What a normal r1 = r2 result should be on a light circuit

[scintillasam]

Hi,

I just done a job today and got some reading of 7ohms, on continuity of a light circuit (B6 CB) this is the highest I have yet seen
is this still ok? Or is this a problem?

Cheers

 

[telectrix]

either you've got an extremely long circuit, or bad connections. yes. 7Ω is a priblem

 

[scintillasam]

either you've got an extremely long circuit, or bad connections. yes. 7Ω is a priblem

I figured this as the circuit is quite short what sort of reading should I be expecting for about 20 meters?
Thanks

 

[telectrix]

about 0.7Ω-- 1/10 of what you say you are getting.

 

[Geordie Spark]

about 0.7Ω-- 1/10 of what you say you are getting.

Has the OP put his dismal point in the wrong place I wonder?

 

[telectrix]

if so i nominate him for one of these:

and when are some guys going to learn the difference between r1 an R1? it's like meerkat and market. different words, different meanings. ssssimplesss

 

[KFH]

Was there a switch in circuit? Poor/dirty contacts can cause high readings. Operating the switch a few times will often produce a better results.

 

[GLENNSPARK]

Hi,

I just done a job today and got some reading of 7ohms, on continuity of a light circuit (B6 CB) this is the highest I have yet seen
is this still ok? Or is this a problem?

Cheers

theres no fixed value for R1 R2....just a suitably low value....but 7 ohms?...
come on what do you think...
for a start it wont meet a Zs for a 6A MCB to BSEN60898...will it...

 

[GLENNSPARK]

if so i nominate him for one of these:

and when are some guys going to learn the difference between r1 an R1? it's like meerkat and market. different words, different meanings. ssssimplesss

yep...basics as well Tel...

 

[R G]

Do an R2 test with a long lead start nearest point and work further away and see what you get

 

[Heisenberg]

Has the OP put his dismal point in the wrong place I wonder?

You're either atrocious at spelling or that is some very clever word play :thinking:

 

[Octopus]

Move to another point on the lighting circuit and retest then compare the readings.

Loose connection IMHO - are the CPC's twisted together or connected "properly"?

 

[Pondy]

Is the circuit rcd protected, if it is then theoretically the maximum zs allowed is 1667 ohms

 

[Geordie Spark]

You're either atrocious at spelling or that is some very clever word play :thinking:

There's nowt rang wi' me spellin' bonny lad.

 

[Octopus]

Is the circuit rcd protected, if it is then theoretically the maximum zs allowed is 1667 ohms

Maybe BUT relying on RCD's is not ideal IMHO