length of cable runs

[i=p/u]

is this correct for lighting circuit of 1.5mm line and 1mm cpc
ze+R1+R2=zs

b6 mcb ze R1+R2
6.18ohms - 0.8ohms =5.38ohms


cable per meter = 0.03020ohms so 5.38ohms/0.03020=178.1M

does this mean my lighting circuit can be this length 178M and still be within zs value... cheeers if makes sense

 

[i=p/u]

all good in the hood then, i can go 108 meters with my lighting circuit according to osg page 44?? on a 5amp breaker?

 

[telectrix]

and powerewd by a pedal genny if you want.

all good in the hood then, i can go 108 meters with my lighting circuit according to osg page 44?? on a 5amp breaker?

 

[Guest 004]

That is on a BS 3036 fuse or BS 1361, not really used now on new installations, and is in absolute ideal conditions, should have some factors in there really even if only 0.95, will bring the length down.
You will probably also notice the length for 60898 MCB's which are more widely used nowadays, where the length comes down to 90, again in ideal situations.

 

[i=p/u]

ty enigma ,so where do i get this info on mcb 60898.. isit in osg???

 

[Guest 004]

yes it is, it is the next column down, but under cb/RCBO Type B/C/D, little confusing really, then if you look over to the right, it has a columns that state RCD or no RCD. all in all the figures seem to be same.

 

[Guest 004]

oh should say the next 2 'row's' down, before i get jumped on by the 'absolute correct crew'

 

[telectrix]

oh should say the next 2 'row's' down, before i get jumped on by the 'absolute correct crew'

pmsl. nice comment.

 

[i=p/u]

ahhhhh i see it, finally. still says 90M tho, so i can run my 6amp type b mcbreaker for lighting circuit and the length can be 90M.

 

[Sparky Ninja]

oh should say the next 2 'row's' down, before i get jumped on by the 'absolute correct crew'

really??

there's no harm in trying to avoid misrepresentation.

 

[IQ Electrical]

oh should say the next 2 'row's' down, before i get jumped on by the 'absolute correct crew'

That's better, never confuse rows and columns, it's a slippery slope and absolutely critical to the proper functioning of any table!

Yours,

Absolutely Correct Crue

 

[Guest 004]

ahhhhh i see it, finally. still says 90M tho, so i can run my 6amp type b mcbreaker for lighting circuit and the length can be 90M.

indeed you can, but do you really need to run a circuit that long?

 

[Guest 004]

That's better, never confuse rows and columns, it's a slippery slope and absolutely critical to the proper functioning of any table!

Yours,

Absolutely Correct Crue

I think i am starting to understand, why nobody understands me !!!

 

[Guest 004]

peace brothers, I have a tough day, on an 'easy' job, that was not easy. Surveyed by somebody else of course.

 

[IQ Electrical]

I think i am starting to understand, why nobody understands me !!!

Enigma-"One that is puzzling, ambiguous, or inexplicable"

 

[IQ Electrical]

Joking aside though, this is actually a pretty good thread for information!