max lenght of radial and ring for sockets?

[moonpig]

Mr. Pig: ignore Mr. "it"`s post on 2.5 capacity - it`s complete nonsense!

Cheers KME, but whos this Mr pig character? :| :^O , is my old man on this forum to:^O:^O, well i hope not because we dont get on.

 

[Lee321]

Seems to missing his medication, too mate.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

did you read my username its no wind up

 

[SPECIAL LOCATION]

a 2.5mm will only carry 18amps so it could be overloaded

erm NO..

in certain installation methods the capacity drops down but....

TRY page 282

Inst method C = 27A

method 100 = 21A

method 102 = 21A

method A = 20A

thats 70deg, thermoplastic & sheathed flat cable with CPC..

or 2.5mm T&E as we call it

Think you need to get back to the current regs m8!

 

[Lee321]

erm NO..in certain installation methods the capacity drops down but....

TRY page 282

Inst method C = 27A

method 100 = 21A

method 102 = 21A

method A = 20A

thats 70deg, thermoplastic & sheathed flat cable with CPC..

or 2.5mm T&E as we call it

Think you need to get back to the current regs m8!

tell me about it. thats what 5years of installing 4x4 trunking for every single working hour of those 5 does to ya lol

 

[SPECIAL LOCATION]

i would like to think you don't need to get technically involved with a simplechoice 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 ?

Well on that theory.. you cant have rings either..

Because.

There is NO limit to the number of socket outlets you can put on a ring (or radial for that matter) ..

so a ring with 40 socket outlets all with "your 3kw" heaters plugged in

40 x 3000w = 120,000watts = 521amps..

oh eck 32a fuse blown!!!

This is where as I was pointing out.. YOU design your circuit..

based on LOAD, CABLE sizes, FUSE rating, max volt drop, max Zs, etc.. etc.. etc...

and take in DIVERSITY etc..

to ensure..

IF some plonker puts too much load on the cable..

The fuse trips first!!

not the melted cable!

 

[SPECIAL LOCATION]

tell me about it. thats what 5years of installing 4x4 trunking for every single working hour of those 5 does to ya lol

so why suddenly pick a random 18a figure out of the air...

bloke down the pub??

friend of a friend?

get the current book & have a read..

its all in there!

You must be careful

typing apparent "facts" that are wrong..

because there are a lot of young sparks learning who read these posts..

& we don't want to miss-lead anyone!

if you are in doubt make it clear you are asking.. NOT stating!

SL

 

[kme]

so why suddenly pick a random 18a figure out of the air...bloke down the pub??

friend of a friend?

get the current book & have a read..

its all in there!

You must be careful

typing apparent "facts" that are wrong..

because there are a lot of young sparks learning who read these posts..

& we don't want to miss-lead anyone!

if you are in doubt make it clear you are asking.. NOT stating!

SL

Thanks SL:x

You`re obviously more eloquent then me tonight -

As I posted elsewhere - I`se a bit cranky, so don`t take offence if i`m short tempered.

You managed (as you usually can) to put my feelings into a polite response. Unfortunately, i`m not up for that tonight

 

[moonpig]

Ah well as peace and tranquility seems to have been restored in electrician forum land i believe its time for me to get some beauty sleep:z, well in fairness we all know i dont need any beauty sleep but i do need to recharge the batteries so i can keep fighting the good fight tommorrow :^O .

Now all i need to do to comitt the perfect crime is go to bed without waking mrs moonpig, she has already told me a couple of times today and in her words i am skating on thin ice:_|.

Goodnight all, and peace out:x:x:x

 

[Lee321]

so why suddenly pick a random 18a figure out of the air...bloke down the pub??

friend of a friend?

get the current book & have a read..

its all in there!

You must be careful

typing apparent "facts" that are wrong..

because there are a lot of young sparks learning who read these posts..

& we don't want to miss-lead anyone!

if you are in doubt make it clear you are asking.. NOT stating!

