On 01/06/2021 09:32, Grumps wrote:
On 29/05/2021 13:21, John Rumm wrote:
On 28/05/2021 17:22, Grumps wrote:
Hi,
I've just had an EICR performed on a property that I let. I wasn't
present during the test and my tenant has reported the following back
to me (I'm too impatient to wait for the full report which might not
be with me until the end of next week).

Apparently 4 16Amp MCBs need to be changed to 6Amp. Each MCB is
connected to just one wall-mounted electric heater. The heaters are
rated from 1500W to 2000W.
The last time I had a look at the wiring (when I decorated some 4
years ago), I'm sure it was 2.5mm2 from the MCB to each heater's FCU.
2.5mm2 and 16A MCBs are a good combination, yes? Even 1.5mm2 should
be good.

Surely if I get the 16A breakers swapped to 6A then that won't be
sufficient for a 2kW heater, and probably not even for the 1500W ones?

What possible reason would the electrician suggest swapping to 6A MCBs?

It seems like you will need to wait for the proper report since
something does not add up here.

I have the full report now.

All circuits have been deemed to be reference method 100.

ok might be true...

The 5 heaters are on 1.5mm2 cable with 16A MCB.

So 1.5mm^2 should be fine (so long as they have a cable each, and not
one shared between the lot :-)


The failures are listed as:
3x 1.5mm cable in a 6A breaker (these are lights and smoke detectors).
Incorrect breaker sizes for heater circuits.

Recommended solution:
Downgrade MCBs to 10A C type for inrush protection of 1.5mm cables.

No sure what that is that supposed to mean? You don't size cables for
inrush current anyway. You might choose a MCB type to allow for loads
with excess inrush.

(what kind of heaters are they?)

Split the doubled up 6A circuit.

So my quick questions a
Are you not allowed to have 3 circuits in one breaker?

You don't have three circuits on one breaker, you have just one radial
circuit that happens to have two branches at the origin. Nothing wrong
with that IMHO.

Can you not protect 1.5mm2 ref method 100 wiring with a 16A breaker?

Can't see why not.

The electrician quote to "mend" this is £205 inc VAT.
Ta.


--
Cheers,

John.

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