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Discuss EICR coding (C1,C2,C3,N/A) in the Electrical Courses & Electrical NVQ's area at ElectrciansForums.co.uk.

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  1. gazdkw82
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    gazdkw82 Trainee Trainee Access

    Location:
    leicester
    Just doing some mock exams for the upcoming 2391 course.

    Confused on this question as I got it wrong.

    Q. If a lighting circuit installed in metal conduit in a shop supplied from a TNS system had no RCD provided for fault protection but achieved disconnection times what would the outcome be on the schedule of inspections.

    I put it as a C3. Improveme needed.

    The answer has come back as N/A.

    Can any explain this?
     
  2. spinlondon
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    spinlondon Forum Mentor

    Location:
    Harlow Essex
    Yes.
    There is no requirement yet to provide RCD protection for lighting circuits.
    The lights themselves do not require RCD protection, and the cables are contained in metal conduit which provides protection from nails and screws.
     
    • Agree Agree x 10
  3. gazdkw82
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    gazdkw82 Trainee Trainee Access

    Location:
    leicester
    Ah (silly sod) because I've been studying the 18th I've convinced myself that rcd on lighting circuits is a requirement.
     
    • Funny Funny x 3
  4. Ian1981
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    Ian1981 Forum Mentor

    Location:
    North east
    It is in domestic installations when the 18th edition comes into full effect
     
    • Agree Agree x 5
  5. buzzlightyear
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    buzzlightyear still kicking sand, before pushing up daisies . Electrician's Arms

    Location:
    star command
    • Like Like x 1
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  6. essex
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    essex Forum Mentor

    Location:
    Wiltshire
    Was the question literally written word for word like that?
     
  7. gazdkw82
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    gazdkw82 Trainee Trainee Access

    Location:
    leicester
    Yes.

    Why?
     
  8. essex
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    essex Forum Mentor

    Location:
    Wiltshire
    Not enough info in my opinion.

    No mention in if the conduit is earthed.

    No mention on if it is surface of chased in the wall.

    Assuming it is earthed then no code. If it is not earthed then C2 for no earth and if it is chased in the wall with no earth then a C3 for no RCD also.
     
    • Like Like x 1
  9. gazdkw82
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    gazdkw82 Trainee Trainee Access

    Location:
    leicester
    Yeh I agree
     
  10. Flanders
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    Flanders Regular EF Member

    Location:
    Tamworth
    Yes the question is a bit confusing its trying to dissect what they are getting out , For example what part of the schedule are they referring to

    RCD(s) provided for additional protection, where required - includes RCBOs (411.3.3; 415.1) then N/A

    Adequacy of protective devices: type and rated current for fault protection (411.3) then it would be Pass​
     
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  11. spinlondon
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    spinlondon Forum Mentor

    Location:
    Harlow Essex
    Doesn’t matter if it’s earthed.
    Doesn’t matter if it’s surface or concealed.
    Only thing that would mean RCD protection is required, is if it’s part of a circuit of a location containing a bath or shower.
    It’s a shop, so that is unlikely.
     
    • Disagree Disagree x 2
    • Like Like x 1
  12. Flanders
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    Flanders Regular EF Member

    Location:
    Tamworth
    I thought if your using conduit as mechanical protection it had to be earthed , or does it not because conduit will prevent a screw or nail from Penetration , ( Now there a word for a Friday afternoon :))
     
    • Agree Agree x 1
  13. gazdkw82
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    gazdkw82 Trainee Trainee Access

    Location:
    leicester
    It's still an exposed conductive part
     
  14. spinlondon
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    spinlondon Forum Mentor

    Location:
    Harlow Essex
    The options for providing additional protection for cables concealed in walls are:
    to bury the cables at a depth greater than 50mm,
    to use a cable with an earthed screen,
    to use earthed conduit or trunking,
    to provide mechanical protection sufficient to prevent penetration by screws and nails,
    to run the cables in prescribed routes and provide RCD protection.
     
  15. Flanders
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    Flanders Regular EF Member

    Location:
    Tamworth
    Ok so it has to in an EARTHED conduit system. So conduit must be EARHED
    Unless the conduit is sufficient to protection to prevent penestration by screw or nail. Then NO EARTH is required.
    Now I would of said that all the metal conduit I have used would stop a screw or nail but is there any metal conduit that could be penertrated?
    I
     
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