What is BS EN 60664-5 - Insulation equipment in low voltage system about?
BS EN 60664-5 is a British Standard that states for insulation co-ordination for low voltage equipment.
BS EN 60664-5 is a part of the IEC 60664 series which specifies humidity levels regarding the effects of humidity on creepage distances. The information in BS EN 60664-5 is based on research data published in 1989.
Note: Table A.2 provides information on the dimensioning of creepage distances to maintain adequate insulation resistance for r.m.s. voltages up to 10 000 V, corresponding to creepage distances up to 250 mm.
Who is BS EN 60664-5 - Insulation equipment in low voltage system for?
BS EN 60664-5 on insulation equipment in low voltage system is useful for:
- Circuit Manufacturer
- Heating and Cooling Thermostat Manufacturer
- Sensors Manufacturer
- Automobile Manufacturers
Why should you use BS EN 60664-5 - Insulation equipment in low voltage system?
BS EN 60664-5 specifies humidity levels regarding the effects of humidity on creepage distances.
BS EN 60664-5 introduces the following dimensioning criteria which need to be considered:
- New minimum clearances having more precise values for dimensions up to 2 mm under pollution degrees 2 and 3 than those specified in Table F.2 of Part 1
- Smaller minimum creepage distances for printed wiring boards and equivalent constructions under pollution degree 3 than those specified in Table F.4 of Part 1
- A specification of minimum creepage distances to avoid flashover of the insulating surfaces, the values being based on the water adsorption characteristics of the material
- A specification of minimum creepage distances to ensure adequate insulation resistance under humid conditions
BS EN 60664-5 provides guidelines to manufacturers on how to use these insulation equipment in low voltage system to have best results. When these winding wires are handled according to the standards provided in BS EN 60664-5, it ensures smooth workflow and safety. 
What’s changed since the last update?
BS EN 60664-5:2007 supersedes EN 60664-5:2003, which is withdrawn.
BS EN 60664-5:2007 includes some technical changes with respect to EN 60664-5:2003. These include:
- Amendment of Japanese mains conditions with regard to the rated impulse voltages, the rationalized voltages and the nominal voltages of supply systems for different modes of overvoltage control
- Amendment of dimensioning of clearances smaller than 0,01 mm
- Alignment of the table and the corresponding formula regarding test voltages for verifying clearances at different altitudes
- Amendment of interpolation of the creepage distance values for functional insulation
- Revision of the former Clause 4 "Tests and measurements" (now Clause 6) to achieve a more detailed description of the tests and their purpose, the test equipment and possible alternatives
