DB fed from confusion?

[craig1000]

Scenario is;-

Single Phase DB-3(for identification purposes) fed from link blocks
Link blocks fed from 100A Isolator and also feed a Single phase Wylex old isolator protected by RCD
Link Blocks consist of CPC---Phase 1---Phase 3-----Neutral
These come from 100A Isolator mentioned above (3 phase but only 2 phases are being used from the Isolator)
The Isolator is not a Switch fuse with Fuses in
This in turn is fed from a 100A Switch-fuse Isolator

In terms of a EICR for the DB schedule asking where DB-3 is fed from will it be the 100A Isolator and if so what is the protective device?

Or will it be classed as fed from the 100A Switch-fuse Isolator and protected by the BS88 100A fuses within?

Thoughts please?

 

[Silly Sausage]

If I understand that correctly, the 100A Isolator is redundant; so I'd say, fed from the Switch Fuse.

 

[craig1000]

Cheers Archy,

That was my thoughts. The isolator is offering just local isolation to the link blocks and offers no protection. Strange set up really IMO but I just want to report my findings correctly.

Thanks!

 

[Silly Sausage]

Or maybe say fed from the S/F via the isolator.
Covers it all then!

 

[craig1000]

Yeah have indicated that the best I can. Will include more info in the report. Bloody NAPIT desktop im using though restricts the characters you can use in descriptions stupidly! ;-(