NEIS is a collaborative effort for the entire electrical construction industry. NEIS Partners are organizations who collaborate with NECA to produce a specific joint installation standard.
Industry Partners:
The Aluminum Association (AA)
Copper Development Association (CDA)
BICSI - Telecommunications Association 
Electrical Generating Systems Association (EGSA)
Fiber Optic Association (FOA)
Illuminating Engineering Society (IES)
International Association of Electrical Inspectors (IAEI)
National Electrical Manufacturers Association (NEMA)
National Armored Cable Manufacturers Association (NACMA)
Steel Tube Institute (STI)
National Fire Protection Association (NFPA)
NEC Plus
Thomas and Betts
Underwriters Laboratory (UL)
Schneider Electric (Square D)
Cooper Bussmann
American National Standards Institute (ANSI)
Pass and Seymour Legrand
ARCOM MasterSpec®
National Joint Apprenticeship and Training Committee (NJATC)
International Brotherhood of Electrical Workers (IBEW)
Occupational Safety and Health Administration (OSHA)
Edison Electric Institute (EEI)
Transmission & Distribution Partnership