BS 7870-4.10:2011+A1:2016

LV and MV polymeric insulated cables for use by distribution and generation utilities. Specification for distribution cables with extruded insulation of rated voltages of 11 kV to 33 kV | Status: Confirmed, Current

1 Scope This section of BS 7870 specifies requirements for the construction, dimensions and mechanical and electrical properties of 6.35/11(12) kV to 19/33(36) kV single-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:

1. a) medium density polyethylene (MDPE) compound type DMP 5 (Type A cables);
2. b) thermoplastic compound type DMZ 4 for cables with having a low emission of smoke and corrosive gases when affected by fire (Type B cables).

The standard also specifies requirements for 11 kV cables laid up in a triplex formation. 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.

NOTE 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.