I didn't mean that the FCU on the ring would blow, I'm saying the house RCD will trip and you'll lose all power to the house and garage. A faulty appliance in the garage or water ingress or earth leakage etc will trip the house RCD which will be very irritating to family members. Also if you have a high load in the garage (but not so high as to trip the garage MCB) and people in the house are using the ring then that would make the MCB on the ring trip.
Cable leaving house to underground.
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I didn't mean that the FCU on the ring would blow, I'm saying the house RCD will trip and you'll lose all power to the house and garage. A faulty appliance in the garage or water ingress or earth leakage etc will trip the house RCD which will be very irritating to family members. Also if you have a high load in the garage (but not so high as to trip the garage MCB) and people in the house are using the ring then that would make the MCB on the ring trip.
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An mcb's prime function is to check current overload. The 16A mcb will trip before the 20A. But this was to make a poor job better, but not the ideal (which is the garage cable back to the CU). The setup was far better than what was before, for sure.
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Not necessarily. As I have told you twice look up the curves.
Of course it will. That is the case with all installations with one or two RCDs. The only way to ensure all faults or overloads are contained in the garage is not have the ring on an RCD or rcbo, having the garage circuits on RCBOs/RCD. But the house is then less protected, which is undesirable.
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Of course you do. You are assuming I knew nothing about mcb types. Wrong assumption.
Fulham
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There are lots of other options, such as not spurring from the ring (but I appreciate that's probably beyond the changes you are looking to make at the moment).
If you are drawing 15A in the garage and 15A on the ring then the ring MCB will trip before the garage. It depends how the ring is being used whilst you are working in the garage. The garage MCB won't always trip first just because it's rated lower.
This guy is just here to wind us up.
Of course - obvious. Draw 15A in the garage and 16A on the rest of the radial then the 20A in the main CU will trip.
I did actually split a ring into two radials with an explanation on how it was done.
There is also a hypothetical garage spur off a ring, and the ideal way of doing it - this has created much confusion. But thanks to Sunray, again, that was sorted,
Oh boy. Last night I actually thought 'All we need now is for Winston to join in and introduce even more carp into the thread', lo and behold I find Winston has joined in and introduced his load of...
Hang on Winston has added some very good comments, well done, and it's nice to be able to say that.
However having seen the rest of the replies since my last post I'm totally convinced HW is only here for a wind-up, either that or a stupid botcher, although that is an insult to the trade of botching.
Hang on Winston has added some very good comments, well done, and it's nice to be able to say that.
It's debatable, I do a fair amount of temporary work and it's quite common to have several closely related MCBs in line. In the event of a short circuit fault I've had a 10, 16, 20 & 32A all blow, equally on an overload I've known a B25 trip at the load before the C16 at the source, from the curves it shouldn't have happened that way.
In which case it should have been reported to their scheme provider as it is a useless set-up, albeit not dangerous.
However having seen the rest of the replies since my last post I'm totally convinced HW is only here for a wind-up, either that or a stupid botcher, although that is an insult to the trade of botching.
Should say try to wind us up. You post nonsense and you refuse to give any details as to what you are trying to do. I really am not wound up.
A pleasant change,
All you can do is put in the correct mcb type values. If they trip out of order than t may be the mcb which is at fault.
I did complain to the builder (Taylor Woodrow) who did not want to know. They said it conforms to regs and is totally safe. I pointed out that the garage fuse is 16A which is useless as the FSU is 13A. Nothing from them. The only way to get them to put it right was a dodgy way via lawyers. If I lose I pay a big lawyers bill. I thought it is best I improve it myself.
I am doing is just answering the posts - no more. Some responses are odd for sure. Please show me where I have botched anything - one of your professionals was advocating a 4mm spur cable off a 2.5mm ring with socket and FCU off it. Read it, it is there, I never made it up. Look at some of the replies - these are professionals? My oh my!
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Another one. <sigh> His value to the thread topic has been zero. More noise.
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