What are they?
Power failures, also known as blackouts, are the easiest power problem to diagnose. If the lights go out, chance are there has been a power failure. Any temporary, or not so temporary, interruption in the flow of electricity will result in a power failure which can cause hardware damage and data loss.
Where do they come from?
Violent weather is the first thing that comes to mind, but there are any number of other causes. Overburdened power grids, car accidents that bring down power lines, lightning strikes, and human error are all likely sources.
What can they do?
Power failures are more than simply inconvenient and annoying. They can cause computer users to lose hours of work when systems shut down without warning. Power failures can even damage hard drives resulting in loss of all data on a system. Consider the fact that a single power outage on a high traffic network can stall hundreds of users, and the seriousness of power failures becomes evident. Even worse, when the power returns, it often brings after-blackout spikes and surges to cause even more damage.
What can be done?
Computer users should consider a UPS system to protect their systems. These systems monitor line levels and switch over to battery power when utility power fails.
- Lamp Guide: General Information
- Lamp Guide: Fluorescent
- Lamp Guide: HID
- Lamp Guide: Incandescent
- Line Noise
- Power Surges and Spikes
- Heat Dissipation in Electrical Enclosures
- Hazardous Location Basics
- Basic Proximity Sensor Operations
- Occupancy Sensor Design Guide
- Occupancy Sensor Application Guide
- Color Application for HID Lamps
- Cutler-Hammer Heater Coil
- General Electric Heater Coil
- Allowable Ampacities Insulated Conductors
- Conduit Fill Table
- NEMA Straight Blade Configs
- NEMA Locking Blade Configs
- Common Conversion Factors
- Derate 3 Conductors in a Raceway
- Direct Current Motor Full Load Current
- Approximate Full Load Amperes
- Full Load Current: Three Phase AC Motors
- Full-Load Current: Single Phase AC Motors
- Specific Resistance
- Temperature Conversion Table
- UL Fuse Classification Chart
- Buck Boost Transformer Full Load Amps
- Ohm's Law
- Electrical Formulas
- Full Load Formula
- Attenuation for Coaxial and UTP Cables
- Backbone Runs: UTP Cable
- Basic/Channel Link Attenuation
- Basic/Channel Link Next Loss
- Cable Administration
- Category Cables
- Circuit Protection
- Common Ethernet Systems
- Common Types of Cabling
- Computer Circuits
- Copper Wire Limitations
- Digital Patch Cable (DPC) Coding
- 10Base-T Crossover Patch Cord
- 10Base-T Straight Thru Patch Cord
- General Cable Installation Rules
- UTP Cable Attenuation
- Installing Category Data Cables
- Parameters of EIA/TIA 568
- Separation from Sources of Interference
- Structured Cabling (568) Systems
- Standard Networking Configurations
- Telecommunication Outlet Specifications
- UTP Connecting Hardware