IEC 60702-2:2002 pdf free download

IEC 60702-2:2002 pdf free download Mineral insulated cables and their terminations with a rated voltage not exceeding 750 V — Part 2: Terminations
4 Marking
4.1 Marking of packages
Packages in which terminations or parts of terminations are supplied shall be marked with the following particulars:
a) the number of this standard;
b) a means of identifying the manufacturer or supplier;
c) the maximum and minimum operating temperature of the seals;
d) a mark or means of identifying the cables for which it is intended;
e) whether a protective conductor is provided;
f) gland thread form and size.
4.2 Marking of seals and glands
Seals and glands shall be marked with a means of identifying the cable or cables for which they are intended. In addition, glands certified for use in hazardous areas shall be marked in accordance with IEC 60079-0.
5 Construction
5.1 Seals
5.1.1 Material A seal shall consist of a moisture-resistant sealing material contained, if necessary, within a suitable enclosure, and shall provide electrical insulation for the cable conductors.
5.1 .2 Connection A protective conductor may be connected to a metallic sealing enclosure by any suitable method (e.g. welding, brazing, crimping or soldering), or it may be connected directly on the metal sheath by any suitable attachment (e.g. clip or clamp). The size of the protective conductor shall be in accordance with IEC 60364-5-54, and the attachment shall meet the electrical continuity test requirement specified in 6.4.1 .
5.1.3 Explosive atmospheres
A seal for use in potentially explosive atmospheres shall, in addition to complying with therequirements of this standard, also satisfy the appropriate requirements specified in iEC 60079-0.
5.1.4Corrosion resistance
A seal or enclosure shall be made from material which will ensure freedom from corrosionarising from electrolytic action.
5.1.5 Test requirements
The material used in the seal shall be such that the completed seal is capable of meeting thetest requirements specified in this standard.
5.1.6Operating temperature
The conductor insulation shall be suitable for the range of operating temperatures stated forthe seal by the manufacturer.
5.2Glands
5.2.1 Material
A gland may be of any suitable material providing that it ensures freedom from corrosionarising from electrolytic action and meets the test requirements specified in this standard.
5.2.2 Thread form
The gland entry threads shall have a preferred thread form in accordance with those specifiedfor conduit in IEC 60423.Other threads are permitted provided that the gland complies withall the other requirements of this standard.
5.2.3 Entry thread length
The length of gland entry threads shall be not less than 8 mm.5.2.4Explosive atmospheres
Glands for use in potentially explosive atmospheres shall, in addition to complying withthe requirements of this standard，also satisfy the appropriate requirements specified inIEC 6oo79-o.