What is the size of WASP conductor?

7/3.40 mm Al — 63.55 mm² of aluminium, 63.55 mm² total, with an overall diameter of 10.2 mm.

What is the weight of WASP conductor per km?

174 kg per km, so a 1 km drum weighs about 0.17 tonnes.

What is the resistance of WASP conductor?

0.4626 Ω/km DC at 20 °C. At 75 °C the AC resistance rises to roughly 0.5934 Ω/km once skin effect is included.

AAC conductor · 60 mm² nominal

WASP Conductor — Specification & Current Carrying Capacity

Q: What is the current carrying capacity of WASP conductor?

About 225 A. That figure assumes Ambient 40 °C, maximum conductor temperature 75 °C, cross-wind 0.61 m/s, solar radiation 1000 W/m², emissivity 0.9, absorptivity 0.8, outdoor overhead installation (IEEE 738 / IS 398 practice).

7/3.40 mm Al · 63.55 mm² total area · 10.20 mm overall diameter · 174 kg/km · 0.4626 Ω/km at 20 °C · 10.20 kN breaking load · about 225 A.

LT mains and short 11 kV spans in polluted or coastal environments.

Calculate WASP ampacity Compare with other conductors

Full technical specification

Data basis: IS 398 and standard manufacturer catalogues. Individual manufacturers vary slightly — confirm against the supplier datasheet before final design.

Code name	WASP
Family	AAC
Material	All-aluminium stranded conductor (no steel core)
Stranding	7/3.40 mm Al
Aluminium strands	7 × 3.4 mm
Steel strands	None
Aluminium area	63.55 mm²
Steel area	—
Total area	63.55 mm²
Nominal (trade) area	60 mm²
Overall diameter	10.20 mm
Approximate weight	174 kg/km
DC resistance at 20 °C	0.4626 Ω/km
Calculated AC resistance at 75 °C	0.5934 Ω/km
Ultimate breaking load	10.20 kN
Current carrying capacity	225 A (standard basis)

Construction of WASP

WASP is built as 7/3.40 mm Al. All-aluminium stranded conductor (no steel core). With no steel core the whole cross-section conducts, giving the lowest resistance per mm² of any of the families, at the cost of breaking load. The total metallic area of 63.55 mm² and overall diameter of 10.20 mm set both the resistance and the wind/ice loading the structures must carry.

Where WASP is used

LT mains and short 11 kV spans in polluted or coastal environments. At 225 A on the standard basis, a three-phase circuit of WASP carries roughly 4 MVA at 11 kV, 13 MVA at 33 kV and 51 MVA at 132 kV — useful as a first sanity check before detailed load flow.

Conditions behind the current rating

Ambient 40 °C, maximum conductor temperature 75 °C, cross-wind 0.61 m/s, solar radiation 1000 W/m², emissivity 0.9, absorptivity 0.8, outdoor overhead installation (IEEE 738 / IS 398 practice).

Wind is the single biggest variable. Removing it drops the rating of WASP from 220 A to 113 A in the cases above.
Raising the permitted conductor temperature increases the rating, but sag and long-term annealing of the aluminium set the practical ceiling — 75 °C continuous is the usual limit.
A weathered, dark conductor absorbs more sunlight but also radiates heat better; the standard 0.8 absorptivity / 0.9 emissivity pair is the conservative combination.
Terminations, jumpers and clamps often limit a line before the conductor does. Check the whole current path, not only the span.

Other AAC conductors

ANT

7/2.21 mm Al · 130 A

GNAT

7/2.59 mm Al · 160 A

Calculators for this conductor

Conductor Current Capacity Calculator

Recalculate WASP ampacity for your own weather and temperature limit.

Voltage Drop Calculator

Check the drop over the span length you are planning.

AWG to sq mm Converter

Translate the area into American gauge sizes.

Transformer Sizing Calculator

Match the feeder to the transformer it supplies.

AC Cable Sizing Calculator

For the insulated cable portions of the same circuit.

Wire Gauge Chart

AWG to mm² reference table.