On 27/04/2019 10:35, Andy Burns wrote:
Owain wrote:

Would the team like to guess the date of the Wylex CU with 100 mA RCD
main switch
Post-1983 for 15th edition which introduced BS 4293 RCDs and pre-1992
for 16th edition 1st amendment where they became BS EN 61008, judging by
the general look of the thing, I'd say the earlier end of that range ...



Wylex started to use NSB MCBs instead of NB's in the mid to late 80s.

--
Adam