Cables

Insulation Materials And Their Properties

Common Name Material Temperature Range Features
ETFE Ethylene tetraflouroethylene -70 to +150 Used in wire-wrap applications.
MG Mica glass 450
  • Used in high-temperature applications
  • Excellent thermal stability
mPPE Modified polyphenylene ether -40 to +105
  • Excellent recyclability
  • Excellent abrasion and cut-through resistance
  • Superior dielectic properties to PVC, allows wires to be 45% smaller in diameter and 40% lighter in weight
PDVF Polyvinylidene fluoride -40 to +125 Used in wire-wrap applications.
PTFE Polytetrafluoroethylene -55 to +200
  • High temperature range
  • Excellent chemical and solvent resistance
  • Excellent electrical properties
Silicone Silicone -40 to +150
  • High-voltage capability
  • Excellent flexibility
  • Excellent dielectric strength
  • Chemical resistance to radiation, corona and ozone
TGGT Teflon-glass-glass-Teflon +250
  • Suitable for high-temperature applications
  • Excellent chemical and solvent resistance
  • Moisture resistant
  • Handles repeated flexing
XL-PVC Cross-linked PVC -55 to 105
  • Better abrasion and cut-through resistance than standard PVC
  • Improved temperature resistance over standard PVC
  • Used in high-density wiring
XLPE Cross-linked polyethylene -55 to 125
  • Higher temperature rating than PVC

Standards

NEC

The National Electrical Code (NEC) is an American standards body which defines a set of standards for certain types of cabling and how they should be installed and used.

NEC types are acronyms consisting of a prefix describing cable type (e.g. coax, CATV, fiber optic) and a suffix indicating the type of flame test it has passed and where it can be installed.

A summary of the cable types and flame tests from NEC. Image from http://www.associatedtelephone.com/.
A summary of the cable types and flame tests from NEC. Image from http://www.associatedtelephone.com/.

Computer Cable

Overview

Computer cable can also be called “Security” or “Alarm” cable.

AWM

Underwriters Laboratories categorises some computer cable as appliance wiring material (AWM). It has become an industry standard. There are 5 different style numbers.

AWM cable is designed for the internal wiring of factory-assembled, “listed” appliances such as computers, whitewear, and industrial equipment.

UL2464

UL2464 is a loose standard defining some of the properties of computer cable, maintained by Underwriters Laboratories.

Rated Temperature 80°C
Rated Voltage 300V
Lay Not specified (circular is common)
   
   
   
   

Reference standard: UL Subject 758, UL 1581 & CSA C22.2 No.210.2 – Stranded, bare or tinned copper conductor – Colour-coded SR-PVC insulation – Cores cabled under aluminum mylar shield – Tinned or bare copper stranded drain wire – Tinned or bare copper wire braid shield up to 95% coverage – Lead free PVC jacket – Passes UL VW-1SC & CSA FT1 vertical flame test

Features Specifications: UL2464 Double Shielded Computer Cables – Rated temperature: 80°C – Rated voltage: 300V – Reference standard: UL Subject 758, UL 1581 & CSA C22.2 No.210.2 – Stranded, bare or tinned copper conductor – Colour-coded SR-PVC insulation – Cores cabled under aluminum mylar shield – Tinned or bare copper stranded drain wire – Tinned or bare copper wire braid shield up to 95% coverage – Lead free PVC jacket – Passes UL VW-1SC & CSA FT1 vertical flame test Common Colours In UL2464 Cable:

  • Black
  • Brown
  • Red
  • Orange
  • Yellow
  • Green
  • Blue
  • Purple
  • Gray
  • White
  • Pink
  • Light Green
  • Black-White

Common Colours For 12 Core Cable

  • Black
  • Yellow
  • Red
  • Blue
  • Green
  • Yellow
  • White
  • Brown
  • Violet
  • Orange
  • Pink
  • Light Green
  • Grey

Posted: November 22nd, 2012 at 8:50 am
Last Updated on: March 7th, 2016 at 2:50 pm