M
mgnelec09
Hi,
went to to look at a job last week where the builder proposes that the new electrical installation will require 135amp three phase.
However the the main incomer to the site only seems to be 100 amp three phase and a 25 mm incomer.
i have calculated that the run from the main incomer to the new building will be around 80 Mtrs which will require a 35 mm 4 core swa
would I be right in saying that the mains would need upgrading to 250amp to split the existing 100 amp main distribution board up from the new proposed building on 134 amp.
Surely this his will mean the main incomer will need upgrading to around 75 mm?
any advice appreciated. Thanks steve
went to to look at a job last week where the builder proposes that the new electrical installation will require 135amp three phase.
However the the main incomer to the site only seems to be 100 amp three phase and a 25 mm incomer.
i have calculated that the run from the main incomer to the new building will be around 80 Mtrs which will require a 35 mm 4 core swa
would I be right in saying that the mains would need upgrading to 250amp to split the existing 100 amp main distribution board up from the new proposed building on 134 amp.
Surely this his will mean the main incomer will need upgrading to around 75 mm?
any advice appreciated. Thanks steve