- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
Anyone with access to the current UL WhiteBook will find two Product Categories labeled AALZ and AAIZ. They are the general requirements for Electrical Equipment for Use in Ordinary Locations and Equipment for Use in and Relating to Class I, II and III, Division 1 and 2 Hazardous Locations respectively. As you read the descriptions of other listed Product Categories for electrical equipment you will find that they will refer to at either AALZ or AAIZ. (AANZ is the “Zone” equivalent of AAIZ.)
I’m not exactly sure when the change occured, but at least in the 2004 and earlier editions the other electrical Product Categories were actually subcategories AALZ or AAIZ.
Both AALZ and AAIZ include the following text:
I’m not exactly sure when the change occured, but at least in the 2004 and earlier editions the other electrical Product Categories were actually subcategories AALZ or AAIZ.
Both AALZ and AAIZ include the following text:
You may interpret it as you wish.FIELD MODIFICATIONS
The UL Mark applies to the product as it is originally manufactured when shipped from the factory. Authorized use of the UL Mark is the manufacturer’s declaration that the product was originally manufactured in accordance with the applicable requirements. UL does not know what the effect of a modification may have on the safety of the product or the continued validity of the UL certification mark unless the field modifications have been specifically investigated by UL. Unless UL investigates a modified product, UL cannot indicate that the product continues to meet UL’s safety requirements.
The only exception for a field modification authorized by UL is when the product has specific replacement markings. For example, a switchboard may have specific grounding kits added in the field. The switchboard is marked with a list of specific kit numbers that have been investigated for use in that particular switchboard. Only grounding kits that are included on the product have been investigated for use in that product.