M
martinh287
Hi guys got to test a job tomorrow which I know has been installed incorrectly before I have even gone to the job but our "senior electrician" has done the work and my boss wont do anything about him.
Anyway 200a selective vels unit with 35 mm 4 core swa feeding a 3 phase disrubution board 140m away My colleagues have install 25mm double insulated tails to a single phase 100a selective vels unit ( single phase taking from black phase / no balancing out of the phases to accomadate for this ) the 100a vels unit is approximately 3m away and inturn feeds 70 16mm2 3 core swa to another disrubution board with a couple of circuits on.
I am ment to complete a eic and return to my boss to sign off the work.( I wont sign off the work for the company as the work is never to my standard) I will just test the circuits record results and note deviations.
There are the obvious problems.undersized cables for the overcurrent device ( which my boss will argue rcd covers it).balancing out of the black phase. problem is I know when running parrellel circuits off the same breaker has to be done with equal length s of the same size csa but I want to be clear on the reasoning for this before I jump in with both feet
Anyway 200a selective vels unit with 35 mm 4 core swa feeding a 3 phase disrubution board 140m away My colleagues have install 25mm double insulated tails to a single phase 100a selective vels unit ( single phase taking from black phase / no balancing out of the phases to accomadate for this ) the 100a vels unit is approximately 3m away and inturn feeds 70 16mm2 3 core swa to another disrubution board with a couple of circuits on.
I am ment to complete a eic and return to my boss to sign off the work.( I wont sign off the work for the company as the work is never to my standard) I will just test the circuits record results and note deviations.
There are the obvious problems.undersized cables for the overcurrent device ( which my boss will argue rcd covers it).balancing out of the black phase. problem is I know when running parrellel circuits off the same breaker has to be done with equal length s of the same size csa but I want to be clear on the reasoning for this before I jump in with both feet
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