Electrical safety is important to prevent fires and injuries. Common causes of electrical fires include defective devices, overloading circuits, and sparks igniting flammables. Proper grounding helps reduce electric shock risks. Equipment should only be used as intended and electrical work left to qualified professionals to avoid accidents like one that fatally electrocuted a researcher due to multiple safety violations with an improperly adapted light fixture.
Preparation for hazards and respect for this powerful energy source are a must. Even seasoned electricians need reminders on the basic rules of electrical safety. Here are a few to keep in mind.
Practical Earthing, Bonding, Lightning and Surge ProtectionLiving Online
Few topics generate as much controversy and argument as that of earthing and the associated topics of surge protection, shielding and lightning of electrical and electronic systems. Poor earthing practice can be the cause of continual and intermittent difficult-to-diagnose problems in a facility. This workshop looks at these issues from a fresh yet practical perspective and enables you to reduce expensive down time on your plant and equipment to a minimum by correct application of these principles.
This workshop is designed to demystify the subject of earthing and presents the subject in a clear, straightforward manner. Installation, testing and inspection procedures for industrial and commercial power systems will be examined in detail. Essentially this workshop is broken down into earthing, shielding and surge protection for both power and electronics systems. Earthing and surge protection for telecommunications and IT systems are examined in detail. Finally, the impact of lightning is examined and simple techniques for minimising its impact described.
Lightning, Surge Protection and Earthing of Electrical and Electronic Systems...Living Online
Few topics generate as much controversy and argument as that of lightning and surge protection of electrical and electronic systems. Poor practices in earthing, and incorrect application and selection of lightning and surge protection devices can be the cause of continual and intermittent problems in a facility, often resulting in lost production and equipment failure.
This workshop looks at these issues from a fresh yet practical perspective and enables you to reduce expensive down time on your plant and equipment by the correct application of these principles. Essentially the workshop is broken down into the methods used to prevent lightning entering a facility such as dissipation arrays and those that divert surge energy away from sensitive equipment.
Dissipation systems are discussed with associated earthing systems. The unique properties of various surge protection devices are reviewed, enabling you to select the correct device suited to the application required. Earthing and surge protection for telecommunications and IT systems are examined in detail as well as the impact of lightning and simple techniques for minimising its impact.
MORE INFORMATION - http://www.idc-online.com/content/lightning-surge-protection-earthing-electrical-electronic-systems-industrial-networks-13?id=6987
Preparation for hazards and respect for this powerful energy source are a must. Even seasoned electricians need reminders on the basic rules of electrical safety. Here are a few to keep in mind.
Practical Earthing, Bonding, Lightning and Surge ProtectionLiving Online
Few topics generate as much controversy and argument as that of earthing and the associated topics of surge protection, shielding and lightning of electrical and electronic systems. Poor earthing practice can be the cause of continual and intermittent difficult-to-diagnose problems in a facility. This workshop looks at these issues from a fresh yet practical perspective and enables you to reduce expensive down time on your plant and equipment to a minimum by correct application of these principles.
This workshop is designed to demystify the subject of earthing and presents the subject in a clear, straightforward manner. Installation, testing and inspection procedures for industrial and commercial power systems will be examined in detail. Essentially this workshop is broken down into earthing, shielding and surge protection for both power and electronics systems. Earthing and surge protection for telecommunications and IT systems are examined in detail. Finally, the impact of lightning is examined and simple techniques for minimising its impact described.
Lightning, Surge Protection and Earthing of Electrical and Electronic Systems...Living Online
Few topics generate as much controversy and argument as that of lightning and surge protection of electrical and electronic systems. Poor practices in earthing, and incorrect application and selection of lightning and surge protection devices can be the cause of continual and intermittent problems in a facility, often resulting in lost production and equipment failure.
This workshop looks at these issues from a fresh yet practical perspective and enables you to reduce expensive down time on your plant and equipment by the correct application of these principles. Essentially the workshop is broken down into the methods used to prevent lightning entering a facility such as dissipation arrays and those that divert surge energy away from sensitive equipment.
