phase | Page 9

phase

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  1. J

    New home. Is it 3 phase?

    Hi, just moved in, and I find this, and haven’t seen anything like it before. Is this 3 phase? any concerns at all? There is a heated pool outside. Could be needed for the pool heater. 1st post, and I thought I’d seek some guidance on here. Many thanks for replies.
  2. R

    Can a difference in phase voltages cause a motor to fail?

    Here is the background: A new Grundfos 3 phase sump pump was installed in a bore hole to pump groundwater to a holding tank. After 6 weeks the motor failed, the installer measured the voltage of the 3 phases which at the time were P1-237v P2-250v P3-233v and suggested this was the likely cause...
  3. M

    Can a 3 phase motor that is running on single phase have 2 directions?

    I am needing to know if this wiring diagram is showing a few things: 1: Does this show a 3 phase to single phase conversion? 2: Does this show that the motor can turn in 2 directions with the same internal wiring if you toggle the SPDT switch?
  4. D

    6mm 3 phase 20mm conduit

    What's everyone's thoughts on 4 conductors 3 phase 415v at 6mm running 3.5mt in 20mm conduit domestic use. 9
  5. D

    3 Phase Install

    Hi All, Happy new year to you all! I’m working for an engineering company, been here for a few years. im currently working towards my NVQ level 3 in electrical maintenance and I’m in the middle of supplying a 100A Distribution board from a newly upgraded main 250A board. When the new board was...
  6. T

    3 phase cable calcs

    After my last post and having and having to re-learn some stuff can someone check and advise on a few things. Sorry if this is wrong don't hate, will make a good learning exercise as my mentor won't help me and hopefully will help others. Specification 16 circuits- wired up to caravan hookup...
  7. T

    Cable calcs 3 phase

    Its been long since I was in college doing cable calcs and obeing onsite as I've studied a completely different course at university, I understand de-rating factors but need some clarifying up to brush up. If I need a 600A supply which can be split 200A each phase. and being supplied via SWA...
  8. James

    Reported content: Post in thread 'Domestic - 4 or 5 pin plugs for 3 phase supply from inverter?'

    Post in thread 'Domestic - 4 or 5 pin plugs for 3 phase supply from inverter?' by pgrbff has been reported by James. Reason given: Content being reported:
  9. P

    4 or 5 pin plugs for 3 phase supply from inverter?

    I have recently bought a 3 phase bandsaw for hobby use and acquired a single phase to 3 phase inverter to power it. When I looked at buying cable and plugs/sockets for the supply I didn't know if I should choose 3P + earth or 3P N + earth plugs and sockets. What is the difference and which...
  10. J

    NICEIC Certification Scheme Advice please - Certification for competance in basic single phase installation

    Hi all. I am looking for some advice. I am looking to become certified to install consumption measuring devices in small businesses. I have many years of expereince on basic single phase supplies includiing consumer units etc, assisting my father's company when he's snowed under but never...
  11. T

    Bare 50Hz AC 3 Phase Bus bars...what is safe voltage to use

    Hi Hi, We will have isolated three phase bus bars. Fully Mains transformer isolated. (mains input is 240VAC phase to...
  12. R

    Fitting a single phase Matt:e for car charger

    Evening all, Just After some knowledge about the Matt:e. I have been to a job where a 13 amp Rolec car charger point has been fitted On an external garage wall which is attached to the house. I can see no evidence of an earth rod and I am assuming it is still connectEd to a pme earthing...
  13. J

    How can you tell if two of your sockets are on the same phase?

    I’m planning on buying a powerline adaptor for one of the upstairs bedrooms. This is to allow for a stronger internet access from this room as the WiFi signal is almost completely blocked by an external wall due to it being an extension. My Wifi router is downstairs in my living room and I’ve...
  14. G

    Convert to UK recognised electrical qualification

    Newly relocated from South Africa. Full 3 phase trade tested with a complete wiremans licence. Looking to get converted to a UK recognised equivalent.
  15. O

    3 phase ring main in a tool room. X6 16A sockets

    Hi, I have been tasked with installing 3 phase ring main in a tool room. X6 16A sockets. Each pice if kit will pull no more than 5A. Planning on using 4mm SWA cable protected by a 63A breaker. Tool room dimensions are 7M X 5M. Any problems with this?
  16. E

    How easy is it to convert a house from single to three phase ?

    I am thinking of having a car lift (that uses three phase supply) installed in my house, my house is single phase, what are my options?, what would be involved?
  17. Vortigern

    Bit of a mystery to me, any ideas? Fault on three phase Merlin Gerin

    Outage of main three phase primary switch box for one of three buildings on commercial site. The building houses around 30 commercial units. Switched back on the main switch, power restored. Except for one unit. All units supplied through the secondary sub switch box. Large MCCB MEM type. Three...
  18. P

    What do I need to know to calculate size of single phase motor?

    About 20 years ago I bought an old table saw from a local school. I only had single phase at the time so I changed the motor and switchgear as it was 450V. I'm thinking of buying a 3 phase 50s bandsaw and have the same problem, but I can't remember how to work out the size of the replacement...
  19. HappyHippyDad

    Is this single phase as well as 3 phase and what is it's power rating?

    Evening all.. A friend/customer has just asked if I could connect up this commercial washing machine down at his domestic stables. He has had it in his house for 10 years. Recently it has started tripping the B40 MCB. It does not trip immediately so I don't think it is the inrush, plus it did...
  20. lloydy304

    3 Phase 4 wire

    Hi, quick question about 3 phase 4 wire systems. If I was wiring a single TP+N board all circuits running 230v very and well balanced and had a max load of 234A / 3 = 78A per phase. So removing all correction factors and sizing the connection tails a wire size of 16mm br/bl/gr/bl should be...

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