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RCD types

AJJewsbury
Is it just me or are RCD types starting to get silly. After the EVSE discussion I've looked at the data sheets for a couple of manufacturers and collected the following list of RCD types:
  • AC

  • A

  • A EV

  • A KV

  • U

  • F

  • B

  • Bfq

  • B+

  • B NK

  • B SK

  • R (for x-ray/CAT supplies)



Plus 'delay' types of:
  • (none) - instantaneous

  • G short delay (10ms)

  • S proper delay/selective


I suspect type U might now be obsolete, and  Bfq and B+ from one manufacturer might be the same/similar as B NK and B SK from another, but it's starting to smack of people just making things up as they go along.


Anyone found any more?


   - Andy.
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  • 0
    Just go by the manufacturers recommendation. In a recent GSHP installation I mithered the manufacturer to death until I got the 'We recommend that Type B RCDs are fitted to our kit'..

    That was good enough for me, and I managed to get an CHINT 2 POLE 80A Type B RCD for around £107 inc vat.

    Now, because Type A rcbos have become much cheaper - they are even cheaper than conventional Type A/C ones from the likes of Wylex & Hager - , especially the 'Fusebox' brand, I fit these as standard on any cu change jobs I do.

    As for Type F etc, these are pretty highly specialized and stupidly expensive. In my realm of work, I don't think they have any application so far.
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  • 0
    Just go by the manufacturers recommendation. In a recent GSHP installation I mithered the manufacturer to death until I got the 'We recommend that Type B RCDs are fitted to our kit'..

    That was good enough for me, and I managed to get an CHINT 2 POLE 80A Type B RCD for around £107 inc vat.

    Now, because Type A rcbos have become much cheaper - they are even cheaper than conventional Type A/C ones from the likes of Wylex & Hager - , especially the 'Fusebox' brand, I fit these as standard on any cu change jobs I do.

    As for Type F etc, these are pretty highly specialized and stupidly expensive. In my realm of work, I don't think they have any application so far.
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