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Confirmed, building control will accept that. You will probably need to document the reading on a PIR certificate and simply write the limitations as "inspection of earthing arrangements only"

It probably will be OK - meaning that the flex should comfortably offer a current carrying capacity of 5 amps. Though if the lamps are 100 watts each or less then you could use a 1 or 2 amp fuse to protect the cable. My answers assume that you are running a short length of flex not buried...

If I have understood correctly then you want a PIR(inc dusk/dawn) sensor to switch on soffit lights? You also want to be able to switch them on with a manual (existing) switch? You want to use X10. If you want to use X10 then you can just use a standard PIR(incl dusk/dawn) and wire the...

EIC and building control notification

Bernard, as others have indicated, you can use a two/three wire calibrated loop impedance tester with one lead connected to phase and the other connected just to the earth rod (ensuring no other parallel connections) this indicates the AC impedance in the loop formed from: earth rod>mass of...

The electrician needs to provide you with valid, accurate, scientific reasons for the symptoms that you describe. The most likely reason is that you have a significant potential difference (a voltage) between your earth circuit and true ground (the ground you walk on, the walls you touch) Why...

Local bonding is fine provided the "metal water pipe" is really all copper/metal (not plastic somewhere along the line) These direct electrode units can develop high earth leakage currents so the main CPC is very important too but I don't like to rely on that alone (I always worry about someone...

This probably is an earthing issue but that is a very general description. This really is a job for an experienced, registered (www.competentperson.co.uk) electrician. Depending upon your earthing arrangements: TT system: earth rod TN-S system: separate earth conductor provided by your...

Martin, if you perform a standard insulation test at 500V what insulation resistance reading so you get?

[/url] I see that you changed bulb but is it a 60w low energy bulb (possibly a compact fluorescent bulb) or is it an incandescent bulb(with a wire filament)? Low energy, non-dimmable bulbs will flicker when dimmed.

Martin, I know nothing about PAT testing, not something we have taken on as a business or trained for. But I assume the 0.75mA is a leakage current? If it is then it seems to me that it might be related to the washing machine heater element and quite typical for a machine which might be a...

A one for one rewire with minor adaptations may be classed as maintenance but a rewire, including new circuits for new (and importantly approved) alterations are zero rated for VAT.

Yes we ran into such a problem when the kitchen GU10s were changed from halogen to LED. For the kitchen circuits (4 of them with 4 lamps/circuit) we changed the TRIACs for dry contact relays. We had done past projects with PLCs but instead we used 2X Velleman(VM142) PIC project boards with a...

Ah yes, that's an excellent way to do it. We have done such things in the recent past with a custom built controller. We used a bank of TRIACs to actually switch the lights (not to fade them) and 12 volts DC switch signals feeding opto-isolated relays in the controller to "gate" the TRIACs...

That's interesting. We have a similar challenge on a listed 16th century manor house next month. Are you using the 12 core instead of multiple T&Es?

Yes, there was a time when I would have "blindly" bonded everything in sight though I was not an "electrician" as such at that time. Up until around 20 years ago I worked in the semiconductor industry where great attention is paid to "earthing" and equipotential zones because semiconductor...

I suspect (but do not know for sure) that it is an electronic SELV PSU. Most do have some electronics in them anyway (and not to say that a xfrmer is not electronic) but all have to assure isolation between primary and secondary potentials so even an "all electronic" SELV PSU needs a method of...

Ah right, in that case no problem with terminals but yes it is huge!! and let's hope its not for wiring the light under a leaking shower :lol: