IEC 60702-1 pdf download Mineral insulated cables and their terminations with a rated voltage not exceeding 750 V – Part 1: Cables
This standard applies to mineral insulated general wiring cables with copper or copper alloysheath and copper conductors and with rated voltages of 500 V and 750 V.Provision is madefor a corrosion-resistant extruded outer covering over the copper sheath,when required.Thisouter covering is not specified for the purpose of electrical insulation of the metal sheath.
Requirements for terminations for use with these cables are specified in lEC 60702-2.
The purpose of this standard is to specify mineral insulated cables that are safe and reliablewhen properly used, to state the manufacturing requirements and characteristics to achievethis, and to specify methods for checking conformity with those requirements.
The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60227-1:1993，Polyvinyl chloride insulated cables of rated voltages up to and including450/750 v- Part 1: General requirements
IEC 60228:1978,Conductors of insulated cables
IEC 60331-21:1999,Tests for electric cables under fire conditions – Circuit integrity -Part 21:Procedures and requirements – Cables of rated voltage up to and including 0,6/1,o kv
IEC 60332-1:1993,Tests on electric cables under fire conditions – Part 1: Test on a singlevertical insulated wire or cable
IEC 60702-2:2002，Mineral insulated cables and their terminations with a rated voltage notexceeding 750 v- Part 2: Terminations
IEC 60754-2:1991,Test on gases evolved during combustion of electric cables – Part 2:Determination of degree of acidity of gases evolved during the combustion of materials takenfrom electric cables by measuring pH and conductivity
IEC 60811-1-1:1993,Common test methods for insulating and sheathing materials of electriccables and optical cables – Part 1: Methods for general application – Section 1: Measurementof thickness and overall dimensions – Tests for determining the mechanical properties
For the purpose of this part of lEC 60702, the following definitions apply.
value by which a quantity is designated and which is often used in tables. Usually，in thisstandard，nominal values give rise to values to be checked by measurements，taking intoaccount specified tolerances
routine tests (symbol R)
tests made by the manufacturer on each manufactured length of cable to check that the wholeof each length meets the specified requirements
sample tests (symbol s)
tests made by the manufacturer on samples of completed cable，or components from acompleted cable, at a planned frequency, so as to verify that the finished product meets thespecified requirements
type tests (symbol T)
tests made before supplying, on a general commercial basis, a type of cable covered by thisstandard,in order to demonstrate satisfactory performance characteristics to meet theintended application.These tests are such that, after they have been made, they need not berepeated unless changes are made in the cable material,design or manufacturing processwhich might change the performance characteristics
4 Voltage designations
The rated voltages of the cables considered in this standard are as follows.
4.1500 v cable (light duty grade)
For use where the voltage between conductors and sheath and between conductors does notexceed 500 v r.m.s. or 500 v d.c.