protection

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  1. chris83

    Adding to kitchen wiring does cooker circuit need RCD protection?

    Hello all, first post by a new member so apologies for any posting faux pas in advance. (Hopefully this is the correct place to ask this rather long question) I’m in the process of re fitting my kitchen and was planning on making a couple of minor changes to the wiring installation. All of the...
  2. a-z electrics

    Surge Protection Devices for domestic - what do you think?

    Evening all, Just attended elex exeter and see there's a big push on these SPDs coming as standard now in domestic consumer units. Hager, Lewden and Contactum to name just 3. I have had at least 2 clients in the last few months whose appliances have been damaged by apparently surges on the...
  3. David Prosser

    Earthing and protection course. EA Technology anyone been ?

    Hi, looking to broaden my knowledge regarding earthing and protection. EA Technology have been mentioned as having decent courses in this area. I would like to hear from anyone who has been on training with them even if not in this field as often a standard will run through most training...
  4. S

    415v 3 phase sockets and rcd protection.

    Afternoon all, Looking for a little guidance, other than doing sub mains in armoured I don’t do much three phase work. I’m looking to install some final Circuits for some three phase cooking equipment but I find myself stuck on a few things, as the sockets will be over 16amp they will need to...
  5. Thomas Simons

    RCD Protection for lighting within communal parts

    I'm due to start working in a building which houses lots of flats over 6 floors with 2 internal communal stairs. I'm due to replace 13 ceiling lights per floor/stairs from a halogen bulkhead to a ELD 17w LED microwave/emergency bulkhead. Each floor is fed from a Square D B6 QOE MCB on a 3...
  6. spud1

    30mA RCD protection required for existing circuit?

    If I was replacing an existing light fitting in a domestic premises, making no alteration or addition to the circuitry, would I then be obligated to provide that circuit with 30mA RCD protection if it didn't already have it?
  7. P

    C/U Tails in wall - protection required

    The existing C/U is at almost ceiling height in a room and the old tails are plastered in the wall below it before going outside to the meter cupboard (they have no protection and are just covered in plaster). The tails have to be upgraded when the C/U is replaced, so I could take the option of...
  8. T

    RCD Protection for submains

    Evening all We have been asked to do some redial work picked up by a testing company i a hostel. It has been picked up that is no RCD protection in the rooms There are 5 submain circuits that feed the 20 consumer units, 4 consumers units per submain (B32) Each room have a consumer unit which...
  9. Chinese Dave

    Protection to be used on a 5KW motor???

    Hi, I'm Dave and I was wandering if I could have help with something. If I were to wire a 5KW motor what means of protection should be incorporated into the inverter for compliance with BS 7671? Thanks! :)
  10. HappyHippyDad

    Does this require RCD protection?

    I have been asked to connect a 9kW kiln to the consumer unit. The consumer unit is in the garage and the kiln will also be in the garage. All the cable will be surface mounted, probably in conduit. It's a steeple series E consumer unit with spare ways on the non-RCD side and no spare ways on...
  11. Ian1981

    Overload protection to a central heating pump x2

    Is it a requirement to provide overload protection to a central heating pump rated at 2.77amps? I’m kinda under impression that an almost 3 amp pump jamming will get rather hot. I mentioned this to the heating installer who has requested we just installed 2 x isolators for the pumps through a...
  12. spud1

    Why does AFDD protection need to be per circuit?

    Hi again! Why does AFDD protection where provided need to be installed per circuit instead one AFDD covering several circuits, like for example RCDs in domestic split load CUs? Is there a technical reason or is it another manufacturers money making myth!? Thanks.
  13. J

    Protection Against Voltage Disturbances

    Quick Q. Am doing 18th edition at the mo. Reviewing chapter 44 (from p95). Calculated Risk levels for the the use of SPDs. When you have calculated the risk level (CRL), what do you compare it against to know whether the risk is accelerate or not? Worked examples are in the regs book with...
  14. J

    RCD protection in a warehouse

    Is there such thing as a three phase RCBO??! Needing to install a three phase circuit for a 8kw three phase heater- connection by a 20a comando I want to use the metal trunking I will be installing for various 13a sockets- so the circuit doesn't need the rcd protection- but i beleive the 20a...
  15. spud1

    RCD protection maths?

    Hi all, My colleague and I were having a discussion today about RCD protection, as you do, and the reasoning behind why it is stipulated that 30mA should be the rating of an RCD for additional protection. Now we all know the rules regarding the maximum trip times for the various tests, but I...
  16. A

    New Socket Protection Question

    I have to install 2 new sockets into a garage, but unfortunately the consumer unit has all spaces allocated. One of the circuits has a 40Amp circuit breaker that is feeding a CU out into a summerhouse. The maximum load in the summerhouse would be around 10Amps with the summerhouse heater...
  17. L

    Frost protection in attic/loft

    Hi, Last year we had a burst pipe in the loft - made a heck of a mess! I would like to try and get some frost protection up in the loft. Originally I was thinking of some trace heating cables but having been up there I can see there are a lot of pipes! They are all insulated with 20-30mm foam...
  18. D

    Lightning protection system

    HI All, Does anybody know something about requirements about lighting protection system?
  19. Andy-1960

    Surge Protection Devices

    Thought I’d do a bit of browsing on this subject and stumbled across this video from the grand old US of A by a guy who calls himself the ‘Surge Protector Guy’.. great I thought this could be informative... I watched and was left thinking ..Why?
  20. M

    Fire rated back box advice

    Hi all, I was wondering what some of you recommend with regards fire rated back boxes. this is an install in my own home and want the best option available (cost not been an issue) scenario : timber frame house semi detatched and currently no outlets on party wall (double boarded) I will be...

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