Construction: split neutral and earth copper concentric conductor (TN-S supply) Conductor: aluminium or copper Sizes: 25 to 35mm² (25 single phase, 35 three phase), larger on request Networks: supplied to each network's own spec, e.g. UKPN, NGED, SSE, SPEN, ENWL, NPg, plus IDNO Options: PVC (black) or LSOH (orange) sheath, cut to length, supplied on drum Standard: BS 7870-3.21