gselectrical
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Evening all. Went to see a job earlier and would appreciate some advice regarding a few things. I mainly carry out domestic work now but my apprenticeship involved a lot of commercial/industrial work.
Anyway, the job involves replacing an old wylex 8-way board and an old Buss 3 phase board. These boards are located at an Annex to a large country hotel. They both feed different appartments of the Annex, fed via a sub main from a 3 phase switch fuse at the hotel.
The sub main enters the Annex and connects directly into a Buss 3 phase isolator. From there L1 is connected to the 8-way Wylex via a meter. Then L2 + L3 connect directly into the Buss 3 phase board (unmetered), L1 is also connected to the 3 phase board but via another meter.
Basically I would like to keep the Buss isolator, Install 2 single phase 8 way metal CU's (with RCBO's) to replace the current CU's. (Many circuits on the 3 phase board are now redundant) Each board on a different phase.
Does this sound ok?
I cannot establish exactly what cable is supplying the Buss isolator. It looks like a 16mm 4 core armoured with the armouring being used as an earth. However the cores are Red, Blue, White and black (neutral). I need to know whether this is suitible for the installation. 0.32 Ze measured at this isolator.
Sorry if this post is a bit long-winded, but could do with some advice regarding the sub main cable and my proposal.
Pics to follow.
Cheers. J
Anyway, the job involves replacing an old wylex 8-way board and an old Buss 3 phase board. These boards are located at an Annex to a large country hotel. They both feed different appartments of the Annex, fed via a sub main from a 3 phase switch fuse at the hotel.
The sub main enters the Annex and connects directly into a Buss 3 phase isolator. From there L1 is connected to the 8-way Wylex via a meter. Then L2 + L3 connect directly into the Buss 3 phase board (unmetered), L1 is also connected to the 3 phase board but via another meter.
Basically I would like to keep the Buss isolator, Install 2 single phase 8 way metal CU's (with RCBO's) to replace the current CU's. (Many circuits on the 3 phase board are now redundant) Each board on a different phase.
Does this sound ok?
I cannot establish exactly what cable is supplying the Buss isolator. It looks like a 16mm 4 core armoured with the armouring being used as an earth. However the cores are Red, Blue, White and black (neutral). I need to know whether this is suitible for the installation. 0.32 Ze measured at this isolator.
Sorry if this post is a bit long-winded, but could do with some advice regarding the sub main cable and my proposal.
Pics to follow.
Cheers. J