Description of Industries and Summary of Findings INDUSTRY 3612, TRANSFORMERS, EXCEPT ELECTRONIC This industry is made up of establishments primarily engaged in manufacturing power, distribution, instrument, and specialty transformers. Establishments primarily engaged in manufacturing radio frequency or voice frequency electronic transformers, coils, or chokes are classified in industry 3677, and those manufacturing resistance welder transformers are classified in industry 3548. Products of this industry also are collected in the Current Industrial Report (CIR) MQ-36C, Fluorescent Lamp Ballasts. For information regarding the CIR, see Contacts for Data Users at the end of the Census of Manufactures section. The 1992 definition of this industry is the same as that used in the 1987 Standard Industrial Classification (SIC) system. The SIC number and title also are the same. In the 1992 Census of Manufactures, Industry 3612, Transformers, Except Electronic, had employment of 28.9 thousand. The employment figure was 10 percent below the 32.2 thousand reported in 1987. The leading States in employment in 1992 were Illinois, Mississippi, North Carolina, and Wisconsin. These same States were the leaders in 1987. The total value of shipments for establishments classified in this industry was $4.1 billion. Establishments in virtually all industries ship secondary products as well as products primary to the industry in which they are classified and have some miscellaneous receipts, such as resales and contract receipts. Industry 3613 shipped $3.9 billion of transformers, except electronic products considered primary to the industry, $75.1 million of secondary products, and had $105.6 million of miscellaneous receipts, resales, and contract work. Thus, the ratio of primary products to the total of both secondary and primary products shipped by establishments in this industry was 98 percent (specialization ratio). In 1987, the specialization ratio was 95 percent. Establishments in this industry also accounted for 97 percent of products considered primary to the industry no matter where they were actually produced (coverage ratio). In 1987, the coverage ratio was 98 percent. The products primary to industry 3612, no matter in what industry they were produced, appear in file MC92F6A and aggregate to $4.0 billion. For further explanation of specialization and coverage ratios, see file MC92F5B and the appendixes. The total cost of materials, services, and fuels and energy used by establishments classified in the transformers, except electronic, industry amounted to $2.1 billion. Data on specific materials consumed appear in file MC92F7. Single-establishment companies in this industry with less than 10 employees were excluded from the mail portion of the census. The data for these establishments (and a small number of larger establishments whose reports were not received at the time the data were tabulated) were obtained from administrative records of other agencies or developed from industry averages. These establishments accounted for 9 percent of the total value of shipments. INDUSTRY 3613, SWITCHGEAR AND SWITCHBOARD APPARATUS This industry is made up of establishments primarily engaged in manufacturing switchgear and switchboard apparatus. Important products of this industry include power switches, circuit breakers, power switching equipment, and similar switchgear for general industrial applications; switchboards and cubicles, control and metering panels, fuses and fuse mountings, and similar switchboard apparatus and supplies. Establishments primarily engaged in manufacturing relays are classified in industry 3625. Establishments manufacturing switches other than switchgear type are classified in industry 3625 if the switches are of the type used as industrial controls, in industry 3679 if the switches are of the type used in electronic devices, and in industry 3643 if the switches are of other types used in wiring circuits. Products of this industry also are collected in the Current Industrial Report (CIR) MA-36A, Switchgear, Switchboard Apparatus, Relays, and Industrial Controls. For information regarding the CIR, see Contacts for Data Users at the end of the Census of Manufactures section. The 1992 definition of this industry is the same as that used in the 1987 Standard Industrial Classification (SIC) system. The SIC number and title also are the same. In the 1992 Census of Manufactures, Industry 3613, Switchgear and Switchboard Apparatus, had employment of 39.5 thousand. The employment figure was 12 percent below the 44.8 thousand reported in 1987. The leading States in employment in 1992 were Illinois, Ohio, North Carolina, and Pennsylvania, accounting for approximately 32 percent of the industry's employment. This represents a shift from 1987 when Illinois, California, Pennsylvania, and Ohio were the leading States. The total value of shipments for establishments classified in this industry was $5.5 billion. Establishments in virtually all industries ship secondary products as well as products primary to the industry in which they are classified and have some miscellaneous receipts, such as resales and contract receipts. Industry 3613 shipped $4.9 billion of switchgear and switchboard apparatus considered primary to the industry, $317.3 million of secondary products, and had $276.5 million of miscellaneous receipts, resales, and contract work. Thus, the ratio of primary products to the total of both secondary and primary products shipped by establishments in this industry was 94 percent (specialization ratio). In 1987, the specialization ratio was 92 percent. Establishments in this industry also accounted for 93 percent of products considered primary to the industry no matter where they were actually produced (coverage ratio). In 1987, the coverage ratio also was 93 percent. The products primary to industry 3613, no matter in what industry they were produced, appear in file MC92F6A and aggregate to $5.3 billion. For further explanation of specialization and coverage ratios, see file MC92F5B and the appendixes. The total cost of materials, services, and fuels and energy used by establishments classified in the switchgear and switchboard apparatus industry amounted to $2.2 billion. Data on specific materials consumed appear in file MC92F7. Single-establishment companies in this industry with less than 10 employees were excluded from the mail portion of the census. The data for these establishments (and a small number of larger establishments whose reports were not received at the time the data were tabulated) were obtained from administrative records of other agencies or developed from industry averages. These establishments accounted for 5 percent of the total value of shipments.