SL

i had a bollockin on another post already BlushingBlushing

i'm not here or ever intended to make statements or facts

apologies if taken that way

 

[kme]

Ah well as peace and tranquility seems to have been restored in electrician forum land i believe its time for me to get some beauty sleep:z, well in fairness we all know i dont need any beauty sleep but i do need to recharge the batteries so i can keep fighting the good fight tommorrow :^O .Now all i need to do to comitt the perfect crime is go to bed without waking mrs moonpig, she has already told me a couple of times today and in her words i am skating on thin ice:_|.

Goodnight all, and peace out:x:x:x

G`night "moonie"?

 

[kme]

i had a bollockin on another post already BlushingBlushingi'm not here or ever intended to make statements or facts

apologies if taken that way

Then accepted (by me, anyway).

Would still be interested to know where 18A figure comes from?

I can`t think of ANY combination of factors which provides that figure????

anyway - by the by - your original question was (correctly) answered by Theo - yes?

 

[Lee321]

Then accepted (by me, anyway). Would still be interested to know where 18A figure comes from?

I can`t think of ANY combination of factors which provides that figure????

anyway - by the by - your original question was (correctly) answered by Theo - yes?

yeah

 

[SPECIAL LOCATION]

i had a bollockin on another post already BlushingBlushingi'm not here or ever intended to make statements or facts

apologies if taken that way

Applaud Smiley :x

Don't do boll-o-kins on here bud!

[well admins & moderators can... they've got a big stick in the corner:O]

just need to be sure that some of the yung-us, new-sparks, trainees etc..

don't get pushed up a cul-de-sac with naff info that is either wrong or half right!

which is why I do try and post references where possible to give anyone interested

a chance to go and get a proper opinion from the official fan-club books!

rather than just read what we all spout out.. just in case we have made a mistake as well...

golden rule...

If you can justify your point.. then back it up & we can all learn together!

 

[steptoe]

Then accepted (by me, anyway). Would still be interested to know where 18A figure comes from?

I can`t think of ANY combination of factors which provides that figure????

anyway - by the by - your original question was (correctly) answered by Theo - yes?

it is refered to somewhere KME, dont know where tho, one of the apprentices asked me about it last week, maybe its a college thing?????

 

[kme]

Thanks Mr. Toe.

Guys - It`s been a blast, but I`se off for kippies now.

G` night John-boy

 

[Theorysparky]

ive got to stay up later !!!!!

i miss all the fun

not too happy about the mentioning of pigs

 

[Apache]

ive got to stay up later !!!!!i miss all the fun

not too happy about the mentioning of pigs

I went to bed 1.15 and still missed all the fun! they're talking about moonpig. Great username, good birthday cards too.............

 

[Theorysparky]

I went to bed 1.15 and still missed all the fun! they're talking about moonpig. Great username, good birthday cards too.............

Apache

i have pigs in my cave(office) at the end of my garden

kids thought it would be funny to buy them (not real of course !)

hence my remark

 

[binky]

ring 100m2radial in 2.5mm 50m2 20a

radial in 4mm 75m2 30a or 32a

thats floor area

17th page 363

I think if you read it properly these figures are 'a rule of thumb' (max recommended floor area for an unlimited number of sockets according to 16th). The ultimate circuit definer is voltage drop (Zs) which is affected by length of circuit and number of accesories fitted causing a resistance at each termination.

This page of regs also shows 20A radial circuit wired in 2.5mm

 

[kme]

I think if you read it properly these figures are 'a rule of thumb' (max recommended floor area for an unlimited number of sockets according to 16th). The ultimate circuit definer is voltage drop (Zs) which is affected by length of circuit and number of accesories fitted causing a resistance at each termination.This page of regs also shows 20A radial circuit wired in 2.5mm

Maybe the wording there, mate; but you "appear" to call volt drop Zs ??

I don`t think anyone suggested there was a maximum number of sockets; just a floor area.

Just to clarify: The Zs is the earth fault loop impedance; NOT the volt drop.

Sorry Binky

KME