- Reaction score
- 5
I have a agreed on site with electrical foreman to install 48 way dist. boards on 8 floors. We both agreed on a horizontal 4"x 4" header(approx. 400mm long) on top of board with a 600mm stem 4"x 4" stem into header thus forming a tee. This was in plastic although my own preference would be metal trunking. The boards were fed in t&e approx. 17 lighting circuits 1.5mm . 6amp ,18 radials 2.5mm sockets 16amp and 6 cookers 10mm.Some rooms have heaters small loading, i think . When cables are compressed into trunking there is at least 50% excess space left . Apart from the short trunking above board the cable mainly runs on basket for about 20 metres and through a wall passing into 300m of plastic pipe filled with firestop.I have installed this on five floors .Now some buffoon , a so called sparks has said that because of grouping there should not be the 600mm of vertical trunking above the board as there is not enough space for grouping!!!!! But keep horizontal bit, ha ha. I find this absurd as it is such a small length and there is still 50% capacity for more cables anyway.If anything the cables passing through wall filled with firestop would be susceptible as there is no air gap at all !!!!! .Help would be much appreciated as I think it absurd to change what I have done .