Main Switch/isolator

[Engineer54]

In my opinion, it comes down to whether or not it was or wasn't a requirement at the time the installation was designed, constructed etc. It may have been OK in days gone by, which means that it is still OK now, but i would give it a C3 just from using common sense, and to quote the honourable member Engineer54 "I dont care what the regs say either".

Cheers............Howard

As far as my experience goes, i've never seen a bus-bar chamber of any size connected directly to meter tails, not in the 40 odd years i've been in the industry!!

I'd also argue the point with anyone that is stupid enough to say ''there is nothing wrong'' with such an installation. You are literary handing over the control of such an installation to the DNO, it would also warrant DNO seals being fitted too!! lol!!

 

[Silly Sausage]

We're talking about a Periodic Inspection here, as specified by the IET in BS7671, following regulations given in BS7671, following guidelines given in GN3 (IET publication) and inserting the results into forms specified by the IET in BS7671.

By your own early admission not to acknowledge BS7671, I think you've excluded yourself from this discussion!

 

[Phaze-3]

Does the said bus bar chamber belong to the distributor or to the electrical installation?

Belongs to the electrical installation mate

 

[Engineer54]

We're talking about a Periodic Inspection here, as specified by the IET in BS7671, following regulations given in BS7671, following guidelines given in GN3 (IET publication) and inserting the results into forms specified by the IET in BS7671.

By your own early admission not to acknowledge BS7671, I think you've excluded yourself from this discussion!

I would argue with any of my institute colleagues on this matter. I didn't say that i don't acknowledge BS 7671, but it's not the be all and end all, in many cases it's confusing and at worst contradictory!! The difference being, is that i don't need BS 7671 to tell me when something is right or wrong!!

 

[Engineer54]

Originally Posted by KAS1
Does the said bus bar chamber belong to the distributor or to the electrical installation?

It might as well be, they would be the only people that can officially isolate the bus bar chamber!! lol!!

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[Guest111]

Also 1 argument could be if an emergency arose,say something went wrong in busbar chamber loose connection/arcing the only way to isolate would be to pull the service fuses,potentially under load which could result in injury.

 

[Marvo]

Sounds like the lack of ACB or even isolation might mean the chamber was originally designed as having 'fault free' zones.