Square metres

[Farmelectrics]

Having brain freeze at mo after few beers so just a quick one a 20a radial your allowed no more than 50 square metres how do I calculate this to metres if it was a straight run for my radial

 

[Geordie Spark]

That's got to be Viz.

At least the Geordies are good at one thing!

Two things actually.

Ask Your Lass about the other. :devil2:

 

[sparks1973]

That's got to be Viz.

At least the Geordies are good at one thing!

i thought vas was more about sharon n tracy...more our neck of the woods like....

 

[Silly Sausage]

She's been telling me that Wednesday night is staff meeting for the last 2 years...

 

[Geordie Spark]

She's been telling me that Wednesday night is staff meeting for the last 2 years...

Well she's not been lying to ye ....... she just forgot to tell ye whose staff she's been seeing. :tongue3:

 

[Silly Sausage]

Stop! This is turning into a H69 thread.

 

[the oracle]

You are actually not looking at the length of the cable, the 50 metres squared relates to the floor area served by the circuit you are installing. So wherever your radial goes, check out the size of the room or rooms served. Calculate the combined area, historically it has been limited to 50 metres squared!
Then you have to check out the other design criteria, likely Zs, operating times for CPD, volt-drop, etc.
Check page 426 in your regs book for radial circuit arrangements.

 

[Silly Sausage]

Back in sensible mode.

Basically, the area is irrelevant.
As you say above, as long as the cable meets the design criteria, it can be as long as you want, covering any area. (?)

 

[ipf]

Well, you could have a very long & narrow room, 100m x 0.5m
or a square room 7m by 7m

Or Pi x r2 for a round one:willy_nilly:

 

[Elmer BeFuddled]

...... actually I understand them to be historical guidelines........

I find them quite funny at times as well!

 

[trev]

i thought vas was more about sharon n tracy...more our neck of the woods like....


View attachment 15201

How man! Divvent yee caal wor lass Sharon! Hor nyem is Sandra an if ye reckon Aa divvent knaa worram taalkin aboot, read the beuk
Sharon an Tracey worron Bords Of A Feather man

 

[Geordie Spark]

How man! Divvent yee caal wor lass Sharon! Hor nyem is Sandra an if ye reckon Aa divvent knaa worram taalkin aboot, read the beuk
Sharon an Tracey worron Bords Of A Feather man

Aye ... 'n' them were Cockney bords not Geordie bords an'all.

 

[trev]

Aye ... 'n' them were Cockney bords not Geordie bords an'all.

Wey, Essex lyk but syem diffrence.
2 fatties and a ---- as opposed to 2 fat -----. See people, in geordieland everything is more efficient

 

[the oracle]

Actually the area is very relevant to the original question, and is also mentioned in the Regs, as the overiding indicator of whether a radial protected by a 20A cpd, or a radial with 30/32A cpd, or a ring final circuit should be installed. Once the 'type' of circuit has been decided, then all the other design criteria can be determined.

I think maybe the original text of the question got lost in amongst the banter and beer talk? Still,it was a Saturday night and boys will be boys.

 

[Geordie Spark]

Actually the area is very relevant to the original question, and is also mentioned in the Regs, as the overiding indicator of whether a radial protected by a 20A cpd, or a radial with 30/32A cpd, or a ring final circuit should be installed. Once the 'type' of circuit has been decided, then all the other design criteria can be determined.

I think maybe the original text of the question got lost in amongst the banter and beer talk? Still,it was a Saturday night and boys will be boys.

........... and we all want to join the 3000 club.

 

[i=p/u]

depending on loadand installation method page 61 osg says 31 m but this errrs on the side of safety for humty dumptys so do calcs out and maybe find it ok for lot more, but yes depends on load expected...


ask your wife