Electrical Cable Insulation Types

Understanding the basic markings helps you choose the right type of wire or cable for your project.

Electrical cable insulation types.

Shielded or screened cable. Composite insulators are less costly lighter in weight and have excellent hydrophobic capability. T thermoplastic insulation. The types of cables and wires that are used for communication or signal transmission purposes are.

Similarly nonmetallic nm cable which contains multiple wires has markings on the outer sheathing of the cable. First of all cable insulation. Portable or extension cord. W rated for wet locations.

Raceways nec chapter 9 table 5 electrical wire types chart thhn vs xhhw what is the difference se cable acity according to the 2016 neets module proper sizing of conduits and raceways nec chapter 9 table 5sizing conductors electrical contractorproper sizing of conduits and raceways nec chapter 9 table 4wire and cableproper sizing of conduits read more. Rough service wire but not as nice looking as po. H heat resistant. Insulation on electrical wires is stamped with various codes and numbering that indicates the wire type and performance characteristics of the insulation.

It is a flexible electrical cable with connectors on both ends to provide a temporary ac. Hh high heat resistance up to 194 degrees fahrenheit. Usually a yellow green braided jacket green and yellow cord. X synthetic polymer flame resistant.

Tape insulation such as impregnated paper or varnish paper rubber or rubber like synthetic compounds such as silicone rubber butyl rubber and oil based rubber. Thermoset or thermoplastic dry use only. Insulation material should be xlp or epr except when paper insulation is justified because of its high resistance to and freedom from internal discharge or corona. Submarine cable generally consists of a lead sheathed cable and is usually armored.

Two or more stranded wires with flexible insulation for temporary use. Types of cables and wires communications cable. Thermo plastics such as polyvinyl chloride pvc and crosslinked poly ethylene s xlpe. The exterior insulation on cloth or fabric insulated nmc electrical wires are often black silver or white but may also be black or brown.

Multiconductor construction should be used unless limited by physical factors. These are typically composed of a central rod made of fibre reinforced plastic and an outer weathershed made of silicone rubber or ethylene propylene diene monomer rubber epdm. Twice as thick in insulation but similar to po with silk or rayon top layer. For example black and red wires typically are used for current carrying or hot connections and white wires usually are grounded neutral conductors.