effect

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  1. HappyHippyDad

    Voltage drop and it's effect?

    Hello all, just been thinking over Voltage drop!! 1. Where does the 3% and 5% figures for voltage drop (VD) come from? Appendix 4 (BS7671) gives the figures but why the different values between lights and sockets? 2. Also permitted voltage levels are -6% and +10% from 230V giving a min of 216V...
  2. Dan

    14 day cooling-off period is now in effect for selling in homes

    In case you missed it change to the rules came in on 13th June 2014 - completely replacing the Cancellation of Contracts made in Consumers' Homes or Place of Work Regs 2008 - that required 7 days notice and we had to give the customer a special bit of paper with the details of their rights on...
  3. M

    Electricity NW about to vary the supply voltage - what effect on PV?

    http://www.enwl.co.uk/docs/default-source/class-documents/trial-substation-selection-methodology.pdf?sfvrsn=6 Caught the interview on You & Yours on Radio 4 today - ENW are to start to vary the supply voltage through the network at peak demand times in an experiment to try and prevent power...
  4. T

    Effect of Lightning Strikes on a Building

    Good evening guys, I have just had a call to go and have a look at a hotel tomorrow that was hit by lightning yesterday morning. All i know is that its a 2 story building and was hit and now has a hole in the roof and that there is no lightning protection system in place. They are worried that...
    • Tim
    • Thread
    • building check damaged effect insurance lightning
    • Replies: 41
    • Forum: UK Electrical Forum
  5. the pict

    drill batteries

    Any one heard of the way to rejuvenate Nicad batteries or is it just stories P
  6. S

    Electric effect log burner. Hiding cable ?

    Customer purchased lovely electric effect log burner which i now have to fit. Cuurent fireplace inset all ready. Solid floor with flag slabs laid in and nice brick effect cladding all over inset with lovely finished pointing. Problem is no cable in place or socket close by for the fire. Have...
  7. P

    Wha would the effect of incorrect phase sequence to the 5kw machine in a workshop be

    hi guys, What would the effect of incorrect phase sequence to the 5kw machine in a workshop be? thanks magpie
  8. Richard Burns

    Hall Effect sensor

    I am having problems with a home built magnetic water level sensor using a reed switch, whereby the reed keeps sticking or failing to operate and I was thinking of using a hall effect sensor and a power transistor but I am unsure of the characteristics of hall effect sensors. Are they...
  9. R

    Pulse Width Modulation, does it effect cost of running an electrical product.

    If I use a Pulse Width Modulator on say a fan, will it reduce the cost of running it, if it is slowed down? Not something I'm planning on doing, just wondering!
    • Rampage
    • Thread
    • cost effect electric electrical electricians' talk product pulse running width
    • Replies: 2
    • Forum: UK Electrical Forum
  10. V

    The photovoltaic effect

    Question ….sorry could not able to find thread on this one. If my system is left off AC and DC is turned off what’s happen to all that electricity generated from the panels? Panels must be still producing something even they not connected to the inverter. Reaction inside the panels photons of...
  11. S

    Client wants one more panel. Effect his FIT rate?

    We installed 16x 235 schot panels during the rush at the end of last year. Now the client would like one more 235w panel which would bring him in just under 4kWp (3995w). The inverter is 3.6 PVi and will take one more panel on one of the two strings. But i'm not sure where he stands with his...
  12. P

    shaded panels weird effect.

    In the cold mornings as the sun rises, there is condensation on my panels. I noticed a weird effect on my shaded panel and took a pic. Is this as expected?
  13. D

    Largest Solar Activity today in years !!!

    Anyone notice any increase in power generation leading up to today, other than they would expect for this time of year ?? I assume this would be sensed by Solar panels ??? BBC News - Fears of disruption as solar storm strikes the Earth
  14. M

    Out of interest. effect of East/West split on one string?

    I wouldn't do it but a client asked about an east/west split on one string. I couldn't quite describe how bad the effect would be? Would the 8 on the east side(shaded eg.) drag the current down from the 8 on the west (sun shining on)? Or any other answers? Much appreciated
  15. K

    BESNA effect on apprentice pay ?

    Hi everyone, First off sorry if this is in the wrong area but didnt know where to ask. I work for Crown House Technologies (Laing O'rourke) as an apprentice, quick question about pay that has bin playing on my mind. At the moment I am paid the JIB apprentice rates , and am at the level 1 so...
  16. E

    Shading does effect performance

    Here is an interesting one re shading. A 30KWP system that we were installing went live today, sun was shinning evenly across the barn roof. The system is split into eight strings, then 4 strings to each inverter. The whole system had rigorous testing before "switch on" and all tested perfect...
  17. silver surfer

    Voltage optimisation

    A client of ours are having an 800kva optimiser installed presently. So its got me thinking, as being as its basically another transformer (dare i say an isolating transformer? although i stand to be corrected!), will this effect the existing Zs values throughtout the installation? Rather like...
  18. B

    PV roof brackets on interlocking slate effect tiles

    Hi all, I surveyed a property today for a PV install and the tiles are slate looking interlocking tiles. They are as thin as slate, and all nailed down. I do not want to use anchor bolts due to the weatherproofing problems. Just wondered if anyone has fitted a system to a roof like this and...
  19. M

    Wood effect grid plate

    hi all, anyone out there know where i can get a oak wood finish grid plate? thanks
  20. S

    Volt drop effect on appliances

    Hi Guys I have a question regarding volt drop. Some time ago a company I worked for installed wall mounted aircon units around their workshop. They wired them into an existing 2.5mm ring main circuit which was in singles in a truncking. During operation some of the units would cause the...
    • Surefire
    • Thread
    • appliances aus cause current effect electricians' talk resistance units volt volt drop volts
    • Replies: 7
    • Forum: Australia
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