Can 7/29 Wire Run a 1.5 Ton AC? The Honest Answer

“7/29 wire 1.5 ton AC ke liye chal jayegi?” is one of the most searched wiring questions in Pakistan. Many electricians say yes, many say no, and both have a point. The honest answer is: 7/29 can carry the running current of a 1.5 ton AC, but it is not the size we recommend for most homes. This guide explains why, with simple numbers, and tells you when 7/29 is acceptable and when you should use 7/36 (4 mm²).

The Short Answer

The Numbers Behind the Answer

• 7/29 wire: about 3 mm² of copper, roughly 22 to 27 A in conduit. See 7/29 wire load capacity.
• 1.5 ton AC running current: about 1,500 to 2,400 W, which is roughly 7 to 11 A at 230 V.
• Starting current: non-inverter ACs pull several times their running current for a moment when the compressor starts. Inverter ACs start gently.

On paper, 7/29 carries a 1.5 ton AC comfortably. So why recommend 7/36?

4 Reasons We Recommend 7/36 (4 mm²) for a 1.5 Ton AC

1. Pakistani summers are hard on wiring

An AC runs for 8 to 12 hours a day in June and July, exactly when roof slabs and walls are at their hottest. Hot wires carry less current safely. The extra copper in 7/36 keeps the line cooler during those long hours.

2. Voltage drop on longer runs

Outdoor units are often on the roof or far from the DB. Over longer distances, a thinner wire loses more voltage. Low voltage makes the compressor work harder and can cause inverter AC error codes. 7/36 keeps the voltage steadier.

3. Starting surge

Non-inverter ACs pull a strong surge at every start. A heavier wire handles these repeated surges with less heating at joints and terminals.

4. Future upgrades

Many families replace a 1.5 ton AC with a 2 ton model later. A 7/36 line is ready for that. A 7/29 line may need to be rewired, which means breaking walls.

If You Do Use 7/29 for an AC

If the run is short and the AC is an inverter model, 7/29 can work. Follow these rules:

1. Dedicated line only. The AC must have its own circuit from the DB, never shared with sockets.
2. Correct breaker. Use the breaker your electrician recommends for 7/29, usually 16 A to 20 A. Never a bigger one.
3. Genuine wire. It must be real 7/29: 7 strands of 0.029 inch pure copper. Undersized or impure wire is the most common reason AC lines burn. See how to identify fake wire.
4. Tight terminals and a proper socket or isolator at the AC.
5. Earth connected to the AC body.

Wire Size for Other AC Sizes

For more detail, read which wire size is best for AC in Pakistan and wire size for inverter AC.

Price Difference: Is 7/36 Worth It?

An AC line is usually a short run of a few coils’ worth of wire at most. The extra cost of 7/36 over 7/29 for one AC line is small compared with the cost of an AC, a burnt socket or breaking walls to rewire later. For most homes, it is money well spent.

Thrive Cables 7/29 and 7/36 Wire

Thrive Cables makes both 7/29 and 7/36 (4 mm²) in Lahore with 99.9% pure copper, 7 full-thickness strands and fire-retardant PVC insulation. Ask for factory price on WhatsApp at +92 324 6570645.

Frequently Asked Questions

Can 7/29 wire run a 1.5 ton AC?

It can carry the running current of a 1.5 ton inverter AC on a short dedicated line, but 7/36 (4 mm²) is the safer and recommended choice for most homes.

Which wire is best for a 1.5 ton AC in Pakistan?

7/36 (4 mm²) on its own line with a 20 A breaker is the usual recommendation.

Can I run two ACs on one 7/29 line?

No. Each AC should have its own line and breaker.

Does an inverter AC need a thinner wire?

No. It uses less power on average but can still draw high current on hot afternoons. Size the line for that maximum.

Conclusion

7/29 is strong enough on paper for the running current of a 1.5 ton AC, and it can work on a short dedicated line for an inverter model. But hot summers, long runs, starting surges and future upgrades make 7/36 (4 mm²) the better choice for most Pakistani homes. Whatever you choose, give the AC its own line, the right breaker, a proper earth and genuine pure copper wire.