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  1. Dozer 73
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    Dozer 73 Nitramlegin

    Location:
    saddleworth
    • Useful Useful x 6
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  2. spinlondon
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    spinlondon Trusted Advisor

    Location:
    Harlow Essex
    Type B RCDs are still pretty rare, but not as rare as type B RCBOs.
     
  3. haptism
    Offline

    haptism Regular EF Member

    Location:
    SW. London
    Good article; then if a circuit has USB sockets, then what type RCD would it need. Thought it would not need other than usual AC type as the USB ELV bit is separated from LV (at least the bonafide ones) are they not. ?
     
  4. gazdkw82
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    gazdkw82 Trainee Trainee Access

    Location:
    leicester
    Great article.

    I will defo brush up on the different types of RCD’s. It’s not very well known about the different types. I would never have known the wrong rcd in the wrong installation could render it useless
     
    • Like Like x 1
  5. suffolkspark
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    suffolkspark Electrician's Arms

    Location:
    suffolk
    so is it saying if an installation is fitted with the most basic types of rccb or rcbos, then later say solar pv is installed,,,, then they all need changing because they wont work properly?
     
  6. spinlondon
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    spinlondon Trusted Advisor

    Location:
    Harlow Essex
    Yes.
     
    • Optimistic Optimistic x 1
  7. lurch
    Offline

    lurch Electrician's Arms

    very interesting.......... very surprised my inspector has never brought this topic up. I feel a non conformancy coming on . . . .
     
    • Like Like x 1
  8. lurch
    Offline

    lurch Electrician's Arms

    . . . . off topic here, but cant find the "post a new topic button". . . . help!
     
  9. Richard Burns
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    Richard Burns Trusted Advisor

    Location:
    Cambridgeshire
    Business Name:
    Richard Burns
    Post new thread still seems to be in the top right hand corner of the page, has yours disappeared?
     
  10. spinlondon
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    spinlondon Trusted Advisor

    Location:
    Harlow Essex
    Nothing there for me.
    Found it.
    Have to click on home, then forums, then the forum you want to post in.
     
  11. Ian1981
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    Ian1981 Electrician's Arms

    Location:
    North east
    Where a microgenerator having a d.c. source does not incorporate the equivalent of a transformer providing at least simple separaton between the d.c. and a.c. sides, an RCD installed for fault protecton by automatc disconnecton of supply or for additonal protecton (IΔn ≤ 30 mA) must be of a type that will operate as intended in the presence of d.c. components in the residual current. (This does not apply where it has been established – such as from a specifc writen statement given by the inverter manufacturer – that the inverter provides galvanic isolaton between the d.c. and a.c. sides that prevents it from feeding d.c. current into the electrical installaton.)
     
  12. gazdkw82
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    gazdkw82 Trainee Trainee Access

    Location:
    leicester
    So an rcd in this type of installation...would it still pass trip tests? Ramp tests?
     
  13. suffolkspark
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    suffolkspark Electrician's Arms

    Location:
    suffolk
    so are PV installers trained so as to be aware that they're installations could render an existing electrical one unsafe? and also on larger installations where a solar PV set may be running off 1 did board, is every other rcd/rcbo in the installation effected of will the DC current just bugger off upstream? where is it trying to go.... ?
     
  14. lurch
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    lurch Electrician's Arms

    thx. . . .
     
  15. Paignton pete
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    Paignton pete Regular EF Member

    Location:
    Over the rainbow
    This is exactly why I am part of this brill forum.

    Nice one dozer73
     
    • Like Like x 1
    • Agree Agree x 1
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