This part of PAS 5308 specifies requirements for and dimensions of polyethylene (PE) insulated control and instrumentation cables in multipair construction, with or without screens, and optionally incorporating a lead sheath and single wire armour.
It categorizes cables into:
a) type 1: PE insulated and PVC sheathed;
b) type 2: PE insulated, PE bedded, single wire armoured and PVC oversheathed; and
c) type 3: PE insulated, PVC bedded, lead alloy sheathed, single wire armoured and PVC oversheathed.
The cables are suitable for operation at voltages up to and including 300 V r.m.s. core to earth and 500 V r.m.s. core to core (i.e. 300/500 V).
These cables are not primarily intended for direct connection to a low impedance source, such as the public electricity supply.