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Yep - that's the ticket!

Thanks Slips - makes sense! I had this at  a business club breakfast meeting where I suspect a fire alarm wallah was trying to frighten off a mere electrician from dabbling in fire alarm panels. My take is that I won't design anything - but happy to fix and replace!

I've been told that there is some problem with new legislation requiring 3rd party certification of fire alarm panels - and because of this a lot of manufacturers are withdrawing a lot of their panels (from my own experience you can't get a Rafiki Twinflex 4 Zone Control Panel from most...

Just a thought - how did you do R1 + R2? Short at pillar end or at streetlamp end? If shorted at the streetlamp end then you would have to get good contact to different terminals to the Zs measurement - so Binky's point of terminal connection comes into play.

Was impressed how it coped with the insulated wall. Can see myself modifying a dead loudspeaker in the future!

Hi - just been dealing with a 3 phase dual rate digital meter - and the control wire for E7 is switched to neutral to activate the E7 contactor. Surely this is not to BS7671!  Anyone had any experience of this?

Lidl was doing a nice little adaptor at £4.99 - rarely used - but when you need it it's invaluable (perhaps that's a bit OTT - it's well worth 4.99 though)!

I think what got me is that is was 2 out of 2 failures within 3 months of each other - and getting out of replacing one on a technicality - nothing to do with the fault - and threating my poor old dear with a big bill! Not impressed! Fair comment - you know me well - but a lot of expensive...

The Denmans ones are pretty good - but Dimplex have a strange returns policy. If you buy the heater and find it has a faulty component or panel the supplier is bypassed completely and you have to deal with Dimplex directly. I've had this with two Designa showers (Dimplex group) I  fitted...

I had a thing today with a Hamilton 45A isolator - switch on and you could hear arcing within the switch. Quality control is not what it should be - but on the other hand accessories are comparatively cheap compared to years ago. Thinking about MCBs - we never test the tripping of these - it's...

Don't give up - what you say is right - but completely misplaced in the context of this forum! We've all C***** up by compacency etc at some time. You will at some time! Point out what should have been done by all means - but the tone of what you posted was out of order! Just grow up and...

Bloody right I haven't invited him! If it was whiskey it might be different!

What you say makes perfect sense - but a touch self rightious for my taste!. As I'm a one man band this probably wouldn't happen to me -- but we need to talk about these things rather than brush them under the carpet. We've all done things that we're not proud of - often to finish a job when...

Love it! Sorry - I edited the post as I engaged my brain!! Friday night is whisky night - I won't do it again!

Blimey - love this forum - learnt something new! Thinking about it - as soon as a very small resistive load is connected the cable capacitance would be completely swamped. If the RCD is passing trip times with cables connected surely this is worst case?

Thanks - I've always appreciated the 'Frying Tonight' issue - but when I've done overall insulation tests as a health check before fitting a new CU (generally at 250v until I know what's going on with L+N connected) I've found that there is a low impedance to earth when there is an RCD fused...

I always thought that RCD sockets worked slightly differently to a standard RCD as when the earth is connected there is a low impedance to earth - hence instructions to disconnect when doing insulation tests. My concern is that the RCD socket may make the tripping threshold of the upstream RCD...

So seriously - if you've got all chandeliers in the house do you take them all off? Multiple downlights - do you check them all to find last point for R1+R2 and risk damaging the ceiling? If you've got 3 lighting cables coming into an MCB do you find the last point for each leg? I can see where...

Delivering value at a fair price - arguably it is a race!  If the house and CU are in good condition then 4 hours is certainly feasible. What is your definition of properly? 100% testing is the only proper test - and even then problems can be created by re-installing. So 50%? 10%? Check...

Yes - food for thought there - but I like to keep my costings simple. I like to get £25 on hour for honest work - which is pretty good round these parts. If I was employed I would be expected to get to my place of employment - not included within my tax allowances. As a self employed...