isolated

isolated

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  1. M

    UK Isolated, noise-free electrical ground

    Has anyone come across this before - The LC/TQ electrical outlets must have an isolated, noise-free electrical ground that is connected to the main earth ground for the facility. Noise-free typically mean Total Harmonic Distortion (THD) more than 3% is not acceptable. Distance of 80m, so do I...
  2. Qwe7410

    How to keep power trips isolated and not trip the whole place when testing faulty appliances?

    Having some 1400W 230V heaters to test and repair that have a power trip problem. I've unplugged all the connections and open them up one by one to identify the part that is causing the trips. Everytime it trips, it trips the whole place through the main circuit breaker. How can I do it safely...
  3. D

    isolated supply help!!

    Guys in a solar PV plant room I have a single phase LV board for power and lighting. This is fed via 2 phases off a solar inverter through a 415 > 230v Isolating transformer. The earth conductor in the secondary side of the transformer is not connected. Theres a 16mm cpc going from the LV board...
  4. D

    Can I run a ground wire to its own isolated grounding rod?

    Hello, I just bought a new range and my 1963 house has a 3 wire receptacle. My instincts are telling me I shouldn’t just pigtail a 3 wire to the back of my oven, shove it in and call it a day. That’s what everyone around me is telling me to do. My understanding of the old style 3 wire is that...
  5. E

    Continuity on isolated circuit

    Hi a DIYer here, I am planning on adding a socket spur to a ring circuit. I isolated the MCBs and RCBs and main switch at the Consumer Unit. I tested (using the voltage and continuity tester seen below in the video) if there was isolation there and all was in order. When I got to the socket, I...
  6. H

    Understanding isolated (unbonded) neutrals and grounds in panels/subpanels

    I have a question regarding the isolation of grounds and neutrals in a subpanel. First, please bear with me as I describe what I see in the panels associated with my home. I live in a mobile home. My meter feeds directly into a 200-amp cutoff panel. Within that panel are two, 100-amp breakers...
  7. EricMark

    Isolated circuits and the EICR are they included?

    If some one drops tails or locks off a circuit for any reason, be it faulty or simply not used, is it tested or reported on an EICR? In other words if a landlord knows a circuit would get a C1 or C2 and he decommissions it before the test then recommissions it after is there something we should...
  8. Matt

    TT and Isolated power supply question

    Hello, This might be a daft one, but hell. I recently spoke with one of the qualified sparks on my site. He was installing an ISP (isolated power supply) cabinet for a bunch of circuits. As I never seen one of these before I became interrested and asked him about what it was and how it works...
  9. D

    How to prove a supply has been isolated, just throw a crowbar at it.

    Seriously just throw a crowbar at the incomer, what could possibly go wrong?
  10. The_apprentice2.0

    Supply that can not be isolated from previous 'dodgey tenant'

    Hi All, Found this beauty in a rented property.... the landlord has refused to pay for any renovation of the property as he deems it unnecessary, has even refused to pay for the repair leaks in the past etc.... this supply runs down the wall cavity never to be seen again .... when house supply...
  11. B

    Isolated Board but still live

    Any advice would be greatly appreciated on this. Visited a job the other day where the light circuit had blown at the board. We Isolated the mains and tested but neutral bar remained live. Found that a rogue twin and earth with its neutral was on the bar and was live however the line conductor...
  12. I

    Ground Fault Detection Interrupter (GFDI)

    Some inverters are provided with GFDI and some are not. Is this a regulatory thing dependent upon the country of use intended for the product?
  13. R

    Technetix Tris fully isolated system outlet, outdoors? Yes or No

    Hi, its my first post, looks like an amazing forum. I have a virgin Tivo box. Usual issue with messy install and I do not like the virgin face plate that covers the splitter etc. I have installed a 37mm deep 2gang metal box into the wall along side another for a double electrical sock. Iv...
  14. M

    Domestic lighting issue?

    Hi guys, I'm not an electrician but after some advice please. I've replaced a few light fittings today but have hit a stumbling block. The kitchen lights existing wiring has 3 main wires going to it, but one of the black wires has been snipped. So I'm left with 3 red, 3 earth and 2 black. Is...
  15. G

    Eicr coding

    Doing a test the other day and found a couple of metal light switches no earth to faceplate just to back box but both lugs were fixed. What code do you reckon I'm saying 3 but it's a 2 minute job anyway to rectify. Can't recall seeing it before though Cheers
  16. S

    Why don't we use isolated supplies in our homes?

    I'm sure most people here know that shaver sockets have an isolating transformer inside. This means that should a person come into contact with the live conductor and earth, the risk of electrical shock is greatly reduced because the secondary side has no reference to earth. My question is a...
  17. D

    2 Circuits, 1 MCB

    Good evening all, I get a decent amount of work from a kitchen company and do all the electrical work for them. As expected each one has its challenges, but this job i've looked at today has a kitchen ring on a 32Amp MCB, and its own cooker circuit on a 32Amp MCB. Once I isolated the cooker...
  18. T

    Control Panel Isolation question

    :banghead:Hi all Just a question on isolation on a control panel which has contactor and overload set up for a small pump. When the main isolator is off parts of the auxilary side of the overload was found to be still live from another source. Would this be covered by BS7671 or are there...
  19. N

    Testing Zs on an IPS system?

    Hi all, Does anyone know how to test the Earth Fault Loop Impedance on a monitored circuit such as IPS? I have found in the past that even a Martindale Socket Voltage Tester can trip out the circuit as it is monitored. I also found that no matter which way the neutral and line test probes...
  20. L

    RCD 0.0s??

    Hi all, Just back from an EICR where one of the RCDS was testing out at 0.0ms for the 1/2, 1 and 5 tests both ways, not had this problem before, can anyone shed any light? Thanks in advance, Loops

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