UL 60079-15

Electrical Apparatus for Explosive Gas Atmospheres – Part 15: Construction, Test and Marking of Type of Protection “n” Electrical Apparatus

UL 60079-15

1 Scope

This part of IEC 60079 specifies requirements for the construction, testing and marking for Group II electrical apparatus with type of protection, “n” intended for use in explosive gas atmospheres.

1DV.1 Modification of Clause 1 first paragraph to replace as follows:

This standard specifies requirements for the construction, testing and marking for Group II electrical apparatus with type of protection, “n” intended for use in Class I, Zone 2 hazardous (classified) locations as defined by the National Electrical Code, ANSI/NFPA 70.

This part is applicable to non-sparking electrical apparatus and also to electrical apparatus with parts or circuits producing arcs or sparks or having hot surfaces which, if not protected in one of the ways specified in this standard, could be capable of igniting a surrounding explosive gas atmosphere. This standard describes several different methods by which this can be achieved which may be combined with other methods described in IEC 60079-0. 1DV.2 Modification of Clause 1 second paragraph to replace as follows:

Replace “part” with “standard”.

This part supplements the general requirements in IEC 60079-0. The relationship of IEC 60079-0 to this part is as indicated in Table 1.

1DV.3 Modification of Clause 1 third paragraph to replace as follows:

Replace “part” with “standard”. Table 1 – Relationship of this part to IEC 60079-0

1DV.4 Modifications of Table 1 to replace as follows:

Replace “part” with “standard” in Table title, add “A” before “Ex nL” in last column, and delete “item b)”.

A non-incendive component is limited in use to the particular circuit for which it has been shown to be non-ignition capable and, therefore, cannot be separately assessed as complying with this standard.Compliance with this standard does not imply any removal of, or lowering of the requirements of any other standard with which the electrical apparatus complies.This part supplements, and may enhance, the requirements for apparatus for normal industrial applications. Where compliance with other IEC standards is indicated, such as IEC 60034 for motors and IEC 60598-2 for luminaires, proving compliance to those standards is normally the responsibility of the manufacturer.

1DV.4 Addition of Note 4 as follows:

Note 4 The National Electrical Code?, (ANSI/NFPA 70?) through the 2008 edition only recognizes types of protection “nA”, “nC” and “nR” and not “nL”. See note in 35.1.

1DV.5 Addition of 1DV.5.1 and 1DV.5.2

1DV.5.1 The U.S. version of IEC 60079-15 does not include requirements for Group I electrical apparatus. Requirements for Group I electrical apparatus included in this document are to be considered omitted in all instances where they appear.

1DV.5.2 Where references are made to IEC 60079 standards, the referenced requirements found in these standards shall apply as modified by any applicable U.S. National Differences.