Electrical DCC Copper Wire 100gm

Quick Answer: The Electrical DCC Copper Wire 100gm is double cotton covered copper wire supplied in a 100 g quantity for winding coils in physics experiments. The two layers of cotton insulate each turn from its neighbours, so the wire can be wound tightly into solenoids and electromagnets.

Cotton-Covered Winding Wire for the Physics Lab

A coil only works if current flows along the wire and not across from one turn to the next, so winding wire must be insulated. In DCC copper wire the insulation is two layers of cotton thread wrapped around the copper, which is easy to see, easy to strip and forgiving of rough handling on a school bench. Copper is used for the core because it has very low resistivity, so the coil draws a useful current from a few cells.

Compared with enamelled (super enamelled) copper wire, the cotton covering is thicker, so fewer turns fit in a given space and the coil is bulkier. The trade-off suits teaching: the insulation is visible, students can count turns easily, and the ends are stripped by unwinding the cotton rather than scraping enamel. Cotton does absorb moisture and char at high temperature, so the coils perform most reliably when dry and at modest currents.

The classic uses all involve electromagnetism. Wound on an iron nail it becomes a simple electromagnet; wound on a tube it becomes a solenoid for plotting field lines; and connected to a galvanometer it shows induced current when a magnet moves in or out. For a ready-made core, the U-Core Magnetic Field Apparatus shows the same principle on a larger scale.

Specifications

Care & Handling

• Keep the DCC copper wire reel in a closed bag in a dry cupboard; damp cotton insulation allows leakage between turns.
• Unwind from the reel rather than pulling loops off the side, which causes kinks.
• Do not leave coils connected to a supply; low-resistance windings heat quickly and can scorch the cotton.

Applications

• Winding electromagnets on iron nails or cores to study the effect of turns and current
• Making solenoids to plot the magnetic field with a compass
• Coils for electromagnetic induction with a galvanometer and bar magnet
• Building simple motors and search coils in project work

Why Choose LabEquip

Physics teachers buy winding wire by weight because every electromagnetism practical uses a different coil. LabEquip lists this DCC wire in the General Items range; tell the team how many benches you are supplying through the contact page.

Frequently Asked Questions

What does DCC mean on copper wire?

DCC stands for double cotton covered: the copper conductor is wrapped in two layers of cotton thread as insulation. It is a traditional winding wire for coils, electromagnets and transformers in teaching labs.

How is DCC wire different from enamelled copper wire?

Enamelled wire has a thin varnish coat, so more turns fit into a coil. DCC insulation is thicker and bulkier, but it is visible, easy to strip and tolerant of handling, which suits student practicals.

How do I strip the ends?

Unwind the cotton from the last two centimetres or so and trim it off. If the copper underneath looks dull, rub it bright with fine emery paper so the connection to a terminal or crocodile clip is good.

How many turns make a useful electromagnet?

There is no fixed number, but 50 to 100 turns on an iron nail driven by one or two cells will pick up paper clips. Doubling the turns or the current roughly doubles the magnetic effect, which students can test by counting clips.

Why does the coil get hot?

A short, thick copper coil has low resistance, so it draws a large current from the supply, and the current heats the wire. Use a series resistor or rheostat, switch on only while taking readings, and never leave a coil connected.

Which wire gauge is supplied?

The product name fixes the weight, not the thickness, so state the gauge you want when ordering. Thinner wire gives more turns and length per 100 g; thicker wire carries more current and heats less.

Last Updated: September 2026