Garden Electrics - Advice Needed

Jun 03, 2005 6 Replies

Hi -


I'd like to fit an outside electrical socket at my house.



I've had a look at a number of parts and am planning on buying a MK 1 unswitched outside socket, a few meters of 2.5mm armoured cable glands, cable pleats....



I'd like to run these down the side of the house and straight into th garage where the box housing the trip switches are (a wylex unit). I' like to take this cable directly into the wylex unit via a separat trip (I have two free holes).



I'm confused as to what I should fit in the wylex box; I've read abou MCB's and RCBO's and am none the wiser. Can anyone offer an opinion o type and rating?



The outside socket will be used for the usual garden tools (mower blower etc).



Regards, Julian


-- JulianFS


The socket needs to have a 30mA trip RCD, and for a single socket on

2.5mm cable a 16A MCB would be fine.

(You did not say how far a "few meters" of cable will be, but if we are talking less than 30 I can't see any real problems for a single socket feed).

Since it is better to not share a household RCD with a feed to an exterior socket (the possibility of it getting damp makes it more likely to cause unwated spurious trips), a RCBO (i.e. combined RCD and MCB) would be the most elegant solution if you can fit it in your CU. Many of these are two modules wide but since you have two spare ways that ought to be OK. You can also get single module width ones - but they do not fit all CUs due to their extra height.

As SWA cable isn't the easiest of stuff to terminate I'd use a separate stand alone RCD like TLC CM 4904 in a surface mount box then wire back to the MCB in TW&E.

On Sat, 4 Jun 2005 10:25:38 +0100, "ElectriciansForum" strung together this:

Put a this in a thread on your forum, f*ck off.

I'd use a 16A/30mA RCBO. I would also use a box to change from the SWA to T&E outside of the consumer unit, unless the consumer unit is particularly spacious inside.

Christian.

BTW, in addition to the other comments, remember you need waterproof glands for outdoors. In the sheds, the non-waterproof ones seem to be easier to find so you might have to pop along to your local electrical wholesaler who will certainly have them.

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