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B

Bradzz

inspected a job, service head 3p 4 wire.
100A BS88.
meter tails 25mm2 ccc 101A
out meter into 2 * henly blocks.
out the henly blocks split into 2 supplies, 16mm2 singles, ccc method B 76A.
1 supply goes to 2* db fed into bottom db then linked to top db via main switch as photo.
2 supply goes into a addaptable box into 2 connector blocks 30A linked to 10mm2 MI cable not sure what that is feeding unable to locate but from what they say it goes of into a tower block? N/V ccc of MI 82A thermo coverd.
what codes would you place on this set up ?.
cheers for any help that can be given my mind has gone blank, and i need to input some wording in to the obs section but trying to keeps it to the min not long winded.[ElectriciansForums.net] help wanted for codes C1 or C2[ElectriciansForums.net] help wanted for codes C1 or C2[ElectriciansForums.net] help wanted for codes C1 or C2[ElectriciansForums.net] help wanted for codes C1 or C2
MI cable has no means of Isolation. except the main cutout fuse.

16mm2 on a 100A head.
should this not be 25mm2 from meter to ccu and MI cable.
or better still 3 p meter to ryfield 63A then to loads, or 3 isolators. just asking?.
 
Last edited by a moderator:
if theres no isolation for the pyro from the service fuse , then code 2 as it needs a switch and a fuse if the run is more than 2mtrs from the supply.

as for the tails looped out of DB switch , well its not dangerous ( at present ) but its not great either.
i'd be concerned that the 16mm tails could be underated for supplying 2 boards
surely its only 10 mins work to put each DB on its own set of tails from henley block
 
and another thing , if this is 3 phase , then having 2 db's sharing tails means theyre on the same phase as well
hardly great balancing of the loads ?
code 3 , needs improvement in my op.
 

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