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  1. L

    Zs of circuit higher than maximum values allowed?

    Hi there, I have a ring circuit where the Zs reading taken is higher than maximum allowed values. the circuit is protected by a 32a RCBO type C device, Zs = 1.43. I have currently have tightened terminations which has brought it to its current value. as i have been out of the game for a while...
  2. T

    Lower r2 end to end reading than r1 & rn

    Hi peeps. Doing an end to end test on a ring final circuit. R1- 0.43 RN- 0.44 R2- 0.33 Its old stranded 2.5, seems to have about 7 stands on the live n neutral conductors, and about 4 strands on the cpc conductor. Why is the r2 lower than the r1 & rn!! HELP
  3. J

    d type breakers needing a low zs

    im a 1st year apprentice thats why im asking this question, from what ive gathered the higher the current it takes to trip as in 10 times the rated current etc... for that you need a lower zs than if it was a b type why is that? my thoughts on it is that becuase you have a higher current so...
    • Jake1579
    • Thread
    • breaker breakers circuit current higher lower times type
    • Replies: 3
    • Forum: UK Electrical Forum
  4. G

    Recycle Asymmectrical Time Switch

    I'm working on a job where I need to make a pump switch ON for 15 seconds then OFF for 45 seconds then repeat ON for 15 seconds and OFF for 45 seconds etc...At the moment the pump is switched on by a contactor that is permanently energised while ever the plant is operational. Can anyone...
  5. C

    Lower energy generation from all black panels?

    Afternoon. I have potential customer questioning whether all black panels will perform as well as panels with a white backing on the basis that they will become hotter more quickly affecting energy generation on warm sunny days. I can understand the logic but have never seen hard evidence to...
  6. S

    Zs lower than Ze????

    Hi, I am testing my dads house to get a bit of practice and I dont understand the readings? Its a TT with an Ra of 39ohms, yet when I use the MFT to do a Zs on the sockets I get anywhere from 0.21 - 1.09ohms. I dont understand how this can be lower than the Ra, I must be doing something wrong...
  7. B

    ow could i lower the power to this unit to make the motor go slower

    Hello, i need some help. I have this record lathe (below) and it operates like a normal record player but just that it cuts them (records). This units motor runs at 78rpm which is a bit to fast for making records now as at 78rpm i can only cut 3 minutes of music. I want to be able to slow the...
    • beatles2011
    • Thread
    • lower motor power unit
    • Replies: 21
    • Forum: UK Electrical Forum
  8. B

    How could i lower the power to this unit to make the motor go slower

    Hello, i need some help. I have this record lathe (below) and it operates like a normal record player but just that it cuts them (records). This units motor runs at 78rpm which is a bit to fast for making records now as at 78rpm i can only cut 3 minutes of music. I want to be able to slow the...
  9. R

    Distribution board height when replacing original ?

    Replacing a dis board at a house its 6ft up inside a cupboard . What height does this have to be for the new board ? Do i have to lower it for part M ? I`m using this for one of my assessment jobs so i want it to be right All answers appreciated ( even the smug ones )
    • romps
    • Thread
    • attach board distribution distribution board extend height lower original replacing
    • Replies: 21
    • Forum: UK Electrical Forum
  10. F

    Fault current

    Can someone explain why fault current is higher when your zs is lower trying to write down reason but struggling on what to put
  11. J

    Novice needs advice: Using a lower wattage voltage converter

    I think I have received some bad advice from electricians and want to ask here. I was ignorant and did not consider the specs of a Vitamix kitchen blender before plugging it into a 300-watt voltage converter. However, both the blender and the converter worked fine for many events and continue to...
    • jimmyh
    • Thread
    • advice converter lower needs novice since using voltage volts wattage
    • Replies: 1
    • Forum: UK Electrical Forum
  12. grumpyjohn01

    TT network

    Have recently been on an industrial job where a 3 phase 200A supply is distributed as a TT network between DB's in 1 large building and subbed out to others via 5 core cables, ie The cpc is continuous throughout.There are stakes at the origin and at all db's outside the eq zone.There is an S...
  13. N

    r1 r2 through conduit

    Hi guys, as the title suggest how do u test the R1 R2 value or R2 continuity if the sockets are earthed via the metal conduit? Thanks guys
  14. Amp David

    Voltage Optimiastion units

    Hello All anyone out there got into this home voltage optimisation ? with any regular business It all seems very good - quite expensive - very hard to sell, or am i missing something I have fitted a few by request (not fitting vpahse unless paid lots of money) Voltis home is a nice easy one.
  15. S

    Multi-installation FiT Rate

    The Phase 2A consultantion is not clear on the multi rate, i.e. above 25 installations. Does anyone know whether you would receive the higher rate for installations 1 to 25 (i.e. those registered first) and then the reduced rate for those instalations 26 onwards OR the lower rate for all of...
  16. S

    Uses of solar energy

    Solar energy, glowing, heat & light, room the sun has been connected by humans since ancient times using a range of ever-evolving technologies. Solar energy technologies can support solar heating, solar photovoltaic, solar thermal electricity and solar architecture, which can make large...
  17. SolarCity

    Renusol Intersole on plain clay tiled roof

    Has anyone installed a Renusol Intersole system on a plain clay tiled roof? I can't see any reason why it shouldn't be ok, but it's just that every example I've ever seen of it shows it installed on thicker pan tiles. Presumably it would be ok but would sit a little higher than normal?
  18. I

    interconections/bridges on ring circuits

    hi after a little advice re testing to find an interconnection or bridge on a ring circuit, Now a bridge is really a series of spurs that has eventually been reconnected to the ring.the resistance readings at these points (sockets) would be higher than at other points in the ring would this be...
  19. S

    Thin-film panels, anyone using them?

    Before crystalline panels had started dropping in price there used to be a lot of interest in thin-film... Usually lower efficiency (which doesn't actually matter if you have space) but also lower price than crystalline... Just curious whether any of you use thin-film panels and whether you...
  20. G

    Wake Fronius IG TL Inverter to check software version?

    Has anybody updated the firmware on a Fronius IG TL inverter via USB? I've read a Fronius PDF guide that states if the software version of the 'Display Software' is lower than SW V1.1.1.0 and the software version of the 'Power Stage Software' is lower than SW V1.1.0.0 then an update is...

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