This Defence Standard specifies the requirements for flexible
cables and wires used for the interconnection of ground equipment,
and for providing ground power supplies to aircraft, vehicles and
other equipment used by the MOD. Cables and wires listed in table
IA and ID and IIA and IIB have an overall elastomeric sheath of
heavy duty, heat resistant, oil resistant and flame retardant
these cables and wires are suitable for use at voltages up to
500 V rms (where the conductor size is 2.5 mm2 a or
less), or 750 V rms (where the conductor size is 4 mm2
or greater), at frequencies up to 400 Hz, and where the combination
of ambient temperature and temperature rise due to the current
produces a stabilized conductor temperature not exceeding
85oC.These cables and wires are suitable for deployment
and recovery at temperatures down to -34oc.
Tables IA and IB list flexible cables and wires for the general
interconnection of electrical equipment or provision of ground
supplies. Tables IC and Id deal more specifically with flexible
cables for ground supplies to aircraft and other vehicles on
airfields, and incorporate monitoring and control cores or a pilot
core. Tables IB and ID specify a metal braid between inner and
overall sheaths, to provide improved mechanical protection and
earth fault impedance. Table IE list flexible cables unscreened, of
reduced weight and diameter for field power distribution some of
which incorporate pilot conductors.
Tables IIA and IIB list items to be used for maintenance
purposes only. This Standard does not include a Table III listing
items which are no longer to be provisioned but attention is drawn
to the historical record on the opposite page.
This Standard covers six types of cables and wires, as
Cables, power, electrical (unscreened). Two to four cores
inclusive. See Table IA and IIA.
Cables, power, electrical (collectively screened). Two, four or
five cores. See Tables IB and IIB.
Cables, power, electrical (unscreened). Two or four power cores.
With additional monitoring or control cores. See Table IC.
Cables, power, electrical (collectively screened). Two or four
power cores. With additional monitoring core. See Table ID.
Wires, electrical. See Table IA.
Cables power electrical unscreened, single core, three and five
core with and without pilot cores. See table IE.
A cross reference to the cables and wires formerly covered by
the EL Specifications which have been superseded by this Standard
appears in Annex A.