metal

  1. wsoppitt

    enlarge existing hole in metal panelling

    hey guys / girls, Whats the best way to enlarge a round hole in overhead metal panelling ? Unfortunately i cant find a holesaw the correct size , so advice needed. thanks
  2. craigwolf

    How do I install an outlet ( metal junction box with a gfci ) under sink for dishwasher safely?

    I was having a dishwasher delivered from Best Buy but they wouldn't install unless I had a dedicated outlet for the new d/w plug. I looked up code and its supposed to be under sink. I went to Home Depot & Lowes and they told me I can do this myself. So each helper I talked to had a different...
  3. pirate

    Just interested to know how you all make holes in metal enclosures, CUs etc

    This was prompted by me seeing a couple of videos of cone/step drill being used to make holes in a CU. I use a step bit quite often, especially in plastic enclosures, but in metal ones the drilling action causes noise and considerable vibration. I like to install with as little hammering and...
  4. DaveLea

    No earth in metal light switches

    I recently had a look behind my light switches for the first time and have found that all of them have no earth. This includes some metal switches that were there when we moved in. We've had a couple changed to metal previously and it looks like the electricians have put in a metal back box and...
  5. Shaun-

    Metal Supply Cupboard Used As MET

    Hi, first time poster, long time lurker. Guess I'll have to start getting involved... Just looking for some advice really on something I haven't come across before (I don't usually work on farms). So I'm working on an installation that is TN-C-S (PME too) and I'm putting in a new TT sub-main...
  6. jonperry64

    Are metal clad sockets more heat resistant than plastic ones?

    As per title really. I need to install a storage heater which is quite close to a 13amp socket. The socket would be about 5cm from very bottom of heater. I don't think much heat is emitted from that part of the heater, but as a precaution, would there be any advantage in changing the socket to a...
  7. B

    Adding liquidtight to rigid metal conduit

    Hello I have an existing run of rigid metal conduit outside of my house that feeds several outdoor receptacles. There is no separate ground wire inside the rigid metal conduit. Is there a way that I can use liquid tight to run to a new extension receptacle? What I am particularly concerned about...
  8. C

    Gas bond, plastic pipe but metal into properly

    Hi Guys, I'm looking for some opinions, I've got a customer with a gas meter in an in ground box (see picture). The pipe to the meter is plastic as the meter was moved a few years ago but its metal where it enters the house from the outgoing side of the meter. Would you bond this? The customer...
  9. newfutile

    Metal steps secured to concrete (bonding)

    We have had 2 metal steps installed to cover main supply cables (out to flats) from a Ryefield . when measured IR from MET to steps i got 0.091 MegOhms. The usual calculations are for when a 30 ma RCD is protecting (which is not the case here) 91 Kohm is above the usual value of 23 Kohm I...
  10. J

    Metal panel locks on plastic enclosures

    what’s your guy’s opinions on metal panel locks on fibreglass/plastic enclosures. The reason for asking is I’ve seen a few of these enclosures fitted with metal locks and I know the likely hood of the lock being made live it extremely low but would you still class the locks as exposed conductive...
  11. Mark42

    Metal saddles inside trunking when only 400mm off a concrete floor?

    I'm a bit out of touch re 18th edition. Is it really necessary to fit loads of additional metal saddles inside trunking when it's only 400mm above the concrete ground floor of a sports hall? All the stuff about premature collapse makes sense, but where, in this case, if the cable going to...
  12. W

    change plastic light switches to metal ones

    hi guys probably been asked a thousand times before but i wanna change plastic light switches on wall to metal ones but there are only 2 red wires inside metal back box with no earth wires so do i need to stick with plastic switches?
  13. B

    Live metal casing on new light

    Hi guys looking for advice here, Voltage on light casing! Just been out and bought a new light fitting (I will attach the photo of said light) simple 2 core and earth terminal connections. After install i wanted to check the lower ring of the light to see if it had earth continuity from the...
  14. S

    Rear Knockouts on Metal Units

    Hey All, So query I have had for a long time is this: Why supply special entry glands for a metal unit (top and bottom) to help stop the spread of fire/dust ingress/water/fingers etc then go and have a bloody great big knockout at the back which only needs a grommet strip to protect the...
  15. A

    18th Edition metal fixings requirements help

    Hi guys I'm after some advice please on with 18th edition and requirement of fixings. I'm wondering what fixings people are using in brick,thermalite and concrete with rebar?? Also do your change your fixings depending on type of clips used like cleats for example?? Thanks
  16. A

    New metal 2 way unit fed from old Plastic 10 way consumer - Ok or not ?

    Hi, I have just had work done but not sure if this is acceptable as i am having doubts. I have an existing 10 way 'Plastic' consumer unit, fitted in 2004. Electrician has now added a new 2 way METAL unit to feed the dormer Ring mains and Lights & the tails are fed to inside the old 10 way...
  17. A

    Metal boxes not grounded properly

    While adding come circuits to my garage I realized that some existing circuits were not done correctly. These are 240v 30 amp circuits to run power tools ( tablesaw, bandsaw ...etc ) There is 10ga 2 wire romex ( so black, white, bare copper) feeding a metal box holds a 240v receptacle...
  18. A

    Magnets on a metal clad distribution board

    What is everyones opinion about fridge magnets being used on a consumer unit? I understand edi-currents and that it’s not recommended, but is there solid reasoning why? Just for some context, I work for a large housing association in the West Midlands UK completing the electrical safety...
    • Alex Brodie
    • Thread
    • 18th edition amendment 1 board distribution distribution board fuse board magnets metal metal clad
    • Replies: 20
    • Forum: UK Electrical Forum
  19. newfutile

    Metal chequer plate floor bonding

    In a communal electric intake room for flats (meter room) there is lots of bonded trunking and tray, also the metal door frames were found to have extraneous parts linked to earth , these have now been bonded. They have now fitted a metal floor , i have not conducted a IR test to earth as yet...
  20. D

    Metal boxes NO earth lug...

    So, my brother just moved into a 1980s built semi and some of the dimmers werent working and some other stuff needed replacing like cracked sockets. He wanted brushed chrome so being a fairly new build I though easy no problem... Just dropped down a few of the dimmers , one of them being an...

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