....General Electric Technical Services Company

....Consolidated Edison Company of New York

...Consumers Power Company

...Duke Power Company


...El Paso Electric



..Florida Power & Light



...Houston Power & Light


....Indianapolis Power & Light



...Minnesota Power Company



.New York State Electric and Gas


...Northern States Power Company


..Potomac Electric Power Company


..Public Service Indiana (PSI Energy)

..San Diego Gas & Electric

..Texas Municipal Power Authority

Names and phone numbers available upon request