Left Border Content - RF Cafe
Anatech Electronics (RF Filters) - RF Cafe
RF Electronics Symbols, Stencils for Office, Visio by RF Cafe
 

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

AirplanesAndRockets.com

Header Region - RF Cafe
Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes App Notes Calculators Education Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Homepage Thank you for visiting RF Cafe!
Sub-Header - RF Cafe Exodus Advanced Communications Best in Class RF Amplifier SSPAs

Hazardous Voltage Levels




Hazardous Voltage Levels - RF CafeHigh voltage. Low voltage. We hear the term used often, but it would be good to have a definitive listing of what voltage levels qualify for which levels. The table below lists some typical names and the corresponding voltage levels. The video clip at the left appeared as a Cool Pic on RF Cafe a year or so ago, and the one on the right was recently found. Both are awesome.

For human electrocution levels, please click here.

Name Range Description
Safety Extra-Low1 ≤42.2 Vac pk, ≤60 Vdc Considered "safe" for touching (although never recommended). Protected to "guarantee" voltage will never rise above these levels, even under a fault condition. Double insulated.
Extra-Low1 ≤42.2 Vac pk, ≤60 Vdc Non-touchable, but considered safe due to insulation from hazardous voltages.
Low2 ≤1 kVac Considered hazardous. These level are found in common residential and commercial equipment installations.
Medium3 >1 kVac to 100 kVac Very hazardous. Residential and small commercial transformers, both on poles and on the ground.
High3 ≥100 kVac to ≤230 kVac Very hazardous. Found in transmission grid systems including substations.
Extra-High4 >230 kVac to ≤800 kVac Extremely hazardous, even at a distance. Transmission systems between substations and power generation.
Ultra-High4 >800 kVac to 2 MVac Extremely hazardous, even at a great distance. Transmission systems between substations and power generation.

 

References:
1: IEC 60950-1
2: NEC-NFPA 70 low voltage = 600 V, ANSI/IEEE low voltage = 1 kVac, EU's Low Voltage Directive = 50 V to 1 kVac & 75 to 1.5 kVdc
3: ANSI C84.1 & IEEE 100
4: IEEE 1312 & IEEE 100
Footer - RF Cafe high frequency PCB of PCBONLINE
Right Border Content - RF Cafe
PCB Directory (Design)
LOTUS Communications Systems Modular RF Component Building Blocks - RF Cafe
 

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free