Dissipation systems are discussed with associated earthing systems. The unique properties of various surge protection devices are reviewed, enabling you to select the correct device suited to the application required. Earthing and surge protection for telecommunications and IT systems are examined in detail as well as the impact of lightning and simple techniques for minimising its impact.
MORE INFORMATION - http://www.idc-online.com/content/lightning-surge-protection-earthing-electrical-electronic-systems-industrial-networks-13?id=6987
Insulation Job is done every industry But no one know about Actual Insulation job hazards and precautions . This slides explain the insulation job Hazards & precautions , type of insulation etc ..
Tank Grounding for safe operating conditions to ensure proper dissipation of transient electrical currents, static electricity, and lightning dispersion.
Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-writing modes. As stated in Writing from A to Z, edited by Kirk Polking, description is more than the amassing of details; it is bringing something to life by carefully choosing and arranging words and phrases to produce the desired effect (Polking 1990, p. 106). The most appropriate and effective techniques for presenting description are a matter of ongoing discussion among writers and writing coaches.Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-writing modes. As stated in Writing from A to Z, edited by Kirk Polking, description is more than the amassing of details; it is bringing something to life by carefully choosing and arranging words and phrases to produce the desired effect (Polking 1990, p. 106). The most appropriate and effective techniques for presenting description are a matter of ongoing discussion among writers and writing coaches.Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-w
Power tools are widely used on construction sites. Flexible extension cords are often necessary to provide electricity to the tool. Due to the very reasons they are used, necessary to provide electricity to the tool. Due to the very reasons they are used, they are more susceptible to damage than fixed wiring. Approximately many of these injuries are related to problems with electrical outlets, power cords and extension cords.
Designing and testing of metal oxide surge arrester for EHV lineRohit Khare
Surge arresters constitute an indispensable aid to insulation coordination in electrical power systems. There the voltages which may appear in an electrical power system are given in per-unit of the peak value of the highest continuous line-to-earth voltage, depending on the duration of their appearance. The voltage or overvoltage which can be reached without the use of arresters is a value of several p.u. If instead, one considers the curve of the withstand voltage of equipment insulation (here equipment means electrical devices such as power transformers) one notices that starting in the range of switching overvoltages, and especially for lightning over voltages, the equipment insulation cannot withstand the occurring dielectric stresses. At this point, the arresters intervene. When in operation, it is certain that the voltage that occurs at the terminal of the device - while maintaining an adequate safety margin - will stay below the withstand voltage. Arresters’ effect, therefore, involves lightning and switching over voltages.
The time axis is roughly divided into the range of lightning overvoltage (microseconds), switching overvoltages (milliseconds), temporary overvoltages (seconds) – which are commonly cited by the abbreviation "TOV" – and finally the temporally unlimited highest continuous system operation voltage.
Insulation Job is done every industry But no one know about Actual Insulation job hazards and precautions . This slides explain the insulation job Hazards & precautions , type of insulation etc ..
Tank Grounding for safe operating conditions to ensure proper dissipation of transient electrical currents, static electricity, and lightning dispersion.
Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-writing modes. As stated in Writing from A to Z, edited by Kirk Polking, description is more than the amassing of details; it is bringing something to life by carefully choosing and arranging words and phrases to produce the desired effect (Polking 1990, p. 106). The most appropriate and effective techniques for presenting description are a matter of ongoing discussion among writers and writing coaches.Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-writing modes. As stated in Writing from A to Z, edited by Kirk Polking, description is more than the amassing of details; it is bringing something to life by carefully choosing and arranging words and phrases to produce the desired effect (Polking 1990, p. 106). The most appropriate and effective techniques for presenting description are a matter of ongoing discussion among writers and writing coaches.Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-w
Power tools are widely used on construction sites. Flexible extension cords are often necessary to provide electricity to the tool. Due to the very reasons they are used, necessary to provide electricity to the tool. Due to the very reasons they are used, they are more susceptible to damage than fixed wiring. Approximately many of these injuries are related to problems with electrical outlets, power cords and extension cords.
