On 17/11/2020 14:00, Andrew wrote:
On 17/11/2020 12:32, John Rumm wrote:
On 17/11/2020 11:33, Andy Burns wrote:
John Rumm wrote:

There is no actual requirement for a RCBO to have a FE connection
(and indeed many brands don't), however if its present, then the
standards do have things to say about how it should work IIUC.

I couldn't see any mention of PE or FE in BS EN 61009-1, other than
in deleted wording.

The 2004 version has a requirement to use label the terminal with the
protective earth icon as per IEC 60417-5019a rather than the
functional earth symbol as previously recommended!

Can't recall where I did see mention of it now.


Do RCBO's still consume power even when no user devices are
using power ?.

Yup that have "always on" electronics - so will consume a very small
amount same as any RCD.

(The MCB element will also dissipate a certain amount of heat when on
high load since this is a function of how the thermal part of its trip
mechanism works)

Assuming 6 in the consumer unit of a typical average house,
how much leccy is used per year ?.

Finding data for the power consumption or the RCD elements themselves is
actually quite tricky. ISTR Wylex publishing a figure of between 1.5 and
2.5W per RCBO depending on load.

So if we said it was 10W total for your 6 circuit CU, that would be 1kWh
every 100h operation, or ~87 kWh - could be £10 or so depending on your
unit price.



--
Cheers,

John.

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