Script to accompany PowerPoint on Application Considerations Industry trainers are encouraged to use these materials in their sessions. Slide 1 Suggestion on How to Use Download both the PowerPoint file (.ppt) and script file (.pdf). Print the script file (.pdf) and read the script as you view the PowerPoint (.ppt) presentation in the “Slide Show” view. In this way you see the slides in large format and have animation (if there is any). Must have PowerPoint and Adobe reader application software on your system. Slide 2 Slide 3 Electrical Installation – Considerations based upon role: Owner – Fund and own building. They expect a quality design, installation, and operating life at a reasonable price. Typically not well versed in the nuances of electrical equipment and protection. After installation, responsible for system, operation, and maintenance and work practices in facility. Architect – Design building. Not very well versed in nuances of electrical system tradeoffs. Allocation of space sometimes issue. Electrical engineer – Specify electrical distribution system and equipment. Responsible for quality design that meets owners and architects needs and cost. Contractor – Installs and prepares equipment for operation per plans and specifications. Design– build contractors: work with owner on design through construction of project (eliminate electrical engineer). Electricians – Complete the installation work in quality manner. Safety is of utmost importance. After installation, responsible for keeping the system up and running Electrical Inspector – Insures that system meets applicable Codes – N.E.C. Workers / maintenance workers – After installation, workers typically have responsibility for a factory process. General maintenance workers with responsibility for electrical systems may create safety concerns. Insurance companies work with their clients to minimize the exposure to risk. Slide 4 Some important considerations and goals for electrical systems: Good design practices – A must but in the eye of the be holder. Electrical system should meet all these other criteria plus more. Codes and Standards – Such as NEC. However, simply complying with NEC will not insure a safe or dependable system (minimum requirements). Protection – NEC 90.1 Purpose (A) Practical Safeguarding. The purpose of this Code is the practical safeguarding of persons and property from hazards arising from the use of electricity. See Handout for overcurrent protection considerations. Safety – Considerations when electricians or maintenance personnel work on electrical equipment to insure their safety. Work Practices & rules – For instance arcing faults can generate tremendous flash and blast energies that can be a threat to both workers and equipment/buildings. Means must be taken to reduce the risk and hazard. OSHA rules and regulations must also be followed. Training and mandating that workers follow safe work practices and system operation is vital to safety. Reliability – Overcurrent protective devices must be reliable to properly protect the electrical distribution system and equipment. How good is an overcurrent protective device if it does not properly operate on an overcurrent, if it is out of calibration, defective, or if the incorrect device is installed?
