Page 2 - Cables According to International Approvals

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NFPA 79 Edition 2007 - [i.]

NFP~
Challenges and solutions MEMBER
10-11

The first edition of the Electrical Code (NEC), also referred to as NFPA 70, was published in 1897. The NEC is the

only code for electrical installations that enjoys national recognition in the USA. It addresses the causes of
electricity-induced fire. The code is updated every three years, that means a new version is expected in 2010. In
Article 670 "Industrial Machinery" the NEC refers to the NFPA 79 (Electrical Standard for Industrial Machinery).
This standard specifies the safety requirements for electrical equipment of industrial machinery or industrial
manufacturing systems. Manufacturers and operators of plant and machinery have to comply with this and other
standards in order to fulfil their product liability and satisfy insurance requirements.

Machines commissioned in the USA are always subject to approval, which can be obtained in two different ways.
One is through a testing institute accredited in the USA, alternatively the machine concerned is subjected to an
acceptance procedure in Germany, for example. The final decision on whether a machine is to be commissioned is
always taken by a local inspector, who does not necessarily have to be an expert in electrical systems. If the
inspector is in any doubt as to whether the machine complies with the relevant US standards, he may order a
temporary stoppage.

Although the current version of NFPA 79 2007 places restrictions on the use of AWM cables, they continue to be
permitted in machines. Section 12.2.7.3 states: "When part of a listed assembly suitable for the intended
application, Type AWM shall be permissible." This means that AWM cables may be used as part of a listed system
provided they are suitable for the intended application. Modifications to the NPFA 79 standard will not become
effective until they have been adopted as applicable provisions by the federal states concerned. This process
usually takes years and was concluded for Version 2007 in only a few federal states.

Summary
• Plant and machinery with certification (e.g. from UL) can continue to be repaired, modified or upgraded in
accordance with existing rules.
• Newly certified plant and machinery can continue to be constructed in accordance with existing rules. The certi-
fication is recognised.

• In certain sectors, new plant and machinery without certification may need to satisfy tougher requirements for
certain cables (e.g. UL Listing). In this case, consultation is required with the certifying body concerned.

If you have any further questions, please contact your local HELUKABEL~ representative or our cable experts,

The following pages present a broad range of cables that already meet the requirements of the 2007 Edition

of NFPA 79.

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