How to Choose Perfect House Wiring Size (Save Money + Stay Safe)
Building or renovating your home in Pakistan? Wrong wire size = fire risk, high bills, or tripped breakers. Here's the complete guide to Pakistan Cables pure copper wires with exact load charts, applications, and price comparisons for Karachi, Lahore, and nationwide.
Pakistan Wires Size Chart – Current Capacity Guide
| Wire Size |
Amp Rating |
Best For |
Typical Price/Coil |
| 1.5mm Solid |
15-18A |
Earthing, LED lights, fans |
PKR 4,500-5,500 |
| 3/.029 |
18-22A |
Lighting + fans + sockets |
PKR 6,500-7,500 |
| 7/.029 (2.5mm) |
25-32A |
ACs (2-3 ton), pumps |
PKR 11,000-13,000 |
| 4mm² |
32-40A |
Main ACs, solar DC |
PKR 15,000-18,000 |
| 6mm² |
40-55A |
Panel feeders, 5-ton AC |
PKR 22,000-26,000 |
| 10mm² |
55-80A |
Main service, factories |
PKR 35,000-42,000 |
All prices 90m coils, Pakistan Cables pure copper, 2026 Karachi rates
1.5mm Solid Copper Wire – Earthing & Lighting King
Perfect for:
-
Main panel earthing (green/yellow)
-
LED lighting circuits (100+ lights)
-
Switch drops, exhaust fans
-
Low-power sockets (chargers)
Load: 15A safe (2kW max)
Why solid? Perfect earth contact, no strand breakage
Don't use for: ACs, pumps, heavy appliances
3/.029 Pure Copper – Most Popular House Wiring
The workhorse of Pakistani homes:
-
Lighting + 8-10 fans per circuit
-
Light sockets (no heaters)
-
Switchboards, MCB connections
Load: 20A (3kW)
Stranded flexibility for easy pulls
Pro tip: Red=Live, Black=Neutral circuit pairing
7/.029 (2.5mm²) – ACs & Pumps Standard
Go-to for medium loads:
-
1.5-3 ton split ACs
-
1-2HP water pumps
-
Kitchen sockets (iron, microwave)
-
Main DB to sub-panel
Load: 32A breaker safe
2.5mm² cross-section = industry standard
4mm² – Heavy Duty Main Lines
When 2.5mm trips breakers:
-
3-ton ACs + lights
-
Solar DC wiring (panels to inverter)
-
Long main runs (>50m)
-
Multiple appliances
Load: 40A continuous
Lower voltage drop than 2.5mm
6mm² – Industrial Panel Feeders
Commercial/residential heavy:
-
5-ton central AC
-
3HP industrial pumps
-
Main meter to panel (150+ sqm)
-
Factory small machine feeders
Load: 55A (11kW single phase)
Requires 32mm conduit
10mm² – Main Service Entrance
Ultimate capacity cable:
-
200A house main supply
-
5+ ton AC systems
-
Factory main feeders
-
Large solar array DC mains
Load: 80A continuous
Professional installation only
Pure Copper vs CCA/Aluminum – Don't Get Cheated!
Pakistan Cables Pure Cu | Local CCA | Chinese Aluminum
✅ Conducts 100% | ❌ 70% Conductivity | ❌ 60%
✅ No Heat Buildup | ⚠️ Gets Hot | 🔥 Dangerous
✅ 30yr Lifespan | ❌ 8-10yr | ❌ 5yr
✅ Flame Safe | ⚠️ Melts Faster | ❌ Fire Hazard
✅ Full 90m Coil | ❌ Short 82m | ❌ 75m
Test pure copper: Magnet test (no attraction) + weight check (heavier)
Wire Installation Guide Pakistan (PEC Approved)
Cable Sizing Rules
Distance <20m → Use 1 size smaller
Distance >50m → Use 1 size larger
Ambient >40°C → Derate 15%
Bundled cables → Derate 20%
Conduit Sizing
1.5-2.5mm → 20mm conduit
4-6mm → 25-32mm conduit
10mm → 40mm conduit
Color Coding (Mandatory)
Red/Yellow/Blue = Live Phases
Black = Neutral
Green/Yellow = Earth
Pakistan Cables vs Newage/GM/Fast Cables
| Brand |
Copper Purity |
Coil Accuracy |
Warranty |
Price Premium |
| Pakistan Cables |
99.99% |
Exact 90m |
Lifetime |
Standard |
| Newage |
98-99% |
88-90m |
10yr |
10% less |
| GM Cables |
97% |
85-88m |
None |
20% less |
| Fast Cables |
96% |
82-87m |
None |
25% less |
Verdict: Pakistan Cables = long-term investment, others = short-term savings
Common Wiring Mistakes (Save Your House!)
❌ Using 3/29 for ACs → Breaker trips, fire risk
❌ Earth wire too small → Shock hazard
❌ No conduit protection → Insulation damage
❌ Loose MCB connections → Hotspots/melting
✅ Always oversize 1 step for future AC/solar additions
2026 Karachi Wire Prices (90m Coils)
1.5mm Solid: PKR 4,800
3/29: PKR 6,800
7/29 (2.5mm): PKR 12,200
4mm: PKR 16,500
6mm: PKR 24,000
10mm: PKR 38,500
FREE Karachi delivery on all orders!
Complete House Wiring Kit Calculator
100 sqm House (3BHK):
Main Panel: 10mm x 30m (2 runs)
DB Feeders: 6mm x 50m
Lighting: 3/29 x 200m
Sockets: 7/29 x 150m
Earthing: 1.5mm x 100m
Total: ~PKR 180,000 wires
Need exact quote? WhatsApp our wiring calculator!
Buy All Wires at ChachaTrader – One-Stop Electrical
SHOP PAKISTAN CABLES 1.5mm SOLID
SHOP 3/29 LIGHT WIRING
SHOP 7/29 AC WIRING
SHOP 4mm SOLAR WIRING
SHOP 6mm MAIN PANEL
SHOP 10mm INDUSTRIAL
Contractor Special: 5% off 10+ coils
