415 V armoured cable from the transformer LT side to panels, MCCs, machines and site distribution — laid, glanded, terminated and tested.
Two things decide an LT run: the termination and the length. A gland and lug done properly stays cool under load; a cable sized on current alone runs out of volts before it reaches the far end, and the symptom looks like a machine fault.
LT underground is the bulk of the cabling on any working plant: transformer to LT panel, panel to MCC, MCC to machine, and the sub-mains that feed sheds, pumps, compressors and lighting. There is a lot of it, it grows every year, and it is usually the part that gets done fastest and documented least.
We size and route it properly — cable sized against load current, length and voltage drop rather than against whatever is on the shelf — then gland, terminate and ferrule it so that the next person to open the panel can tell what goes where. Tray and trench routes are laid out so future circuits can be added without re-doing the run.
A long LT run sized only on current, not voltage drop, delivers low volts at the far end. The symptom looks like a motor fault or a drive tripping — the cause is the cable, and it stays hidden until someone measures at the load.
LT panel fires almost always start at a termination that was not torqued or was lugged onto a dirty face. Correct crimping, double-compression glands and a re-check on load is a small job that prevents the largest one.
The value of a labelled cable schedule is not felt on the day of installation. It is felt the night a breakdown crew has to identify one core out of forty in a live panel.
Cable sized on load current, route length and permissible voltage drop; tray and trench routes set out with spare capacity.
Cable laid, clamped and dressed on trays and in trenches, with bending radius maintained at every change of direction.
Glanded, lugged, crimped and ferruled into panels, MCCs and machines; armour and body earthing bonded.
IR, continuity and phase sequence checked, circuit energised and terminations re-checked under load.
Send the load, the voltage level and the location. We survey, then quote against a defined scope.
