To avoid the risk of accidental shock, live electrical components operating at 50 volts or more must be guarded with covers or other permanent barriers to prevent accidental contact by workers and their tools. Equipment can also be locked behind an enclosure, in a room, or at an elevated height.
When guarding live electrical parts guarding may be provided by location room balcony or platform or by elevation eight feet or more above the working surface?
Guarding of live parts. By elevation of 2.44 m (8.0 ft) or more above the floor or other working surface. In locations where electric equipment is likely to be exposed to physical damage, enclosures or guards shall be so arranged and of such strength as to prevent such damage.
ANSWER: According to OSHA’s 29 CFR 1910.333(a)(1), working on live parts that operate above 50 volts is allowable ONLY when the employer “can demonstrate that de-energizing introduces additional or increased hazards or is infeasible due to equipment design or operational limitations.”
Does OSHA require electrical panels to be closed?
The Occupational Health and Safety Administration (OSHA) and the National Fire Protection Association (NFPA) have outlined the amount of clearance necessary around an electric panel. They have also determined that all live components must be enclosed to protect workers.
What is an example of electrical guarding?
To avoid the risk of accidental shock, live electrical components operating at 50 volts or more must be guarded with covers or other permanent barriers to prevent accidental contact by workers and their tools. Equipment can also be locked behind an enclosure, in a room, or at an elevated height.
What is considered safe voltage?
The safe voltage is the voltage that does not cause a physical shock, generally less than 36 volts.
What is the OSHA standard for electrical panels?
The OSHA standard (29 CFR1910. 305 (d)) requires a dead front on electrical panel boards. equipment serving 600 volts or less. more to be guarded to prevent accidental contact by approved enclosures.
What are the two best means of avoiding injury from electrical devices?
The two best means of avoiding injury from electrical devices are insulation and grounding. … Insulators help stop or reduce the flow of electrical current, which in turn helps prevent shocks, short circuits and fires.
What procedures should be followed if a circuit Cannot be de energized?
The U.S. Occupational Safety and Health Administration (OSHA) requires a procedure known as lockout/tagout. This method is used to ensure that once a circuit has been de-energized, it cannot be reenergized without the knowledge and permission of the person who established the lockout/tagout.
What are the two main electrical hazards a qualified electrical worker looks out for?
OSHA defines qualified workers as those specially trained to work on live electrical equipment. Qualified workers must protect themselves against all electrical hazards including shock, arc flash, burns and explosions. Training is key.
What is considered electrical hot work?
Hot work is the practice of working on energized electrical circuits (voltage limits differ regionally) – and it is usually done, in spite of the risks, to reduce the possibility of a downtime incident during maintenance. Uptime Institute advises against hot work in almost all instances.