Designing and testing of metal oxide surge arrester for EHV lineRohit Khare
Surge arresters constitute an indispensable aid to insulation coordination in electrical power systems. There the voltages which may appear in an electrical power system are given in per-unit of the peak value of the highest continuous line-to-earth voltage, depending on the duration of their appearance. The voltage or overvoltage which can be reached without the use of arresters is a value of several p.u. If instead, one considers the curve of the withstand voltage of equipment insulation (here equipment means electrical devices such as power transformers) one notices that starting in the range of switching overvoltages, and especially for lightning over voltages, the equipment insulation cannot withstand the occurring dielectric stresses. At this point, the arresters intervene. When in operation, it is certain that the voltage that occurs at the terminal of the device - while maintaining an adequate safety margin - will stay below the withstand voltage. Arresters’ effect, therefore, involves lightning and switching over voltages.
The time axis is roughly divided into the range of lightning overvoltage (microseconds), switching overvoltages (milliseconds), temporary overvoltages (seconds) – which are commonly cited by the abbreviation "TOV" – and finally the temporally unlimited highest continuous system operation voltage.
Electrical Safety. Electrical hazards can cause burns, shocks and electrocution (death). Assume that all overhead wires are energized at lethal voltages. Never assume that a wire is safe to touch even if it is down or appears to be insulated.
8. Damaged and Unapproved Devices Cord plug with ground prong missing Damaged TVSS rated power strip Adapter enables circuit overload Not Permitted:
9. Damaged and Unapproved Devices Not Permitted: Lamp extension cord, also damaged Power taps Adapter to change 3-prong plug to 2-prong eliminating ground
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Editor's Notes
The basic idea of an over current (think of overcurrent as current out of control) protection device is to create a weak link in the system that will stop the flow of electricity before the overcurrent can cause any other damage. Overcurrent protection devices should always be placed on the hot leg and sized appropriately. Improper sizing can cause wiring or equipment to be damaged before the protection device has a chance to do its job. These devices may not and are not intended to protect people; they protect equipment.
Power extension cords and power strips (also known as power taps) are a means to deliver electricity from a power source to a tool or device located where the power source is not. Sometimes the use of such power delivery devices presents overloading factors. The possible consequences of using a power strip should be considered beforehand. Some concerns include Damaged or faulty devices posing fire and shock hazards Tripping hazards Rules to follow: Extension cords are authorized only for temporary use (to do the job at hand, not to remain as a power source for an extended amount of time (days, weeks). Extension cords may not be run through doorways, windows, ceilings, etc. whereby they may be damaged and/or pose tripping hazard Extension cords may not be smaller in diameter then the tool power cords to which they are connected Power strips are authorized only for temporary use, if they are to be used as extension cords Power strips designated as TVSS may be used for longer periods of time for electronic devices only (computers and components, adding machines, clocks, radios) but should not be overloaded or doubled-up Power strips and extension cords may not be used for appliances (refrigerators, microwaves, coffee pots, portable heaters) All devices and cords must be UL or comparably approved and in good working condition without any signs of damage
If you encounter an EGI extension cord that is missing or has a damaged ground prong. Take out of service immediately by cutting off the male end and delivering to the EGI Supervisor
As a rule.., these items are not allowed on any EGI project.
For our purposes today, the client is Middlesex Hospital. But this also applies to all other jobsites.
EEW pertains to qualified electrical workers. They must attend additional and more extensive training than provided in this section. This does not apply to anyone attending the New Employee Orientation Training.
Do not take shortcuts and risk the safety of yourself or others. Know and follow safe work practices and procedures, and if you are unsure…ASK!! Use only appropriate tools and equipment for the work to be done. Inspect all tools and equipment prior to and during work activity. The label UL Approved only means the device left the factory meeting certain criteria. During the time that you may use the device, it may become damaged, therefore exposing yourself and others to hazards. Remember: stray electric current caused by damage to a device can shock, seriously injure or kill. Report any and all unsafe conditions: Receiving an electric shock Sparks Overheating or smoking equipment; Corroded/damaged outlets, switches and junction boxes; Damaged extension cords and equipment power cords that are in use; Exposed wiring, broken plugs, outlets, missing box cover or faceplates; Outlets in damp areas not equipped with GFCI. Stay productive and safe - follow the rules .
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