Fundamental rule of protection: Difference between revisions
m (cleaned up source: table format, etc ...) |
m (1 revision) |
(No difference)
|
Revision as of 20:13, 10 December 2013
The fundamental rule of protection against electric shock is provided by the document IEC 61140 which covers both electrical installations and electrical equipment.
Hazardous-live-parts shall not be accessible and accessible conductive parts shall not be hazardous.
This requirement needs to apply under:
- Normal conditions, and
- Under a single fault condition
Various measures are adopted to protect against this hazard, and include:
- Automatic disconnection of the power supply to the connected electrical equipment
- Special arrangements such as:
- The use of class II insulation materials, or an equivalent level of insulation
- Non-conducting location, out of arm’s reach or interposition of barriers
- Equipotential bonding
- Electrical separation by means of isolating transformers
ru:Основные правила защиты от поражения электрическим током zh:防护基本原则