Are the device terminals designed to take a busbar prong/fork and a fine stranded cable?
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I would hope so as that DB has 3 neutral bars. With the fine strands welded/crimped together of course. I see the newer crabtree and siemens MCBs at least, now have terminals that have 2 seperate compartments so differing size and shape conductors are properly clamped.
Nope - can't see anywhere here where there is a terminal which would need to accommodate both a cable and a busbar.
I was looking at the photo you posted!
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Ah - OK - yes. If you were to want some non-RCD circuits you would need a busbar and two cables in the main switch outgoing L.
But that does not mean that Wylex had the nous to make that possible.
But that does not mean that Wylex had the nous to make that possible.
Why are 2P busbars to support 2P RCBOs as rare as rocking horse ****?
I went to the wholesalers the other day to order a couple of 2 pole RCBOs and was told that no such device existed! 
I have only once seen a 2 pole busbar and it was in an old db fed from a 1 phase 3 wire supply.
I have only once seen a 2 pole busbar and it was in an old db fed from a 1 phase 3 wire supply.
2 pole busbar: http://www.schrack.com/shop/protective-devices-rcds/busbars/busbar-fork-2p-16mm2-1mtr-bs900112.html
Substantial range of other equipment as well.
Substantial range of other equipment as well.
I know they exist - what I meant, and should have written, is why are they so seldom used.
because they are only useful for device which take up 2 slots ?
K
kai
This unit only has two neutral connector bars, & was never intended to have any high integrity ways in it.
The RCD slides freely along the din-rail to allow a flexible configuration of ways between RCD's.
The RCD slides freely along the din-rail to allow a flexible configuration of ways between RCD's.
and this one?
normally unused ways are blanked with plastic insets; do they now have to be metal blanks?
BS7671 says nothing about the blanks. They can be made of anything you want.
As the MCBs etc. are plastic, it makes no difference anyway.
Manufacturers of consumer units have different things to say. Such as having a top hinged metal cover over the devices, metal hinges, intumescent strips inside, LSF paint and other nonsense.
A cynical person would think that the entire thing had been designed purely so that manufacturers of consumer units could launch entire new ranges of products, compelling everyone to spend far more on the new expensive types, while at the same time making the older plastic ones obsolete and worthless.
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