M
mgnelec09
Hi,
I went to a job yesterday and the guy talked me through this job;.
They have an 8 way 3ph board fed from what looks to be a 25mm cable, the run about 70 mtrs away from the incomer
the main incomer has a dodgy sub main but gets a Ze reading of 0.09 but at the board in question the Ze is 0.37.
It looks like a tn-cs system but hard to tell, defo not TT
They now want to add a new 12 way 3phase board on to this board on a 63amp 3p mcb to supply the new one which is around another 20 mtrs further on.
The new board need to be powering a break tester which itself needs to be on a 63A,
can you see where I am going with this?
The new board also need 5x 3ph sockets for welders etc plus a couple of single phase radials and some 3 phase supplies for roller shutter doors.
All off a 63amp
What do you think?
I went to a job yesterday and the guy talked me through this job;.
They have an 8 way 3ph board fed from what looks to be a 25mm cable, the run about 70 mtrs away from the incomer
the main incomer has a dodgy sub main but gets a Ze reading of 0.09 but at the board in question the Ze is 0.37.
It looks like a tn-cs system but hard to tell, defo not TT
They now want to add a new 12 way 3phase board on to this board on a 63amp 3p mcb to supply the new one which is around another 20 mtrs further on.
The new board need to be powering a break tester which itself needs to be on a 63A,
can you see where I am going with this?
The new board also need 5x 3ph sockets for welders etc plus a couple of single phase radials and some 3 phase supplies for roller shutter doors.
All off a 63amp
What do you think?
