Copper Modi Polyester Wire 155 Class

What Is Copper Modi Polyester Wire 155 Class?

Copper Modi Polyester Wire is an enameled copper wire. A thin coat of modified polyester enamel covers the copper conductor and acts as insulation. This coat keeps each turn of a coil apart from the next, so current follows the wire and does not jump between turns.

The enamel on this grade is made for a higher heat level than our 130 class wire. That extra thermal margin makes it a good match for machines that work harder or run for longer periods. At the same time, it keeps the smooth finish and steady diameter that winding crews expect from a good enameled wire.

You may also see this product called copper modified polyester winding wire, 155 degree copper polyester wire or Class 155 copper modified polyester wire. All of these names describe the same type of wire.

Key Features

These are the main features of our copper modified polyester wire in 155 class:

• Rated for 155 class: the enamel is built for a higher working temperature than 130 class.

• Reliable insulation: the modified polyester coat protects against short circuits between turns.

• Mechanical strength: the coat holds up during winding, bending and handling.

• Smooth surface: the wire runs easily through guides and winding machines.

• Consistent diameter: coils lay down in neat layers with steady electrical performance.

• Good resistance: it stands up to moisture, rubbing and most solvents.

What the 155 Class Rating Means

Every enameled wire has a thermal class. The class shows the heat level that the enamel is built to handle in normal work. A higher number means the wire can work in hotter conditions. A 155 class wire can handle more heat than a 130 class wire, which gives you a wider safety margin.

Why does this matter? A motor is not at room temperature while it works. The coil sits in the middle of the machine and heats up with every minute of use. If the wire is chosen too close to its limit, the enamel slowly breaks down, and the coil can fail early. A wire with more headroom lasts longer under the same load.

The rating is not a reason to run a coil hot. It is a margin of safety. Choose the class based on the real temperature your coil reaches, and leave some room above it.

Where Copper Modi Polyester Wire 155 Class Is Used

This copper polyester wire fits many winding jobs where the heat is higher than in light-duty products. Typical uses include:

• Electric motors for pumps, fans and general machines

• Motors that run for long hours at steady load

• Distribution and small to medium transformers

• Relays, contactors and solenoids

• Chokes and electromagnetic coils

• Household and industrial appliances

In each case the wire does the same basic job. It carries current through many tight turns while keeping them insulated. The 155 class simply gives the coil more thermal comfort while it does so.

Benefits of Using Copper Modified Polyester Winding Wire

More heat headroom. The 155 class gives a wider margin than 130 class, which helps coils last when the machine runs warm.

Dependable insulation. The enamel keeps turns apart, which lowers the chance of short circuits inside the coil.

Easy winding. A smooth surface reduces friction, so your machines run with fewer breaks and untidy layers.

Steady results. An even diameter means each coil behaves like the last, which helps in large production runs.

Good protection. The enamel resists moisture, rubbing and most solvents through winding, varnishing and use.

Good value. You get a higher heat rating without moving up to the most demanding and costly grades.

Copper conductivity. Copper carries current well, so coils can stay compact. If weight and cost matter more for your product, compare it with our super enameled aluminum winding wires.

155 Class or 130 Class? How to Choose

A few simple checks will help you pick the right grade:

1. Check the working temperature. Estimate the real temperature of the coil under full load. Pick a class that sits comfortably above it.

2. Think about the duty. A machine that runs for long hours needs more headroom than one used for short periods.

3. Check the surroundings. A hot room, poor airflow or a closed housing all raise coil temperature.

4. Match the wire size to the load. The conductor must be thick enough for the current your coil carries.

5. Balance cost and risk. If the coil stays cool, 130 class may be enough. If it runs warm, 155 class is the safer choice.

For lighter duty, see our copper modi polyester wire 130 class. To compare every grade we make, visit our super enameled copper winding wires page. If you are unsure, tell us about your product and our team will suggest a class.

Winding and Handling Tips

Even good wire can be damaged by poor handling. These habits protect the enamel:

• Store spools in a dry, clean place away from moisture and heat.

• Keep them away from oil and strong chemicals.

• Do not drag the wire over rough or sharp edges.

• Avoid sharp bends and sudden pulls while winding.

• Keep the winding tension even so the enamel does not crack.

• Handle spools by the flange, not by the wire.

• Cover opened spools when they are not in use.

Good habits cost nothing, and they prevent most insulation faults before the coil is even finished.

Why Buy from Apple Insulated Wires?

With over 25 years in the wire and cable industry, Apple Insulated Wires Pvt. Ltd. knows that makers need wire that behaves the same way in every batch. As a copper modified polyester wire manufacturer and copper polyester wire supplier, we give small and large orders the same care.

• Known standards: our enameled wires are made to IS 13730, IEC 60317 and NEMA MW1000.

• Tested in our own lab: every product is checked in-house before it ships.

• Made to your needs: we can adjust thermal class, insulation type and conductor size.

• Clean processes: our work is RoHS compliant and eco-friendly.

• Bulk supply: we supply large quantities at competitive prices.

• India and export: we pack with care and prepare the documents needed for export.

• Helpful support: our team is ready to answer your questions.

Get a Quote

Copper Modi Polyester Wire 155 Class is a dependable choice for motors, transformers, relays and appliances that need more heat headroom. If you want to know the sizes available or need help choosing a class, our team will guide you. Call or message us on +91 9624471888. You can also write to info@applewires.com.