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Disaster Electrical Power

Disaster Electrical Power. An early draft Ray J. Vaughan, MS Last update 3/12/2014. Disaster Electrical Power. When to use a generator vs. Temporary Sizing Care and Maintenance Power cables Power Outlets Lighting. Generator? Temporary?. Think about: Distance Power quality

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Disaster Electrical Power

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  1. Disaster Electrical Power An early draft Ray J. Vaughan, MS Last update 3/12/2014

  2. Disaster Electrical Power • When to use a generator vs. Temporary • Sizing • Care and Maintenance • Power cables • Power Outlets • Lighting

  3. Generator? Temporary? • Think about: • Distance • Power quality • Noise pollution • Duration • Safety • Theft

  4. Generator Safety • [Copy info from generator company]

  5. Fuel safety • Gas storage container • BYOG • Hand powered siphon • Never suck gas • Refuel while off • Battery Lighting while fueling • No Smoking

  6. Oil checks • Log oil changes • Have replacement oil on-hand • Mark max hours/oil change • Clean/replace air filter especially if dusty environment

  7. Temporary Power Feed • First a warning: • This is not something the average do-it-yourselfer should attempt • This is targeted for the electrician in your team • The power could come back on at any time • You have to assume that every circuit it hot and treat it with total respect

  8. Temporary Power Feed • Connecting temporary service to existing power source • Harder to set up • Nothing to refuel • Permission of owner • Check voltages first! • Usually stable, but area recovery repairs could cause outages

  9. Examples of temporary power sources • Buildings • Sewage Lift station (if 120/240 VAC) • Traffic Signals • Street lights (check voltage) • Lighted bus stops • Telephone company installations

  10. Grounding • Driving a ground rod • Borrowing existing grounds • Bonding • Connecting all grounds together

  11. Power Required • What are you going to power? • Calculate wattage • Convert to amps

  12. Power distribution? • Circuit breaker Panel? • Ground Fault Circuit Interrupter • GFCI

  13. Cable routing • Keep is safe • Trip hazards • Physical damage • Overhead • Across pavement

  14. Wire size • Wire capacity chart • Voltage drop

  15. Connectors • Standardized • 15 Amp vs. 20 Amp • Diagram • Water proof connectors • Twist Lock

  16. Lighting • Types • Incandescent • Instant on • Wattage Waste • Florescent • Good efficiency • Not for cold weather • Sodium • Odd color • Slow to light • Metal Halide • Slow to light

  17. UPS • Good for critical loads • Power while refueling • Generator brownouts

  18. Dangers of Back-feeding • Step down transformer also steps up • Fatal voltage can go for miles • Kills power company techs

  19. Command Post power • Wish list: • Breaker panel on a hand truck • Emergency light • GFCIs • Heavy Duty power cables • Over head lighting • Charging stations • Radios • Tools

  20. Summary • Safety First • Use an electrician if at all possible • Safety Officer should be briefed before starting or energizing • Do it right the first time • Long term installation

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