DATA, AUDIO & INSTRUMENTATION CABLE GLOSSARY OF TERMS & REFERENCE STANDARDS

GLOSSARY OF TERMS - DATA, AUDIO & INSTRUMENTATION CABLE

ATTENUATION – The power drop or signal loss in a circuit, expressed in decibels (db). Generally attenuation increases (signal level decreases) with both frequency and cable length.

AWG – Abbreviation for American Wire Gauge. A standard measurement for a size of a conductor.

BUS – A network which functions like a signal line and is shared by a number of nodes.

CAPACITANCE (CAPACITY) – That property of a system of conductors and a dielectric which permits the storage of electricity when potential difference exists between the conductors. A capacitance value is always positive.

DECIBEL (dB) – One-tenth of a bel. Unit to express differences of power level. Example: The decibel is 10 times the common logarithm of the power ratio. It is used to express power gain in amplifiers or power loss in passive circuits or cables.

EMC – Electromagnetic Compatibility (EMV). Ability to withstand electromagnetic interference and emissions (i.e. noise and interference from cables, wires and P.C.B. traces).

IMPEDANCE – Resistance to flow of an alternating current at a particular frequency, expressed in ohms. It is a combination of resistance R and reactance X, measured in ohms.

INDUCTANCE – Is a measure of the amount of magnetic flux (quantity of magnetism) produced for a given electric current. OHM (Ω) – The electrical unit of resistance. The value of resistance through which a potential difference of one volt will maintain a current of one ampere.

POLYESTER (PETP) – Pure hydrocarbon resins with excellent dielectric properties, i.e. Low dielectric constant, low dielectric loss across the frequency spectrum, mechanically rugged and resists abrasion and cold flow. The insulating materials derived from polymerization of lower molecular weight molecules.

POLYETHYLENE (PE) – This material is basically pure hydrocarbon resins with excellent dielectric properties, i.e. low dielectric constant, low dielectric loss across the frequency spectrum, mechanically rugged and resists abrasion and cold flow. The insulating materials derived from polymerization of ethylene gas.

POLYPROPYLENE (PP) – A thermoplastic similar to polyethylene but stiffer and having higher softening point (temperature); excellent electrical properties.

RESISTANCE – Property of an electric circuit which electric energy is converted into a heat and has a value measured in ohms.

RMS (Root Mean Square) – The effective value of an alternating current or voltage.

S-PVC – Is used for core insulation and sheathing purposes. The core insulation is particularly flexible and has very good electrical characteristics. The sheath material has excellent mechanical characteristics and high flexibility.

CABLE STANDARDS REFERENCED WITHIN THIS CATALOGUE

AS/NZS 1125 – Conductors in insulated electric cables and flexible cords.

AS/NZS 3191 – Electric flexible cords.

AS/NZS 3808 – Insulating & sheathing materials for electric cables.

AS/NZS 1660 – Test methods for electrical cables, cords and conductors - Conductors and metallic components.

AS/NZS 3008 – Electrical installations - Selection of cables - Cables for alternating voltages up to and including 0.6/1kV - Typical New Zealand conditions.

AS/NZS 5000.1 – Electric cables, polymeric insulated - for working voltages up to and including 0.6/1kV 

IEC 60332 – Test on electric cables under fire conditions.

IEC 60331 – Fire resisting characteristics of electrical cables

IEC 60092-350 – Shipboard power cables. General construction and test requirements.

IEC 60092-351 – Insulating materials for shipboard and offshore units, power, control, instrumentation, telecommunication and data cables

IEC 60092-352 – Choice and installation of electrical cables

IEC 60092-353 – Single and multicore non-radial field power cables with extruded solid insulation for rated voltages 1kV and 3kV.

IEC 60092-359 – Sheathing materials for shipboard power and telecommunication cables.

IEC 60228 – Conductors of insulated cables.

IEC 60332-1 – Test for vertical flame propagation for a single insulated wire or cable - Apparatus

IEC 60332-2-2 – Test for vertical flame propagation for a single small insulated wire or cable - Procedure for diffusion flame.

IEC 60332-3 CAT A – Test for vertical flame spread of vertically-mounted bunched wires or cables - Apparatus (CAT A, 7 litres of combustible material exposed to flame for 40 minutes).

IEC 60502-1 – Power cables with extruded insulation and their accessories for rated voltages from 1kV (Um=1,2kV) up to 30kV (Um=36).

IEC 60754 – Test on gases evolved during combustion of materials from cables - Part 1: Determination of the amount of halogen acid gas.

IEC 61034 – Measurement of smoke density of cables burning under defined conditions.

IEC 60754-1 – T est on gases evolved during combustion of materials from cables - Part 1: Determination of the amount of halogen acid gas.

IEC 60754-2 – Test on gases evolved during combustion of electric cables - Part 2: Determination of degree of acidity of gases evolved during the combustion of materials taken from electric cables by measuring pH and conductivity.

IEC 60092-3 – Electrical insulation in ships, equipment, generators and motor equipment

Firstflex has taken every precaution to ensure accurate information in this catalogue but accept no liability for any errors or omissions. Firstflex reserves the right to modify specifications at any time.