Worldwide ring mains

[Brightspark2]

This old chestnut of a ring becoming open circuit, in all the years i've been in this industry i've never come across such a scenario.

I come across it quite often actually, not in houses but in commercial and industrial premises...

Either a break in just one of the conductors or all of them...

Quite common...the last EICR I did had 2 out of the 4 rings like this...

Sent from my Xperia S using next doors WIFI.

 

[Engineer54]

I come across it quite often actually, not in houses but in commercial and industrial premises...

Either a break in just one of the conductors or all of them...

Quite common...the last EICR I did had 2 out of the 4 rings like this...

Sent from my Xperia S using next doors WIFI.

I can only ask HOW did they become open?? Surely using that analogy, it could also be applied to a Radial circuit.

As i have stated, never seen a ring becoming open circuit. Not saying it can never happen, but i would say that it's a lot rarer than some would have us believe. Can't really grasp how a professionally installed and tested ring circuit can suddenly go open, without someone's intervention...

 

[Knobhead]

without someone's intervention...

I think thats just hit the nail on the head.

 

[Geordie Spark]

Also, car head lamps with a photo cell in the that picked up lights from another car comming towards you and would auto dip. Trouble is I thought it'd react too late, however think Merc are doing it now

I would want it to work the other way round ...... to dazzle those who dazzle me !!! :devil2:

 

[Brightspark2]

I can only ask HOW did they become open?? Surely using that analogy, it could also be applied to a Radial circuit.

Very true...As you mention its mostly down to peoples intervention, extending the ring incorrectly etc and as you rightly say the other faults could happen to a radial such as broken conductors, brunt out etc etc but as is being said with a ring you then theoretically have to radials protected by a 32A OPD...

I'll opt for the horses for courses option they both have there pro's and con's it just depends and the jobs demands as to which is installed...