1.GENERAL INTEREST - Those who are not associated with electrical construction. This category typically includes professional and lay people employed by academic and scientific institutions, experts, government agencies, insurance companies, etc.
2. CONSTRUCTION - Those who are predominatly involved with the construction of buildings and similar structures. This category typically includes contractors, architects, engineers, electricians, inspectors (private agencies), etc.
3. PRODUCER - Those who are predominately involved with the manufacture of products and systems installed by electrical contractors. This category usually includes manufacturers and trade associations.
4. GOVERNMENT - This category typically includes government agencies that contract for electrical construction work or public employees like public jurisdiction inspectors.