One for Adam!

Dec 14, 2020 Last reply: 5 years ago 14 Replies

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Ta. Just watched a bit of it before I set off to work.

If it was for adam, and you are not going to indicate here what they are, then why not send them to him by email. Thus you are obviously lying in the subject line, you want people out here tto click links for which they have no idea of the content, which in this day and age would most of the time be folly and posssibly dangerous to the health of the computer. Brian

It's obvious they're youtube links, so the danger to the computer is close to zero

The content could indeed be anything (subject to youtube policies) in this case it's about a consumer unit that caught fire (one from the electrician that had to replace it, and another from bigclive tearing it down for clues).

Hence the reason for 'Amendment3' ?? requiring all new consumer units to be metal cased, although there is still the issue of how you seal all the knockouts without also causing local overheating of the cables where they exit the box. Is there some special intumescent gooey stuff for doing this ?

Make sure your nuts are done up tight seems to be the message.

Hmm. toasty.

Even more interesting is the link over to the right -

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"AFDD's" aka 421.1.7

A brace of ARM core powered circuit boards inside an MCB !!.

Does this mean plug-in mechanical timers will be unusable ?. The one I use to turn the porch CFD light on/off doesn't seem to sharply switch it off but there a second or buzz.

ARW snipped-for-privacy@blueyonder.co.uk> wrote in news:hBYBH.1072330 $ snipped-for-privacy@fx37.ams:

Any view on the quality of the FuseBox brand of CUs fitted as replacement in the second vid and how they fit in around the rest of the pack, Contactum, Wylex, BG etc.

Hadn't heard of them before.

They seem to be a relative newcomer (unless CP Electric have been around under their own name for years?)

They look reasonable, but the only reason I've noticed them is that several sparkys on youtube seem to have been supplied with them FoC for demo/promo purposes ...

Andy Burns snipped-for-privacy@andyburns.uk wrote in news: snipped-for-privacy@mid.individual.net:

CU change & rewire is on the way here shortly hence why I am asking. Hager would be lovely but cost not really justifiable, BG phaps a bit too cheap.

Some discussion about them on the IET forums (I think it was) and there was some concern about the whether the new company would last, leading to support/spares issues. A main distibutor stepped in and supported the company, MD (personally known), quality and value for money suggesting that the nay sayers would regret not taking them up whilst they were on value pricing.

The installation using one on the fire replacement vid up thread made it look good, roomy and easy to configure but the guy was an obvious pro and I am not. He was doing a full RCBO install as will I.

are Hagar that expensive? an 20-way CU with just the main switch is about £65, their RCBOs about £24 ea, same sort of price as screwfix for BG ones.

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Andy Burns snipped-for-privacy@andyburns.uk wrote in news: snipped-for-privacy@mid.individual.net:

Fusebox 20W + full fill RCBO type A:

50.41 + 20 x 18.60 = 422.41

Hager: 20W + full fill RCBO type A:

64.87 + 20 x 24.70 = 558.87

Small beer diff for what is essentially my lifetime house so thx for the reminder not to over economise.

Not sure if I need "Hager Design 30 Amendement 3" CU at +24.34 but more likely to go for Hager flush CU at +20.68 as that suits my install better.

Strict adherence to regs editions is not too important to me, just doing a good job in the spirit of regs.

I would allow lots of extra space for SPDs and AFDDs which are suggested now and may be required in the future.

If AFDD/RCBO in future are double-width you need 50% fill/ 50% free which is quite an over-provision.

Owain

Fitting RCBOs now is good, you'll save 4 ways from the lack of dual RCDs, you can choose to not bother with SPD, and nobody's likely to come along and insist in retrofitting AFDDs in future.

They're already available single module, bargain price.

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If you look at David Savery or John Ward's videos about how difficult it is to get an arc to trip these things, especially on low current circuits you wonder why they even make a 6A version?

Owain Lastname snipped-for-privacy@gowanhill.com wrote in news: snipped-for-privacy@googlegroups.com:

A while back I did look at poss future SPD requirements and at the time it appeared to only likely to be mandated for overhead feeds in the sticks with the major threat being surges induced by lghtng.

I live in a major conurb where the HV feeds come in underground so I figured I was pretty safe[1] and not likely to be required to fit, certainly not retrospectively. Been here for a while, so far so good, fingers crossed.

Also not that impressed with the technology, looked like some MOVs jammed in a case and I have little faith in them especially if exposed to a big surge from a low impedance source.

The term AFFD was new to me, omg more hand holding, think I'll pass.

20 way should give me a fair bit of headroom but I will be going a bit over the top on sep dedicated RCBOs eg. for fridge/freezer, boiler etc [1] perhaps other than a substation going pop

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