Electrical Cable Insulation Types

X synthetic polymer flame resistant.

Electrical cable insulation types.

Composite insulators are less costly lighter in weight and have excellent hydrophobic capability. 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. W rated for wet locations. The exterior insulation on cloth or fabric insulated nmc electrical wires are often black silver or white but may also be black or brown.

Insulation on electrical wires is stamped with various codes and numbering that indicates the wire type and performance characteristics of the insulation. For example black and red wires typically are used for current carrying or hot connections and white wires usually are grounded neutral conductors. Thermo plastics such as polyvinyl chloride pvc and crosslinked poly ethylene s xlpe. Multiconductor construction should be used unless limited by physical factors.

First of all cable insulation. Understanding the basic markings helps you choose the right type of wire or cable for your project. Two or more stranded wires with flexible insulation for temporary use. The types of cables and wires that are used for communication or signal transmission purposes are.

Green insulated wires and bare copper wires are used for grounding wires. It is a flexible electrical cable with connectors on both ends to provide a temporary ac. The individual conductors within the cable may be insulated in rubber or fabric covered rubber or they may be insulated by plastic in later wiring products. Twice as thick in insulation but similar to po with silk or rayon top layer.

Usually a yellow green braided jacket green and yellow cord. Similarly nonmetallic nm cable which contains multiple wires has markings on the outer sheathing of the cable. Submarine cable generally consists of a lead sheathed cable and is usually armored. N nylon coated to resist damage from oil or gasoline.

Portable or extension cord. Shielded or screened cable. 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. Rough service wire but not as nice looking as po.

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. H heat resistant. Hh high heat resistance up to 194 degrees fahrenheit. Thermoset or thermoplastic dry use only.