Shower circuit design.

Chint M.C.B. test.

Sparkingchip: 
 

Is the consumer unit an all metal enclosure type?

Z.

Zoomup: 
Chint M.C.B. test.

If the objection to Chint is related to its being a Chinese company, that seems unfair. So many other companies make their goods in China. My trusty old Lenovo laptop, my iPad, and my ancient iPhone were all made there.

Fairly obviously, the latest technology requires the latest factories and it should be no surprise that they come to be located where land and labour are cheap.

Back to basics,  the first thing to do in a circuit design calculation is to determine the design current Ib. 

As set out in the IET Design Guide. 

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Sparkingchip: 
 

My only issue with Chint is that I could not find a wholesaler who keep their MCBs in stock, Screwfix supply them, but they don’t keep them in stock with them only being available after 24-48 hours.

If Chint and Screwfix ensured there was stock in each branch I would have completely resolved all the issues on Friday and there would not now be unresolved issues to deal with.

I actually have a better stock of 40 amp circuit protective devices in my van than any wholesaler in the United Kingdom have in their warehouse, except a some of the specialist second hand suppliers such as Willrose, but I didn’t have Chint so I have ordered three as  “just in case” van stock.

 

So what is really wrong with fitting a different make of M.C.B. and slightly adjusting a bus-bar finger to suit? Or putting the new device at the end of a shorter bus-bar and linking it by a short wire tail/link? Isn't that just site engineering?  A better quality make of M.C.B. than Chint would be a benefit.

 

Z.

Regulation 536.4.203 (2nd para)?

Whilst driving to the job on Friday I listened to the Wake Up To Money podcasts on the BBC Iplayer, one of the subjects of discussion was the closure of the Honda car factory after thirty five years with around 4,500 people losing their jobs. Then then followed a general discussion about  Japanese car manufacturers. Apparently Toyota are doing far better than their rivals because they switched from “Just in time” deliveries to a “Just in case“ system which means they actually carry some stock to avoid delivery issues.

I am finding I am having to to do the same, because wholesalers and firms like Screwfix are operating a “A day or two too late” delivery system, I am sure this is leading to some people “making things fit” to get things completed rather than doing a proper job with the correct parts.

So I’m at the point of doubling some stock so I can replenish the van stock when I get home in the evening to save messing about, I am not talking about a big amount of stock, it’s variety rather than quantity, particularly with MCBs that are only worth a couple or three quid each.

But having said that I have seven good electricians under rating MCBs and RCBOs by design.

https://www.swindonadvertiser.co.uk/news/19478082.end-era-swindon-bids-farewell-honda-factory-closes-35-years-town/

Sparkingchip: 
https://www.swindonadvertiser.co.uk/news/19478082.end-era-swindon-bids-farewell-honda-factory-closes-35-years-town/

I just love thread drift. It's presumably along the same lines of the strategy of quitting F1.

Many years ago a chum told me to get a Honda lawn mower 'cos they always start first pull. It has been a very sound purchase. However, are we going to see petrol lawn mowers outlawed any time soon in favour of battery ones? And if so, will there be any faff with their charging points? I imagine not because they would be classified with invalid carriages i.a.w. 722.1(ii).

The thread drift is: one of the reasons electricians lower their standards by using incorrect MCBs is because wholesalers do not carry adequate stock locally.

Chris Pearson: 

I just love thread drift. It's presumably along the same lines of the strategy of quitting F1.

Many years ago a chum told me to get a Honda lawn mower 'cos they always start first pull. It has been a very sound purchase. However, are we going to see petrol lawn mowers outlawed any time soon in favour of battery ones? And if so, will there be any faff with their charging points? I imagine not because they would be classified with invalid carriages i.a.w. 722.1(ii).

Well in the US a phase out of petrol garden machines has some serious support

example   

And bans like that are coming in or already in place in parts of California it seems.   It may be that the EU follows suit. then it will be irrelevant if we do or not - name a UK maker of engines after all.

mapj1: 
name a UK maker of engines after all.

Gosh, when did we last have one? Suffolk Punch?

I have Honda (Japanese, obviously), Briggs & Stratton (USA), Stihl (German) and Huscvarna (Swedish) equipment. Does the UK not make anything?

I might add that I considered buying a Stihl battery-powered hedge trimmer because I wanted a light-weight one. Not only was it as heavy as a petrol one, it was as expensive.

I bought a mains-powered one, but it has been a bit of a disappointment.