B and B+ Type R.C.D.s.

Back in the days of yore. Ok then just a few years back. We would all be happy to install using a consumer unit with rewireable fuses. Then a few used High Breaking Capacity fuses and later on we called them High Rupturing Capacity fuses. Then we used MCBs type I II II then they changed to B C D , then we started to add an RCD . wowee. for all of the foregone we were always as happy as a Sandboy called Larry. Now we worry about RCD types A AC F yada yada yadda . 

Do we feel safer ? Oh lets add SPDs too, No I  am not going any further

That’s what they do in France, split the circuits between Type AC and Type A RCDs, but as there’s not really a difference in price it is probably easier to go all Type A.

Sparkingchip: 
 

That’s what they do in France, split the circuits between Type AC and Type A RCDs, but as there’s not really a difference in price it is probably easier to go all Type A.

And if you need a type F or B as well? Then what?

Z.

This week, I was supposed to be installing the electrics for my self-build chum's boiler, but the plumber has covid so it has to wait. ?

The manufacturer's instructions specify a type A RCD, which is all very well, but the split board (Schneider) has type AC ones. I have warned matey that he might get “nuisance” tripping, perhaps because the pump will have a VFD these days. Problem is that the type A RCDs are difficult to find.

It needs a new consumer unit If you cannot retrofit a Type A RCD.

Schneider do make the appropriate type A RCDs, but they are not easy to find (in UK) and remember that matey has such short arms and long pockets that he makes a Yorkshireman appear to be positively philanthropic. If he can get away with the existing type AC, he will do so.

Chris Pearson: 
 

Schneider do make the appropriate type A RCDs, but they are not easy to find (in UK) and remember that matey has such short arms and long pockets that he makes a Yorkshireman appear to be positively philanthropic. If he can get away with the existing type AC, he will do so.

Fleabay has some MK 100 Amp type As at a reasonable cost.

Z.

ebee: 
 

Back in the days of yore. Ok then just a few years back. We would all be happy to install using a consumer unit with rewireable fuses. Then a few used High Breaking Capacity fuses and later on we called them High Rupturing Capacity fuses. Then we used MCBs type I II II then they changed to B C D , then we started to add an RCD . wowee. for all of the foregone we were always as happy as a Sandboy called Larry. Now we worry about RCD types A AC F yada yada yadda . 

Do we feel safer ? Oh lets add SPDs too, No I  am not going any further

Some of my customers still have hot wire fuses in their fuse boxes, not many, but some.

Very few still have B.S. 1361 cartridge fuses fitted. Some do though. They were an upgrade years ago, and in some council houses were supposed to prevent the fitting of oversized fuse wire. 

Then M.C.B.s became popular.

With Wylex fuse boards all could be fitted in sequence to the same board over time, thus saving labour and materials.

Now the situation has turned into a big money making circus.

Wylex Fusebox - Replacing fuses with plug in MCBs is a waste of money - Bing video

Z.

You should try working on my jobs!

I am supposed to be having a week off, but went and did a “Currys refused to fit” cooker replacement today for a lady in her late nineties. 

Last week I fitted an additional consumer unit to supply two lights and two socket outlets that I ran new circuits for, because the existing installation is completely unfit for purpose after fifty six years and I could not make any new connections to it.

I also installed an earth rod last week in another house that has not had a means of earthing for over forty years and so it goes on.

If people want new modern appliances in their homes they are going to have to bite the bullet and have their existing installations upgraded or an additional consumer unit installed.

Sparkingchip: 
 

You should try working on my jobs!

I am supposed to be having a week off, but went and did a “Currys refused to fit” cooker replacement today for a lady in her late nineties. 

Last week I fitted an additional consumer unit to supply two lights and two socket outlets that I ran new circuits for, because the existing installation is completely unfit for purpose after fifty six years and I could not make any new connections to it.

I also installed an earth rod last week in another house that has not had a means of earthing for over forty years and so it goes on.

If people want new modern appliances in their homes they are going to have to bite the bullet and have their existing installations upgraded or an additional consumer unit installed.

Are these findings in the Valleys where time stands still?

Z.