max lenght of radial and ring for sockets?
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Theorysparky
Domestic Electrician
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ring 100m2
radial in 2.5mm 50m2 20a
radial in 4mm 75m2 30a or 32a
thats floor area
17th page 363
radial in 2.5mm 50m2 20a
radial in 4mm 75m2 30a or 32a
thats floor area
17th page 363
Don't know about your memory? But as long as the volt drop isn't more than 5 % of the design current it should be OK. Look in the regs book all tables for v drop/Amp/Metre are in there just need to know what type of cable you are using.Table 12a for volt drop also states that if over 100 metres it can be increased by 0.005% for the cable over 100 metres but should not increase more than 5%. CJS 
There is NO "maximum length"!
100 square metres of floor space, as posted above.
50 or 75 square metres of floor space; as Theo already stated.
Is it? Where do you get THAT gem of information from?????
AFAIAC, radials rule. I`ll use a ring for the kitchen / utility sockets; but, on a typical domestic, EVERYTHING else will be radial.
By having radials instead of rings????????
Explain please!
You seem to be suggesting that the 20 A radial will trip before a 32A ring?
Define "trip"?
come to that..... define "well before"??? Well before what????
Sorry, but the post does not appear to make any sense. If you can explain yourself, we may be able to shed some light on the matter.
AH!!!!!! You`re talking about circuit overloading. - not "tripping"!
Yes, a 20A radial will not hold 6Kw.
But, a 32A 4.0mm radial will!!!!!!!
As I seem to remember saying, we`re talking about the "typical" domestic.
They`ve got thermostatic rads in every room - where are they going to put 6KW of heating?????????
Besides the point - YOU asked why rings were preferred.
I answered.
Nothing at all to do with "nuisance tripping", which is NOT an overload phenomenon.
Think I`ll go to bed now
Define "trip"?
come to that..... define "well before"??? Well before what????
Sorry, but the post does not appear to make any sense. If you can explain yourself, we may be able to shed some light on the matter.
AH!!!!!! You`re talking about circuit overloading. - not "tripping"!
Yes, a 20A radial will not hold 6Kw.
But, a 32A 4.0mm radial will!!!!!!!
As I seem to remember saying, we`re talking about the "typical" domestic.
They`ve got thermostatic rads in every room - where are they going to put 6KW of heating?????????
Besides the point - YOU asked why rings were preferred.
I answered.
Nothing at all to do with "nuisance tripping", which is NOT an overload phenomenon.
Think I`ll go to bed now
Why the frig not???????????????
And - you repliede to my (unedited) post, which was in answer to your (unedited) post.
Then you edited your post, adding the bit about the heaters.
THEN I edited my reply, to reference it.
Then I got peed off with the argumentative attitude, and left the premises!
( ARE you WUM)?
18A????????
Which book, page & table does that come from please?
I need to know urgently, as I`ve spent 20+ years being wrong.
Which book, page & table does that come from please?
I need to know urgently, as I`ve spent 20+ years being wrong.
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what fool would design a circuit if they new the typical load was going to exceed the fuse rating???
bit like saying....
And a 32A ring TRIP with 10.5kw shower wired in!!!
BUT a 50A RADIAL wouldn't???????
of no sensible use whatsoever?
You seem to be missing some very BASIC points of circuit design here bud...
Note to "lostit":
You have.
Before posting "facts & figures", I suggest you make CERTAIN you`re correct.
Which, BTW, you aren`t in this case.
Mr. Pig: ignore Mr. "it"`s post on 2.5 capacity - it`s complete nonsense!
You have.
Before posting "facts & figures", I suggest you make CERTAIN you`re correct.
Which, BTW, you aren`t in this case.
Mr. Pig: ignore Mr. "it"`s post on 2.5 capacity - it`s complete nonsense!
Seems to missing his medication, too mate.what fool would design a circuit if they new the typical load was going to exceed the fuse rating???bit like saying....
And a 32A ring TRIP with 10.5kw shower wired in!!!
BUT a 50A RADIAL wouldn't???????
of no sensible use whatsoever?
You seem to be missing some very BASIC points of circuit design here bud...
18A on a 2.5mm, don`t you know.????
Wonder how that works with the " standard final circuits" in OSG???(2.5/20) as I recall?????
Think we`re being wound up - or else this guy is a plumber
i would like to think you don't need to get technically involved with a simplewhat fool would design a circuit if they new the typical load was going to exceed the fuse rating???bit like saying....
And a 32A ring TRIP with 10.5kw shower wired in!!!
BUT a 50A RADIAL wouldn't???????
of no sensible use whatsoever?
You seem to be missing some very BASIC points of circuit design here bud...
choice of wether you wire a ring or a radial for some socket outlets.
how can you place typical on socket outlets! you never know what is going to be plugged in? 2 3kw heaters or 2 3kw loads is not out of the ordinary?
but if you'd wired that circuit in a 20a radial it would trip out on overload but be fine if you'd wired it in a ring on a 32a ?
