jurassic spark
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Would a CU with Wylex push button mcb's get a satisfactory EICR?
Wylex push button mcb's
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VERY unlikely. Lack of RCD and the age would suggest probably lack of or inadequate earth bonding. That's before you even look for any actual faults.
jurassic spark
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There is a front end RCD at the installation. I've also noticed that you can still buy these mcb's, thought that was a bit strange.
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Or. 1361s. Then jam a 1362. 5A plug fuse in and wonder why the two halves of the holder don't close ( or better still a 13 A fuse
)just saying
The push button breakers were never type B. They were 3871 Type 2. The labels on them saying "Type B" predates the use of letters for trip curves and instead is a wylex classification code. B - breaker, R - Rewireable, C - Cartridge.
The plug in breakers you buy now* for wylex boards are 60898 type B and have the standard toggle switch rather than push buttons.
*Actually the case for the last 20 years, but they used to colour code the toggle and they haven't done that for about the last 15, GEC also used to make a range of compatable breakers
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That would depend if the rest of the circuit characteristics are within the Max permissible earth loop impedance for the required disconnection times..? :C
Pretty much the same as with any protective device..?
Tables in Chapter 41 give Max ELI values for current ratings of various type of devices..
Or if in doubt you could check with specific manufactures data.
However as ProDave pointed out there could well be other issues due to the age of the installation.
See page 18 of Best Practice Guide 4 for one opinion on this issue:-
https://www.electricalsafetyfirst.org.uk/media/1626/best-practice-guide-4.pdf
Guinness
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