higher

  1. L

    Nest Pro Installer

    Morning everyone, just wondering if anyone has any experience with being a Nest Pro Installer and what is involved in getting set up and if it was worthwhile, many thanks.
  2. B

    Tungar battery charger

    Saw this on ebay VINTAGE BATTERY CHARGER | eBay - http://www.ebay.co.uk/itm/142209979231?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT Did a bit of research on the net seems it has a mercury rectifier in it. Built in the 1920s. Anyone remember seeing one before? only thing I...
  3. J

    Alphatek tek837 clamp meter

    I've just got the Alphatek Tek837 clamp meter as it seemed a good price compared to others with the same features, does anyone have any experience with this meter, since i ordered it i've learnt it's been sold under different brand names, Metrel tek837, Alphatek tek837, Di log DL6404 and...
  4. M

    Help with sourcing replacement power adapters

    Hey guys I'm new to this forum and looking for some advice from all you guys who know your stuff when it comes to everything electrical. I'm a creative filmmaker so naturally not clued up on adapters and things but I have LED lighting panels we use to light scenes and interviews and things and...
    • Martin Cambridge
    • Thread
    • attach help higher output power replacement
    • Replies: 5
    • Forum: UK Electrical Forum
  5. Pat H

    Upgrading supplier fuse

    Got a job with a 60amp supplier head fuse. Contacted Eon re upgrading to 80amp or 100amp. Their reply is they don't do that I need a qualified electrician!
  6. 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...
  7. N

    Guidance needed on moving sockets higher up

    Hi I moved to a new detached house which is ~90 yrs old. It has RCB switchboard outside (Kitchen, lights, smokealaram) but I am not sure when the house was re-wired last. My problem is that I need to lay a new floor. However the current sockets, sits just above the old skirting board which is...
    • newhousehelp
    • Thread
    • floor guidance higher moving needed skirting socket sockets wired
    • Replies: 3
    • Forum: DIY Electrical Advice
  8. G

    Earth fault loop impedance

    How does earth fault loop impedance and disconnect time requirements change for 3phase 3 wire 230 volt systems where the phase to earth voltage is 133 volts instead of 230 volts?
  9. 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
  10. P

    Full Calculation of Perspective Fault Current - PFC

    I seem not to have access to the professional forums so I post this here: I understand ohm's law and to get a current you use Volts/Resistance (V/R); so if it's Perspective Fault Current (PFC), it's V/R or Volts/Ze; and we divided by 1000 to convert to kA. Yes? Is there a difference when...
    • puffy
    • Thread
    • calculation current difference fault fault current higher pfc volts
    • Replies: 2
    • Forum: UK Electrical Forum
  11. A

    Can towel radiator be upgraded just by switching element?

    A client has a Dimplex TRS120 oil-filled 120W electrical towel rail. The element has packed up and before it's replaced I wanted to check whether the 120W element could simply be replaced with a higher wattage one, e.g. 175W (TR8404), as listed in the Dimplex spares brochure, a couple of lines...
    • adown
    • Thread
    • dimplex element higher radiator replaced switch switching towel
    • Replies: 2
    • Forum: UK Electrical Forum
  12. R

    Ze result on a TN-S strangely higher than normal.

    Attended a 1st floor flat in a council block today and found a supply head inside a mantel cabinet where the earth was connected around the outside of a conduit housing the main supply cables before going into the cutout. Also coming out of the bottom of the cutout was another 6mm2 earth which...
  13. D

    RCDs raising zs values

    Was at a property toady which I've done previous work before including fuseboard change. All i did today was change a few socket plates over for new ones. Took some Zs readings and noticed they were very near the limit of being acceptable ie: 0.92, 0.98 etc. Took a Ze at the board with main...
  14. L

    ZS measured higher than zs calculation

    I was wondering if anyone can help me out with this conundrum. I was testing a domestic property and tested a security alarm which was a 6A MCB not supplied by any RCD. Ze was 0.12 Ohms R1+R2 was 0.10 Ohms Now using the calculation I assumed the reading would be no greater than 0.22 Ohms...
  15. J

    Will a reading higher than given in 7671 for Zs values be okay if protected by RCD

    I might be COMPLETELY wrong.... but I have recently finished my level 3 in college and I'm sure I was told that if a Zs value is higher than the max reading in BS7671 it's okay if it's protected by a 30mA RCD, so it passes. I sort of remember writing 'satisfactory' on the test form next to Zs...
  16. J

    Higher PV DC Output voltage

    Just been advised by a customer he had been told a higher DC output voltage (HJ Solar 250w) was better when shading was an issue. Is this correct ?
  17. W

    Caravan Earthing, Higher impedance?

    So I have a static caravan that has a hookup to the house, And I wanted to improve the earthing by installing one specifically just for the caravan, So I have driven in around 4ft of copper pipe and used 30a capble to earth both the chassis of the caravan and the metal exterior, but upon...
    • whitenight639
    • Thread
    • caravan earthing electricians vans higher impedance van vehicle
    • Replies: 33
    • Forum: UK Electrical Forum
  18. J

    Rcd x5 higher than x1 reading

    Hi all, just filling out some paperwork from an inspection a couple of weeks ago and just noticed that a x5 reading is 76.4 and x1 is 28.4-not sure if I've misplaced a decimal point or what.. Going to go back and recheck it tomorrow- how can x5 be higher?
  19. P

    Higher current RCD required?

    Hi, I am upgrading one of the electric showers in my house from 8.5kW to 10.8kW and I want to check weather a higher rated RCD should be installed. I currently have 2x 8.5kW showers, both connected with 10mm^2 cable and 40A MCB's and a single 80A/30mA Contactum RCD (B8003/2) in my Contactum...
    • philjwb
    • Thread
    • current electricians' talk higher power rcd required shower showers water
    • Replies: 5
    • Forum: UK Electrical Forum
  20. M

    Continuity of ring final circuit..... can somebody help please !!!!

    Im currently studying electrical and im up to dead tests. ive reached continuity of ring final circuit on my scenario cd , in therory i understand the procedure and what to do but im a little un sure on finding the mid point on the sockets . please can sombody go threw it step by step in...
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