max zs table in the osg

[Lighting]

Hi all sorry for this silly question but i cant seem to find the max Zs table for a 10A BS88-2 Fusein the osg. I can find it in the BGB table 41.4
10A = 7.19 ohms and i know to multiply it by 0.8 (7.19 x 0.8 = 5.75) for rule of thumb but i would like to find the right table in the osg

 

[Octopus]

Not all the bgb is in the osg!

 

[Farmelectrics]

Use the value in the reqs but don't forget to apply the 80% factor

 

[Andy78]

Are you sure you are looking at the right table in the BGB ? table 41.4 is for 5 seconds disconnection.

 

[Pete999]

Hi all sorry for this silly question but i cant seem to find the max Zs table for a 10A BS88-2 Fusein the osg. I can find it in the BGB table 41.4
10A = 7.19 ohms and i know to multiply it by 0.8 (7.19 x 0.8 = 5.75) for rule of thumb but i would like to find the right table in the osg

Page 122 ???? I think thats right

 

[Lighting]

Are you sure you are looking at the right table in the BGB ? table 41.4 is for 5 seconds disconnection.

Hi I'm using table 41.4 has it is for street lighting.

 

[Lighting]

Page 122 ???? I think thats right

Hi Peter999 page 122 is table c1 Application of cables for fixed wiring.

 

[Pete999]

Hi Peter999 page 122 is table c1 Application of cables for fixed wiring.

Are you using the latest OSG? the yellow one?

 

[telectrix]

yellow? i'm still on the red one. it's the same electricity whatever osg you use.

 

[Pete999]

yellow? i'm still on the red one. it's the same electricity whatever osg you use.

Page 122 table B3 not sure if that is what the op is after

 

[Lighting]

Are you using the latest OSG? the yellow one?

no I'm still using the green one

 

[Pete999]

no I'm still using the green one

Flgged mine of flea bay

 

[Engineer54]

Use the value in the reqs but don't forget to apply the 80% factor

To be honest, i've never used this 80% factor and probably never will now!!
Can't see the point of why they need to mess around with proven values that have served electrical installations well for literary donkey's years...

 

[Jonspark]

To be honest, i've never used this 80% factor and probably never will now!!
Can't see the point of why they need to mess around with proven values that have served electrical installations well for literary donkey's years...

i know your not in Britain, but if you were, surely you'd have to work to BS7671 requirements?

wouldn't not meeting these requirements constitute a C2

 

[telectrix]

the figures are given in BS7671 without the 80% correction factor. these are what i use. in winter when we are measuring @3 deg.C, not 20, should we then apply another correction?