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About 12 coils — 5 of 1.5 mm², 5 of 2.5 mm² and 2 of 4 mm² — roughly 950 m of single-core copper, plus a tail from the sub-meter to the flat's board.
That is a 2-bed flat of about 900 sq ft wired to 33 points on 8 circuits, pulled through conduit, with 15% cut in for wastage; a coil is 90 m. The tail is the part that separates a flat from a house: you are fed off a sub-meter on a shared riser, not off your own service, and on an upper floor that vertical run decides the size. On cost, ask any quote which of three scopes it covers — wire only, wire plus fittings, or both plus labour.
A 2-bed apartment of about 900 sq ft covered area, wired to 33 points on 8 circuits, needs about 953 m of single-core copper conductor across the three coil sizes — 414 m of 1.5 mm² for lights and fans, 435 m of 2.5 mm² for socket and kitchen circuits and 104 m of 4 mm² for two AC points and a geyser — plus a 14 m earth run in 6 mm². Bought in 90 m coils that is 5 + 5 + 2 = 12 coils, with the earth cut off a coil rather than ordered as one. Those figures carry a 15% wastage margin and assume one level, a board beside the entrance and conduit routing.
| Circuit | Size (strand code) | Conductor metres | Coils |
|---|---|---|---|
| Lighting and fan circuits | 1.5 mm² (3/.029) | 414 m | 5 |
| Socket and kitchen circuits | 2.5 mm² (7/.029) | 435 m | 5 |
| 2 AC points, geyser point | 4 mm² (7/.036) | 104 m | 2 |
| Earth conductor | 6 mm² (7/.044) | 14 m | cut length |
| Sub-meter to flat DB, ground floor | 4 mm² 2 core (7/.036) | 12 m | cut length |
| Sub-meter to flat DB, upper floor riser | 10 mm² 2 core (7/.052) | 30 m | cut length |
Three inputs, multiplied. A flat differs from a house on the middle one: everything is on a single level and the board sits by the entrance door, so the average run is shorter than in a plot house.
33 in a 2-bed flat: 16 light and fan points, 14 sockets, 2 AC points and 1 geyser. Count yours off the approved layout — this is the input that moves the list most.
9 m per point, against 12 m in a plot house. One floor, no stair drop, no porch or pump run, and the board is by the door.
2.5 for lighting and fan circuits, where switch legs share neutrals; 3 for socket and appliance circuits, each carrying live, neutral and earth.
Lights and fans: 16 × 9 × 2.5 = 360 m. Sockets and kitchen: 14 × 9 × 3 = 378 m. Two ACs and a geyser on 10 m runs: 3 × 10 × 3 = 90 m of 4 mm². Earth: 12 m. Raw total 840 m, earth included. Add 15% for cutting waste and failed pulls and that is 966 m raw, 967 m once each size is rounded up separately — 953 m across the three coil sizes plus the 14 m earth run. Divide by 90 and round up per size for 12 coils. Those 33 points group into 8 circuits — 2 lighting, 2 socket, 1 kitchen, 2 AC, 1 geyser — and with 20% spare that is 10 ways, so a 12-way board. The circuit-by-circuit method, adjustable to your own layout, is on how much cable a house needs.
A house is fed from its own meter on its own wall. A flat is fed from a sub-meter in a bank downstairs, through a riser that belongs to the building. The riser itself is the builder's and is sized for the whole stack; what you own, and what every apartment wiring list leaves out, is the tail from your sub-meter to your distribution board.
Take a 5 kW sanctioned load, ordinary for a domestic flat — read the real figure off your own meter card. At 220 V that is 5,000 ÷ 220 = 22.7 A. Hold the whole installation to 3% of 220 V — 6.6 V — and give the tail about half of it, 3.3 V, since the circuits inside the flat spend the rest.
A ground-floor flat with a 12 m tail on 4 mm² drops 11 × 22.7 × 12 ÷ 1000 = 3.00 V, and it passes. Move the same flat up to the fourth floor, 30 m of riser away, and only one size in the table still fits the same 3.3 V.
| Tail size | 12 m ground-floor tail | 30 m riser, fourth floor |
|---|---|---|
| 4 mm² (11 mV/A/m) | 3.00 V | 7.49 V |
| 6 mm² (7.3 mV/A/m) | 1.99 V | 4.97 V |
| 10 mm² (4.4 mV/A/m) | 1.20 V | 3.00 V |
So the fourth-floor flat takes 10 mm²: a conductor rated 63 A carrying 22.7 A, chosen for the 30 m rather than for the current. 4 mm² carries that load on ampacity with room to spare, 36 A against 22.7 A; what it cannot carry is 30 m of it. Height, not current, is what sizes this run. Check your own run in the voltage drop calculator, and for the building's incoming main see WAPDA meter cable size and main meter cable.
A house split into an upper and a lower portion is the same job as a flat, twice, and it goes wrong in the same three places every time. Decide these before the conduit goes in, because none of them can be fixed after plaster.
Quotes for the same flat differ several times over, and it is almost never the flat that differs. It is the scope. One quote is the wire alone; the next adds conduit, boxes, switches and the board; the third adds the electrician's labour. Almost none of them say which, and comparing two quotes from different scopes is the commonest way a wiring budget goes wrong.
| Scope | What is in it | Who supplies it |
|---|---|---|
| A. Wire and cable only | The 12 coils, the earth conductor, the sub-meter tail | Pilone Cables, factory-direct |
| B. A plus fittings | Conduit pipe, back boxes, switches, sockets, the 12-way board and its MCBs and RCD | Electrical store |
| C. B plus labour | Chasing, laying conduit, pulling wire, terminating, testing, making good the plaster | Your electrician or contractor |
Scope A is the only one we price, and we price it at the day's copper rate, because copper is what moves it — a quote from last month is a different number this month. Per-point and per-square-foot labour rates sit on cable installation cost. If you are rewiring an occupied flat rather than wiring an empty one, the extra work is set out on rewiring an old house.
Class 2 stranded copper, 7/0.85, PVC insulated and sheathed, 450/750 V, drawn on the Pilone line in Lahore. Rated 36 A clipped direct at 30°C — the tail from the sub-meter to a ground-floor flat's board.
Prices track the daily copper rate. Send the coil list, the tail length and your city for today's factory rate on the whole lot.
Also on this list: 3/.029 single core copper cable, 7/.029 copper cable price, 4mm single core copper cable, 6mm single core copper cable for the earth, and 10mm 2 core cable for an upper-floor riser tail.
We draw the copper in Lahore and sell it at the day's rate — no dealer margin. Send the coil list, the tail length and your city: Punjab in 1–2 days, rest of Pakistan in 2–4.