NCSU
Environmental Health and Safety

Electrical Equipment Design

 
Introduction
1.1 Abstract
1.2 Objective
1.3 Application
1.4 Effective Date
1.5 Origination Area and Responsibility
1.6 Authorization
1.7 Compliance
1.8 Deviation
1.9 Requirements
 
General Requirements
2.1 Location Requirement
2.2 New Equipment Requirements
2.3 Diagrams
2.4 Labels
2.5 Nominal Voltages
2.6 Equipment Power Guidelines
2.7 Mechanical Execution of Work
2.8 Existing Equipment Requirements
2.9 Additional Requirements
 
Components (Devices)
3.1 General Requirements
3.2 Terminal Lugs
3.3 Control Switches 0
3.4 Indicating Lights and LEDs, Lighted Switches
3.5 Electrolytic Capacitors
3.6 Transformers
3.7 Plugs, Connectors, and Receptacles
3.8 Motors
3.9 Magnetic Devices
3.10 Supply Circuit Disconnecting Means
3.11 Circuit Protection
3.12 Electrical Heating Units
3.13 Power Supplies
 
Conductors
4.1 General Requirements
4.2 Single Conductors
4.3 Flexible Cords and Cables
4.4 Multiconductor (Jacketed) Cables
4.5 Special Conductors
4.6 Conductor Color Code
 
Grounding
5.1 Resistance
5.2 Terminations
5.3 Conductors
5.4 Splicing
5.5 Conductive Metal
5.6 Receptacles
5.7 Interconnecting Cables
5.8 Isolation
5.9 Exceptions
 
Electrical Enclosures and Wiring Methods
6.1 General Requirements
6.2 Electrical Enclosures
6.3 Electrical Enclosure Wiring
6.4 Equipment Wiring
6.5 Mechanical Protection
6.6 Conductor Length
6.7 Splicing
6.8 Strain Relief
 
Access Areas and Controls
7.1 Operator Access Areas
7.2 Service Access Areas
7.3 Safety Interlocks
7.4 Hand Controls
7.5 Machine Controls
7.6 Fail-Safe Controls and Switching Devices
7.7 Control Location
 
Control Circuits
8.1 General Requirements
8.2 Small Equipment
8.3 Large Equipment and Systems
8.4 System Circuit Requirements
 
Temperature Limits
9.1 Shielding
9.2 Conductors
9.3 Components
9.4 Definitions
 
Mechanical Safety
10.1 Protection
10.2 Wire Mesh Shields
10.3 Sliding Parts
10.4 Weights
10.5 Covers
10.6 Edge and Corner Breaks
10.7 Stability
 
Appendix A.
Definitions
Appendix B.
Typical Device Designations
Appendix C.
Typical Graphic Symbols
Appendix D.
Typical Circuits
Appendix E.
Enclosures and Raceways