Factory-direct from Lahore · Nationwide delivery in 2–4 days
+92 319 4262451
WhatsApp
A plant is not one cable job. The fixed feeder, the tail onto a machine that moves, the run across the yard and the long incoming line are four different products, and the shed they all sit in is hotter than the chart that rated them.
Pick the family first, size it second, then take the shed's temperature off the rating.
Fixed feeders from the main panel to sub-boards and machines are class 2 stranded copper, PVC insulated, 450/750 V, four core. Tails onto a machine that moves or vibrates are class 5 flexible. A yard crossing or a buried run goes armoured. On the long incoming line the metal itself changes, because aluminium costs less per metre for the same job. Then every capacity comes down: a 22 kW compressor draws 22,000 ÷ 611 = 36 A at 415 V, and on a tray in a shed well past 30 °C the 41 A that 6 mm² carries on the chart is not enough — 10 mm² is.
What separates a factory from a building of the same floor area: the loads run for shifts rather than minutes, and half the cable is moving or exposed. Read the third column — the family is chosen by what the cable has to survive, not by the current.
| Part of the plant | Cable family | Why that one |
|---|---|---|
| Main panel to shed sub-boards | Class 2 stranded copper, PVC, 450/750 V, 4 core | Fixed and clipped or on tray; sized on demand, then derated for the shed |
| Sub-board to a fixed machine | Class 2 stranded copper, 4 core | Balanced three-phase load — the full-load current on the nameplate beats any chart |
| Tail onto a machine that moves or vibrates | Class 5 flexible copper, 300/500 V | Fine strands survive flexing and being re-dressed at the terminal |
| Yard crossing, vehicle route, buried run | Armoured | Steel wire takes the impact, the soil pressure and the forklift |
| Long incoming and distribution runs | Aluminium | Cost per metre at large conductor sizes; the size steps up for the same current |
| Earth and bonding conductors | Copper, derived from the phase conductor | Sized off the phase it protects, never guessed |
Rows one and two are the ordinary sizing job — the kW-to-mm² ladder is on 3-phase cable size, and a single motor with its starting current on industrial cable sizing. Row four decides on the route rather than the amps: cable for an underground run. Row six is derived from the phase conductor, on earth cable.
The compressor sits 45 m from its sub-board, the feeder runs on a tray with other loaded circuits, and the shed roof holds the floor around 45 °C through the summer. This is the arithmetic, written so it can be audited.
So the feeder is 10mm 4 core cable — one size above what the 30 °C chart alone would have sold you, and the whole difference is the factor. Write it as base × factor = result every time. Check your own run in the voltage drop calculator, or start from the load in the cable size calculator.
Class 2 stranded copper, PVC insulated and sheathed, for panel-to-board and board-to-machine runs.
Lighter and cheaper per metre where the metre count, not the machine, decides the order.
Inside the plant the answer is copper: machine terminals are made for it, and the runs are too short for the metal price to be the argument. The argument starts on the incoming line, where the metre count decides the order. The lighter metal carries less current for the same mm², so the conductor steps up and the terminations have to be made for it — per-size figures on aluminium cable, and the trade-off in full on copper vs aluminium cable.
One limit, stated before you order rather than after: our line is PVC insulated copper and aluminium at a 70 °C conductor rating, 450/750 V fixed and 300/500 V flexible. It is not medium-voltage cable, and it is not fire-survival or low-smoke cable, which is a separate certified product class — our position is on fire resistant cable. Send the specification with the enquiry and we will say which lines of it our range covers.
Size, cores, construction and metres per line — or the load schedule, and we will read the sizes off it with you.
Cable is priced off the day's copper rate, so the quote carries its date. No dealer margin between the line that drew it and you.
Collect from the factory in Lahore, or we dispatch by courier or transport — Punjab in 1–2 days, rest of Pakistan in 2–4.
Send the load schedule or the cable lines from your BOQ. You get the day's factory price against each one, with collection from Lahore or dispatch by courier or transport.