William G Hyman Electric is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Electrical Inspection Service
• Electrical Power Systems Testing & Maintenance
• Engineers Electrical

North American Industry Classification System (NAICS) Categories:

• Electrical Contractors > Electric Power Systems Contractors > Electrical Power Systems Testing & Maintenance
• Electrical Contractors > Safety & Security Services > Electrical Inspection Service
• Engineering Services > Engineers Electrical, Electronic & Communications > Engineers Electrical

Standard Industry Classification (SIC) Categories:

• Electrical Work > Electric Power Systems Contractors > Electrical Power Systems Testing & Maintenance
• Electrical Work > Safety & Security Services > Electrical Inspection Service
• Engineering Services > Engineers Electrical, Electronic & Communications > Engineers Electrical