On Fri, 13 Oct 2006 00:45:50 +0100, Andy Wade
wrote:

Matt wrote:

MK even have two incompatible busbar systems - old and new.

Three, actually:

(i) the original type with U-slotted fingers for Siemens MCBs;

(ii) single finger type when they changed to Merlin Gerin components c.
1992 - this type had a wider finger for the incomer connection and
finger bent over at 90 deg. from the bar;

(iii) the current K type, flat with all fingers the same and generally a
bit thinner and cheaper-feeling.

I stand corrected. I must have somehow missed the middle iteration
completely.

I just found an RCD on one of the earlier types that works with a
pushbutton test but fails when tested at a socket. It's probably a
dead cert the really old RCD's are no longer available!




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