18 Swg Tinned Copper Fuse Wire

Description

Technical Specifications

Based on industrial standards (IS: 9926), here is the performance breakdown for a single strand:

• Fusing Current: Approximately 82 Amps. This is the estimated current at which the wire will melt in free air.

• Safe Current Rating: 40 Amps. It is the standard wire choice for 40A Kit-Kat style porcelain fuse carriers.

• Resistance at 20°C: Approximately 0.0136 to 0.0143 $\Omega/m$.

• Material: High-conductivity copper with a tin coating, which resists corrosion and ensures easy soldering or termination.

Common Applications

• 40A Main Switches: Used in small workshops or large residential distribution boards.

• Heavy Domestic Appliances: Often used for circuits powering high-wattage equipment like central air conditioning units or large water pumps.

• Industrial Control Panels: Provides protection for internal control circuits that require a higher threshold than standard household electronics.

Purchasing Options in India

This wire is widely available from electrical wholesalers and industrial suppliers, typically sold by weight in reels.

Installation and Safety

• Capacity Check: Always ensure the fuse carrier is rated for at least 40A before using 18 SWG wire.

• Replacement Tip: If you are replacing a blown fuse, check the cause first. If 18 SWG wire has melted, it means the circuit drew over 80 Amps of current, which usually indicates a serious short circuit or major overload.

• Double Stranding: In some industrial cases, technicians double the wire to increase capacity. However, this is not recommended without proper engineering calculations, as it can change the fusing characteristics unpredictably.