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

 

[Sparky Ninja]

maybe this will make sense soon, thanks

All in good time buddy, have you started studying cable selection yet?

 

[i=p/u]

ive done cable selection, but its just with lighting as they can be long circuits, counting switch drops aswell. i know you get you Ib then select In then It has to be has to be equal or greater than your In/ca,ci,cg,cc. then you do volt drop and if is over limits you increase your csa.

its just i would like to know what the distances you can go on lighting circuits. according to page 44 of osg, a 5A tybe b bs1361 1.5mm/1mm can reach a length of 108 meters wich includes 3% vd.

am i reading correctly. or am i walking on sunshine thanks you **** *******.

 

[telectrix]

ive done cable selection, but its just with lighting as they can be long circuits, counting switch drops aswell. i know you get you Ib then select In then It has to be has to be equal or greater than your In/ca,ci,cg,cc. then you do volt drop and if is over limits you increase your csa.

its just i would like to know what the distances you can go on lighting circuits. according to page 44 of osg, a 5A tybe b bs1361 1.5mm/1mm can reach a length of 108 meters wich includes 3% vd.

am i reading correctly. or am i walking on sunshine thanks you sexy fuk kers.

that last comment mate , was a bit near the knuckle. behave or the mods will come in their white coats and take you away. hee,hee.

 

[IQ Electrical]

Yes, watch that language-even if it is accurate!

 

[i=p/u]

they'l be fine, i think you care about me and if you really do, can you check your book and tell me im right..

when your adding your swtich drops would you count down and upas circuit length, i know probably shabby question to you guys but i feel i need to kno

 

[telectrix]

just think of the path taken by all those little electrons-- from the MCB up to the fitting, down to the switch, back up to the light , then all the way back to the neutral bar in the CU. all that and back again 50 times a second.

 

[i=p/u]

tel so you multiply by 50 and then 60 seconds, only joiking does 108 meters sound right

 

[i=p/u]

ive done cable selection, but its just with lighting as they can be long circuits, counting switch drops aswell. i know you get you Ib then select In then It has to be has to be equal or greater than your In/ca,ci,cg,cc. then you do volt drop and if is over limits you increase your csa.

its just i would like to know what the distances you can go on lighting circuits. according to page 44 of osg, a 5A tybe b bs1361 1.5mm/1mm can reach a length of 108 meters wich includes 3% vd.

 

[Guest 004]

Actually I think it is 103 meters allowing for a volt drop of 3% (6.85V), and the r1r2 will be 3.71, 104 meters will give a volt drop of 6.9V which equates to 3.01 %

 

[IQ Electrical]

Actually I think it is 103 meters allowing for a volt drop of 3% (6.85V), and the r1r2 will be 3.71, 104 meters will give a volt drop of 6.9V which equates to 3.01 %

R1+R2 (r1 and r2 are ring continuity values)

 

[Guest 004]

was waiting for your input IQ, i think the people know what I mean, whats your problem?

 

[telectrix]

R1+R2 (r1 and r2 are ring continuity values)

so simple and yet it's got wrong in at least 1 post a day.

 

[IQ Electrical]

was waiting for your input IQ, i think the people know what I mean, whats your problem?

I don't have a problem unless I see incorrect information posted along with incorrect terminology then I point it out for the benefit of anyone using these threads as a learning tool towards exams such as 2391-10 where terminology is critical.

 

[telectrix]

was waiting for your input IQ, i think the people know what I mean, whats your problem?

yes, we know what you mean, but others may get confused. correct terminology is essential. example. world war 2. fighter station had suffered losses and damaged aircraft and desperately needed replacement airscrews ( propellors ). the air ministry suits sent then 12 raw recruit aircrew.

 

[Guest 004]

@teletrix, yes indeed, point taken on board. I apologize to the students of this forum, R1R2......