Need help with this problem please

[brucegenerator]

looking for some help.just came across this question.
how do i find end to end LENGTH of a ring?
info i have is circuit is wired in 2.5mmpvc singles in conduit r1+r2 is 0.2594 ohms at room temp.

 

[Des 56]

Take a look at Page 166 of the on site guide,see if that will help you

 

[brucegenerator]

Iwas just reading my 2391 course notes but do not have an onsite guide.Any other info would be most welcome cheers.

 

[Des 56]

Values of resistance /meter or( R1+R2)/meter for copper conductors at 20* centigrade

Line 2.5mm cpc 2.5mm resistance 14.82 ( R1+R2) /meter (milli ohm/meter )

 

[brucegenerator]

Searched an earlier post and found formula r1 +r2x1000 divided by resistance per m.multiply this by 4 as its a ring.Can anyone confirm this please .Thank u/

 

[pushrod]

Searched an earlier post and found formula r1 +r2x1000 divided by resistance per m.multiply this by 4 as its a ring.Can anyone confirm this please .Thank u/

yep and the value for 2.5mm line and cpc is 14.82mohm/m giving a circuit length of 70 metres.