In article ,
"Dorothy Bradbury" writes:
I hadn't noticed the difference before, but you're right, the
newer MK CU's have less clearence between the rail and top
than the previous CU's with the clear plastic covers (which
were much better quality IMHO).

Yes they were - albeit more expensive.

Yes, but I buy MK on quality, not price, so that was expected.

For industrial CU's, I use the MEM memshield 500 (IIRC) range.
(I think MEM recently changed its name to Eaton or something
like that). I like the way you can make up RCBO's by adding
an RCBO pod to their MCB's to get an RCBO of any rating
(although the 10mA RCBO's are only available preassembled).

That is handy re upgrade/migration path.

However, these CU's won't take MK parts -- bus bar is
different style. They also do a downrated residential range
but I've never used that.

I wonder if the bus bar difference can be avoided...
o Move isolator, rcd, split-load-cabling, busbar, RCBOs from old unit
o Adjust the DIN rail to cover plate distance if needed

Could be the DIN plate isn't in the correct place...

I don't think they use a top-hat DIN rail. I don't have one
handy to look in, but I suspect it has an assymetric DIN rail
which only holds the top of the breaker, as the bus bar holds
the bottom.

--
Andrew Gabriel