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earth

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  1. A

    3 core and earth on a light fitting

    Good evening. My son in law has moved into a 5 year old house with a conservatory. There is a 3 core and earth lighting cable poked through from the house into the conservatory which has never been attached to a light fitting. There is only ONE switch serving this light NOT two. My question is...
  2. M

    Where is the correct place to terminate a seperate earth ran with a SWA ??

    Hi all. I have noticed there are two schools of thought here when running a separate earth with a SWA to a large DB, where is the correct place to terminate the earth ? . We can go straight in to the internal copper earth bar as we have spare unnumbered holes for it , or we can lug it and go on...
  3. J

    Washer earth trips unless it is rocked back & forwards aggressively.

    Very appreciated forum. Washer earth trips RCCB unless it is rocked back & forwards aggressively. This is a struggle. One brush had worn excessively and tripped and changed. I wonder if there is excessive wear due to uneven commutator causing a pile of debris bridging to brush housing? Any...
  4. B

    Safe zones and Earth cables

    I've been told I need to upgrade the main earth bonding to 16mm. The consumer unit is on the wall adjacent to the externally mounted incoming supply box - I basically need to run the earth wire down the corner about 1m and then across the side wall about 30cm then through and into the back of...
  5. K

    No earth at lights, customer won't change?

    Hi guys wondering if you could help? I have just installed a new fuseboard with rcbos and spd. During the install I noticed that the lighting circuits have no earth. I have informed the customer but she doesn't want me to change lights to class 2 fittings as she is happy with her current...
  6. M

    twin and earth cabling size for commercial buildings

    Hi, The current carrying capacity tables in the BS 7671 for twin and earth cables are only for buildings that have thermal insulation. I'm working on a commercial building, the inner walls do not have thermal insulation, what can i use for the current carrying capacity of the cables. The...
  7. M

    Earth not connected on a socket

    I was going to swap a socket in my house for a socket with USB connection. I started to remove the socket and noticed that both earth wires from both cables (part of a ring main) are wired into the metal back box and no earth connections into the actual socket see photo. Now I'm sure this is...
  8. A

    Correctly closing off a dead twin and earth cable in a loft.

    Correctly closing off a dead twin and earth cable in a loft. My old house used to have radial circuits serving night storage heaters. Those radials came from a dedicated consumer unit in the garage which has now been removed and all cables from it are now dead. Each night storage heater was...
  9. Joules

    My electrician wants to remove the inverter's supply PE and...

    ...Replace it with a connection to a ground spike via the heat sink. The 1.5kW GTI has no off grid capability. This separates the house PE from the inverters but is it the right thing to do? New to the forum, this is my first post.
  10. O

    Live earth wire concern

    Hi, thanks in advance for any advice here please on a safety worry... My son lives in a rented house and recently got a strong electric shock when he turned on a light switch, he felt it go down his arm and to the floor (bare feet, tiled floor). An emergency electrician came out and found that...
  11. richardg

    Solar PV earthing earth rod or main earthing terminal in house

    Hi installing my first solar PV on my own home before starting the courses next year and need some advice on earthing PV. System 6kw solar PV - 2 strings Solis Rhi inverter 20Kwh pure energy battery’s The solis inverter has its own TT system to run as a floating neutral when in UPS mode which...
  12. H

    LIGHTING TOWERS EARTH STAKES

    Is earthing stakes mandatory here in Australia, for mobile lighting towers in mining?
  13. A

    Accidental connection of earth

    I inadvertently connected earth wire to L in bathroom pull cord switch as well as the live wire, I connected the other wire to L1, when I switched light on it worked ok but when switching it off and on again it tripped the breaker as it should, however when I reset breaker light came on and was...
  14. OnlQQker

    So There I am Looking Out Over Hadrian's Wall..

    When I notice one of those new lodge sites. A bit like the old caravan parks but way more modern. Composite cladding, plastic ridged rood tiles, double glazed french doors etc. So me being me instantly loses interest in the old Roman wall and trying to work out if it was actually built to...
  15. H

    What’s the point of earth loop if your rcd performs ?

    Hi guys was having a conversation as a apprentice I’m still not sure and was wondering why earth fault loop impedance is important if you’ve proved your earth because the rcd trips proving your rcd performs ? Can anyone tell me thanks so what my question is in short what’s the point of it if...
  16. timhoward

    Extending earth rods making minimal difference?

    Today I found a 466 ohm Ze. That's actually a new upper record for me. I assume the rod was completely corroded through. So started to bang in some new 5/8ths rods. 1 rod - 180 ohms. 2 rods - 95 ohms. 3 rods - 93 ohms. Hmm. 4 rods - 92 ohms! Grrrrr. I gave up then as I'd run out of rods. I...
  17. D

    Earth cables in light pendant

    Hi all, recently changed a metal light fitting back to a pendant all went well with the help of others on here but I have a question that has been niggling me. All the earths were twisted together then sleeved in earth sheathing is this ok or do they need separating and sleeving individually ...
  18. B

    Positive earth understanding

    This is really embarassing i cant get my head round Positive earth So have a classic with spotlights that are relay switched at the the loom i have -12 volts so would it be as simple as grounding the other wire after it passes through the bulb So is it -12volts like a negative potential of 12...
  19. F

    4 black 4 red wires 1 earth

    Hi. I’m changing a ceiling light that is part of a 3 way switch. Stupidly I didn’t take a photo, I just can’t get it working properly. I’ve put the reds in a box out the way and the earth where that should go, but the 4 black wires are confusing me. Any help would be great
  20. Calebp43

    Why a separate earth for caravans

    I am an apprentice and was just wondering the reason why you have to put a separate earth into a caravan? My friend has asked me to do a hobble and bring a supply to his caravan from his board. I do need to earth the caravan separately right?

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