Includes incidental wire stranding.

Code 4470 applies to employers engaged in manufacturing insulated electrical wire and/or the insulating or covering of wire.  Raw materials such as drawn wire (copper and aluminum) and insulating material such as rubber, plastic, cotton thread, paper, vinyl, lacquer and enamel are purchased from outside suppliers.  Various gauges and types of wire can be insulated using various types of insulating materials.  The most common types of wire that are insulated are copper and aluminum.  The wire is insulated using extruding machines.  

This classification also includes employers engaged in covering wire with plastic or rubber insulation coverings.  The insulated electrical wire is inspected to assure quality. It is then wound on spools to be sold to the employer’s customers.