3 Core and Earth plus a FCU help!!

DIYBlues · Jun 10, 2012

Hi Guys

I need to add a 3A FCU to 3 core and earth cable for a timed extraction fan (prior to the TP switch), how is this achieved with only L N and E connections on the FCU?

Regards
DIYBlues

spark 68 · Jun 10, 2012

Add the 3A FCU prior to the supply to the circuit for the room in question (bathroom?), then both your permanent and switched lives will be fused down.

nickblake · Jun 10, 2012

pick up the supply to the light and add it there it then protects the whole lighting circuit for that area including the fan this will be done before the switch so its feed in and out to the FCU feed then run a 1.5 out to the light and wire as you would with a normal light and fan configuration

DIYBlues · Jun 10, 2012

Thanks guys

I've already installed all the cabling back to the airing cupboard for both the TP and FCU, I read on another forum to install 2 x FCU's in line one connecting L, N and E and the next SL, N and E, what do you think of this method?

Here is diagram of my current cabling set up.

[ElectriciansForums.net] 3 Core and Earth plus a FCU help!!

nickblake · Jun 10, 2012

DIYBlues said:
Thanks guys

I've already installed all the cabling back to the airing cupboard for both the TP and FCU, I read on another forum to install 2 x FCU's in line one connecting L, N and E and the next SL, N and E, what do you think of this method?

Here is diagram of my current cabling set up.

View attachment 12862

Nice one so the easiest way to do it would be to put an FCU between the dist board and the lights on the feed if you do that the whole section would be covered by the one fuse , you could even put the fcu nest to the dist board and lable it up ,another way to do it would be use a grid with 2 fuses

Guitarist · Jun 10, 2012

If you install a 3A MCB in the CU you won't need the FCU. Otherwise, you could just install a 3A FCU where the lighting circuit feeds the bathroom and another where it feeds the en-suite.

DurhamSparky · Jun 10, 2012

just about to say exactly what you said...!!! ^^^^^^^^^^^^^^^^^

i did that recently on one of my jobs

telectrix · Jun 10, 2012

what software did you use to do that drawing.

JUD · Jun 10, 2012

Put the FCU where I have indicated. This will cover the bathroom and En-suite.

Guitarist · Jun 10, 2012

So many ways of doing it

Strima · Jun 10, 2012

For me I would place FCU's where the red rings are, can't be bothered with gucci programmes to do this stuff:

Just splits the circuits down a little.

On the main bathroom side, single line to FCU then split to fan and switch.

Many ways to do it but with out knowing how accessible your wiring is it's next to impossible to say.

DIYBlues · Jun 10, 2012

telectrix said:
what software did you use to do that drawing.

Software is called Paint which you will find on all XP, Vista and Win 7 Operating systems under All Programes > Accessories

Thanks for all the replies

Top Cat · Jun 10, 2012

DIYBlues said:
Software is called Paint which you will find on all XP, Vista and Win 7 Operating systems under All Programes > Accessories

Thanks for all the replies

Just for Tel. Paint is a software package on your computer, it's not what you put on a brush!Lol

nickblake · Jun 11, 2012

Guitarist said:
If you install a 3A MCB in the CU you won't need the FCU. Otherwise, you could just install a 3A FCU where the lighting circuit feeds the bathroom and another where it feeds the en-suite.

was going to mention that but some time you cant get a 3 amp mcb so depends on the CDU make

3 Core and Earth plus a FCU help!!

DIYBlues

spark 68

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nickblake

DIYBlues

nickblake

Guitarist

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DurhamSparky

telectrix

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JUD

Guitarist

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Strima

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DIYBlues

Top Cat

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nickblake

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