a distillation project i am working at. I rewired it and made the 3 heating element in parallel connection. Now my problem is the 6 gauge wires i am using are always heating up, also some...
  4. D

    Two post carlift single to three phase

    Has anyone had any history of powering a three phase motor from a single phase supply? Is there a preferred/best way of doing this? i.e.single phase to three phase inverter/VVFD, convertor or using capacitors etc. Not my usual avenue, but I have had the question put to me, so I am trying to get...
  5. G

    Single phase circuit on 3 phase system calc

    Hi, I have a query about calculating current in a 3 phase system. So a 22kw load in 3 phase assuming a power factor of 0.8 would be 22000/(1.732x400x0.8) = 39.69A and say a 7.2kw load on a single phase supply would be 31.30A if you simply use ohms law. But what happens when you calculate the...
  6. S

    Sleeving 3 phase cable to single phase cable

    Could someone help me understand what is cable sleeving? Can we sleeve a 3 phase cable to single phase cable? Is this as per any regs? BS 7671? Could you send me some pictures of the same if you have..
  7. P

    Single ph to 3 ph Ramp conversion.

    I am about to link an inverter to a ramp I bought from a 240/230v supply. In the control box which was wired for 415v , the transformer within has 400v 24v on a label can this be operated at a lower voltage to produce the same 24v system. I will post a pic if I can.
  8. B

    All three neutral wires needed for a smart single gang light switch?

    Hi all, I'm wiring one of those smart switches which is a single gang and I have three live wires (x2 com) (x1 L1) and three neutral wires that are currently in a block. The original switch just use live (com and L1). I've wired up the new switch with the live wires but I am trying to attach...
  9. C

    Thermal overload 3 phase to single phase pump

    Boiler panel controlling a 3 phase grundfos pump. Pump was tripping thermal overload... Pump replaced for a single phase grundfos by engineer etc... I was asked to convert the control circuit to single phase which I did. But still tripping on the thermal overload. Set it slightly higher for...
  10. B

    Wiring in of a Bosch single oven rate at 2,990w

    Good afternoon all I am a new to this forum and just wanted to say Hi. I am not a electrician but a retired builder of some 6 years and still doing the odd job for friends and family . I require some help with an issue I've come across in my daughters kitchen. I'm replacing her double oven...
  11. C

    3 phase supply to single phases only 2 phases used

    I went to some holiday cottages today, the main supply in was 3 phase however only 2 of the phases were used. The L1, L2 and Neutral cables were wired into a three phase meter, then coming out was L1 and Neutral, L2 and Neutral to create two single phase supplies which were divided off using...
  12. S

    How to connect a single zone manifold into a multi-manifold system

    Hi Guys, I have a multi-manifold underfloor heating system. The multi-zone manifolds all operate nicely turning things on and off as appropriate according to the main timer and the zone thermostats. The single zone doesn't listen to the thermostat and only obeys the central timer (ie on or...
  13. S

    Single Phase Motor Reversing Direction

    Good evening you sparky lot I'm after some wiring advice on an old single phase motor for use on a lathe. Please see the attached pics. The tails have been removed for clarity. Live was connected to terminal B, neutral to AZ. Is it possible to reverse the direction of this type of motor...
  14. J

    Need some advice ! can I spur off a kitchen single socket that is coming off a fuse spur ?

    A friend has added a socket off the back of a single socket that is coming off a fuse spur in the kitchen will this be ok ? Thanks for the help
  15. Colin McLachlan

    New single light circuit tripping RCCB on socket circuit.

    I'm not an electrician, but have been successfully doing DIY electrical work for 50 years, including complete house rewiring before the days of RCCBs. I've just moved to a house built in 2000, and one cupboard (ironically the one with the consumer unit in it) does not have a light. I installed...
  16. S

    Advice on Wiring 2 Single Ovens

    Hi guys, I'm about to fit a new kitchen and I have ordered two single ovens which are Bosch. They are rated at 2.99KW. They are both going in a standard oven housing unit, one above the other. They need to be hard wired, the cable comes with the oven/s. Both are rated 13A. At present the...
  17. I

    No earth in single pvc pvc neutral

    I've been working in Birmingham for a couple of weeks and I am coming across a single neutral cable from the cu to each light point then the line is also a single cable with a earth to each switch then to the lights it must be from the 60s .It does seem to be the norm . My problem is that...
  18. SJD

    Single to three phase converter

    One of my customers has a single phase to three phase converter, to power a 3-phase pump. The converter is a rotary type, quite noisy, and recently has been prone to breaking down (three times so far this year). So they are looking for a static or "digital" converter replacement, 230V to 400V...
  19. P

    Single phase appliance from a 32a 5 pin trailing socket

    Hi all What are the thoughts on fitting a male 5 pin plug to a single phase appliance then connecting it to a 5 pin three phase socket. Obviously only using one phase. Rough but as a temporary measure is it against the regulations? Found these distribution boxes which appear to do similar...
  20. M

    Electric roller shutters - 2 new switches don’t work the single shutters from 2 switches.

    In my house in Spain, I have just replaced 2 switches that controlled a single motorised shutter (the pair of switches in photos - NB, shutters are the middle of the cluster, other 2 being, 2-pin socket and a light switch) on a bed headboard that controlled a motorised window shutter. The...

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