IEC 60664-5 Insulation coordination for equipment within low-voltage systems – Part 5: Comprehensive method for determining clearances and creepage distances equal to or less than 2 mm

	Purchase Information Use this form to request purchase information on IEC online subscriptions. IEC Collections First Name: Last Name: Email address:

Document IEC 60664-5 is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.

You may also purchase this document alone from the IHS Standards Store.

IEC 60664-5 Document Information:

Title
Insulation coordination for equipment within low-voltage systems – Part 5: Comprehensive method for determining clearances and creepage distances equal to or less than 2 mm

Coordination de l'isolement des matériels dans les systèmes (réseaux) à basse tension – Partie 5: Méthode détaillée de détermination des distances d’isolement dans l’air et des lignes de fuite inférieures ou égales à 2 mm

International Electrotechnical Commission

Publication Date:
Jul 1, 2007

Scope:

This part of IEC 60664 specifies the dimensioning of clearances and creepage distances for spacings equal to or less than 2 mm for printed wiring board and equivalent constructions, where the clearance and the creepage distance are identical and are along the surface of solid insulation, such as the paths described in example 1, example 5 and example 11 of 4.2 of Part 1.

The dimensioning is more precise than that provided by Part 1¹.

NOTE 1 If the precision provided by this standard is not required, Part 1 may be applied instead.

This standard can only be used as an entirety. It is not permitted to select one or more clauses from this standard and to use them in place of the corresponding clauses of Part 1.

When this standard is applied to the dimensioning of clearances and creepage distances, all clauses shall be used in place of the corresponding clauses given in Part 1. For clearances and creepage distances larger than 2 mm and for solid insulation in general, Part 1 applies.

NOTE 2 The limitation to distances equal to or less than 2 mm applies to basic or supplementary insulation. The total distance of a reinforced or double insulation may be larger than 2 mm.

This standard is based on the following criteria for dimensioning:

– minimum clearances independent of the micro-environment (see Table 2);

– minimum creepage distances for pollution degrees 1, 2 and 3 to avoid failure due to tracking (see Table 4);

– minimum creepage distances to avoid flashover across the insulating surface (see Table 5).

NOTE 3 For minimum creepage distances to maintain adequate insulation resistance, see Table F.2.

NOTE 4 This standard is not applicable for micro-environmental conditions worse than pollution degree 3 or humidity level 3.

A test method is specified for allocating unclassified insulating material to the relevant water adsorption group.

¹“Part 1” refers to IEC 60664-1.

About IHS
IHS (NYSE: IHS) is a leading global provider of critical technical information, decision-support tools and related services in a number of industries including aerospace and defense, automotive, construction, electronics, and energy. IHS serves customers ranging from large governments and multinational corporations to smaller companies and technical professionals in more than 100 countries. IHS been in business for more than 45 years and employ more than 2,300 people around the world.