Wheres the fault?

[m4tty]

A radial circuit wired in 2.5mm2 PVC singles fails an insulation resistance test between live conductors. A continuity test reveals a reading of 0.67 Ohm, how far along the length of the circuit is the fault?

 

[revjames]

0.67/0.0741 = 9M divide by 2 so 4.5M

 

[ian932]

A radial circuit wired in 2.5mm2 PVC singles fails an insulation resistance test between live conductors. A continuity test reveals a reading of 0.67 Ohm, how far along the length of the circuit is the fault?

Are you 100% sure there is nothing connected or a neon in circuit although they would not normally show up on continuity

 

[ianmacd]

Are you 100% sure there is nothing connected or a neon in circuit although they would not normally show up on continuity

A neon drawing 343A?

 

[Andy™]

A neon drawing 343A?

at least it will get your attention to the fact it is on

 

[ianmacd]

[quote name='Andy

 

[ian932]

0.67/0.0741 = 9M divide by 2 so 4.5M

Its 7.41ohms/Km

0.67/0.00741 = 90.4M divide by 2 so 45.2M

It may be a little less than that as you could have a bit of resistance on the terminations.

 

[ian932]

Probably have aircraft landing in the road too.I assume this is a theoretical question?

ROTFWLROTFWLROTFWLROTFWLROTFWLROTFWL

 

[revjames]

Its 7.41ohms/Km0.67/0.00741 = 90.4M divide by 2 so 45.2M

It may be a little less than that as you could have a bit of resistance on the terminations.

I got that figure but thought I had a 0 on the wrong place!

 

[ian932]

I got that figure but thought I had a 0 on the wrong place!

to many of these eh Guinness