IEC 60465 Specification for Unused insulating mineral oils for cables with oil ducts
Section 1. General
1 Scope
1.1 This standard covers specifications and test methods for unused mineral insulating oils, as delivered, intended for use in cables with oil ducts. These include hollow core cables, pipe type cables and any others in which provision is made for the oil to flow. Oils concerned are obtained by distillation and refining of petroleum. Oils with and without additives are within the scope of this standard.

1.2 This standard does not apply to mineral insulating oils used in transformers, switchgear, capacitors and similar equipment or to hydrocarbon insulating liquids obtained by synthesis.

1.3 For the purposes of this standard three grades of oil are considered: class I, class II and class III, based on the values of certain physical properties namely: viscosity, flash-point and pour-point.

2 Definition
2.1 additive
a suitable substance, which is deliberately added to an insulating liquid in small proportion in order to improve certain characteristics

3 Identification and general delivery requirements
3.1 Oil is normally delivered in road tankers or rail tank-cars or in drums, which shall be specially cleaned for this purpose.

3.2 The drums and containers of oil samples shipped by the oil supplier shall carry at least the following markings:
- number of this standard;
- supplier's designation;
- class of oil.

3.3 Each oil delivery shall be accompanied by a document from the supplier specifying at least: supplier's designation, oil class and the nature of any additive present.

If an anti-oxidant additive or a pour-point depressant is included in an oil formulation this shall be done by agreement between purchaser and supplier; in this case the nature of both additives shall be made known to the purchaser.

NOTE The purchaser may require that no major changes in crude oil type or refining process may be made without the purchaser being informed.

4 Sampling
Sampling shall be carried out in accordance with the procedure described in IEC Publication 475.