Ring continuity

[Weaver83]

Hi guys under what circumstance would a ring circuit continuity test NOT be required during an inspection and test ?

 

[Octopus]

Can't think of a reason why you wouldn't do this except maybe under EICR.

 

[malcolmsanford]

^^^^^^^^^^^^^^^ That would be about it .....................next question

 

[telectrix]

or if the I&T is for a letting agent at £30 per visit. drive by EICR.

 

[ringer]

Surely you would test RFC continuity under a EICR? Or are you suggesting there may be particular circumstances under which a LIM could be applied instead of doing these particular tests? If so, then how about a couple of examples?

 

[Risteard]

During periodic inspection and testing where there are records of ring final circuit continuity tests and where there is no evidence of any alterations to the ring final circuit then it is not necessary.

 

[telectrix]

but for how long it takes, i would check it. who's to know if the client hasn't added a socket outlet and broken the ring.

 

[malcolmsanford]

Surely you would test RFC continuity under a EICR? Or are you suggesting there may be particular circumstances under which a LIM could be applied instead of doing these particular tests? If so, then how about a couple of examples?

Safety circuit in an hospital could be one
IT circuit in a Tier 4 Data Centre could be another.

 

[telectrix]

or, perish the thought, a circuit supplying a forum member's PC.

 

[brman]

or, perish the thought, a circuit supplying a forum member's PC.

nah, on that one I would pull the fuse without even asking

 

[Richard Burns]

Hi guys under what circumstance would a ring circuit continuity test NOT be required during an inspection and test ?

If there are no ring final circuits on the board!!

 

[nickblake]

When its connected to the coffee machine

 

[telectrix]

or the beer cooler.

 

[ringer]

Hi guys under what circumstance would a ring circuit continuity test NOT be required during an inspection and test ?

Is there a particular reason why you are asking this?

 

[Lemmor]

Hi guys under what circumstance would a ring circuit continuity test NOT be required during an inspection and test ?

what circumstance??? Hmmmmmm, let me think??? If it is a RADIAL CIRCUIT??? :tongue3::tongue3::tongue3: sorry could not resist, allways test as you not know if there has been any previous work been done, just be safe.

 

[Weaver83]

what circumstance??? Hmmmmmm, let me think??? If it is a RADIAL CIRCUIT??? :tongue3::tongue3::tongue3: sorry could not resist, allways test as you not know if there has been any previous work been done, just be safe.

I would have thought that during an inspection and test this would be required even with previous circuit details etc, but it was a question on a 2391 test worth 3 marks, any other suggestions.

 

[Risteard]

I would have thought that during an inspection and test this would be required even with previous circuit details etc, but it was a question on a 2391 test worth 3 marks, any other suggestions.

No. IEE Guidance Note 3 specifically states that it is not required.

 

[bencrockett15]

What is EICR?

 

[Octopus]

What is EICR?

Electrical Installation Condition Report - replaced PIR on the 1st Jan 2012

 

[Lemmor]

I would have thought that during an inspection and test this would be required even with previous circuit details etc, but it was a question on a 2391 test worth 3 marks, any other suggestions.

If your visual is unsatisfactory, signs of overheating with possible crumbled insulation giving wrong readings, etc

 

[telectrix]

and there's me thinking it was ERIC, the white horse that went into a pub, and the landlord said to him " we have a whisky named after you" . and the horse said "fancy naming a whisky eric."

 

[Dipzy]

it's the way you tell 'em. R.I.P Frank

 

[electricshock]

During periodic inspection and testing where there are records of ring final circuit continuity tests and where there is no evidence of any alterations to the ring final circuit then it is not necessary.

That kind of beats the point of doin a EICR. Might as well copy all the results from the last Periodic

 

[Deleted member 26818]

If this is an exam question, then to my mind the answer should be: During a PIR/EICR and the circuit cannot be de-energized due to limitations.
In real life, I would conduct a Zs test and PSSC test at each outlet, if the readings are all essentially the same (assuming no spurs) then this would indicate the conductors are continuous.
If there is a break in either the line or earth, the Zs readings should increase as you progress around the ring working from the DB, until the break, when the readings should start to decrease as you get closer to the DB.
If there is a break in either the line or neutral, PSSC readings should decrease, then increase after the break.
If both readings indicate a break, then it is a break in the line conductor or perhaps all three conductors, if only one set of readings indicates a break, then it would be in either the CPC (Zs) or neutral (PSSC), depending on which set indicates a break.