BS 7870-4.20:2011+A1:2016
$142.49
LV and MV polymeric insulated cables for use by distribution and generation utilities – Specification for distribution cables with extruded insulation for rated voltages of 11 kV to 33 kV – Three-core 11 kV cables (Implementation of HD 620)
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 28 |
This section of BS 7870 specifies requirements for the construction, dimensions and mechanical and electrical properties of 6.35/11(12) kV three-core cables having either aluminium or copper conductors, cross-linked polyethylene (XLPE) or ethylene propylene rubber (EPR) extruded insulation, a copper wire metallic screen and an oversheath of one of the following compounds.
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medium density polyethylene (MDPE) compound type DMP 5 (Type A cables);
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thermoplastic compound type DMZ 4 for cables having a low emission of smoke and corrosive gases when affected by fire (Type B cables).
This section of BS 7870 is applicable to cables that are designed for a maximum continuous conductor operating temperature of 90 °C and for a maximum short-circuit conductor temperature of 250 °C.
Information to be supplied by the purchaser, and items to be agreed between the purchaser and the manufacturer at the time of enquiry and/or order are given in Annex B. Guidance on type testing is given in Annex C.
