I have posted a piece here which is also on the TT topic, but is more general and I think a new thread would be better. Your voice is heard. See below.
This is beginning to turn into my blog, I would welcome other comments given consideration of the above.
Andy, 536.4.2.4 & 536.4.3.2 actually give the game away completely, it says we need the manufacturers instructions (MI) or information several times, and says the OPD shall usually be UPSTREAM of the RCD or whatever. So adding up all the MCB ratings if they are downstream would be the same as 536 suggests, and this application of some "magic" diversity some kind of sop to complaints or perhaps reason. But even with that the instructions still say further protection is needed as in Mikes unit, so the situation is further confused.
Although I read the DPC for the 18th I don't remember this change, which is very significant. I think we have always assumed that the protection of RCDs was adequate, but this seems to be saying that someone has a significant problem with overcurrent, although I know of no cases. Perhaps someone does, in which case please reply.
This is beginning to turn into my blog, I would welcome other comments given consideration of the above.
Andy, 536.4.2.4 & 536.4.3.2 actually give the game away completely, it says we need the manufacturers instructions (MI) or information several times, and says the OPD shall usually be UPSTREAM of the RCD or whatever. So adding up all the MCB ratings if they are downstream would be the same as 536 suggests, and this application of some "magic" diversity some kind of sop to complaints or perhaps reason. But even with that the instructions still say further protection is needed as in Mikes unit, so the situation is further confused.
Although I read the DPC for the 18th I don't remember this change, which is very significant. I think we have always assumed that the protection of RCDs was adequate, but this seems to be saying that someone has a significant problem with overcurrent, although I know of no cases. Perhaps someone does, in which case please reply.
