Hazardous Course 2. Rather than being focused on shooting at aliens, Hazardous Course 2 revolved around… well, hazardous courses. The mod featured a range of challenging platforming levels, inside which there was an abundance of secrets hidden away, like …
Mar 03, 2012 · “The Hazardous-Course 2 is a spoof of the original “Hazard-Course” from Half-Life, which resembles the first player training levels. In contrary to this, the Hazardous-Course, as it’s name let’s suggest, is much more dangerous.
Mar 15, 2012 · The Hazardous-Course 2 is a spoof of the original "Hazard-Course" from Half-Life, which resembles the first player training levels. In contrary to this, the Hazardous-Course, as it's name let's suggest, is much more dangerous. Although it's a mod for a first person shooter, the player can only wield a weapon at the designated target range.
Nov 29, 2015 · Hazardous course 2. An extended version of original hazard course. This is an exteded version of original hazard course in Half-Life. This mod is for advanced Half-Life players (without cheating) and will cause a lot of frustration failing so many times... Even being so hard this mod, you still can enjoy the great atmosphere and fun stuff.
The concept of intrinsic safety in wiring recognizes that a sufficient concentration of ignitable, flammable or combustible materials will be present, with air or another oxidizer, to represent a fire or explosion hazard. These mixtures could easily be ignited by a match or other open flame, or by a high-energy spark. The wiring used in areas where these mixtures are present can be implemented in a manner which absolutely precludes any possibility of igniting these mixtures. That is the essence of intrinsic safety. Intrinsically safe wiring will never have enough energy available within the defined hazardous area to ignite any explosive or combustible mixture of gasses, dusts, or metals.
The principle behind explosion-proof transducers and wiring is that if the ignition of flammable material that occurs within the transducer or wiring it will be contained. The hot gasses and flames will not be allowed to escape into the hazardous area and further propagate the fire or explosion. All circuit wiring is run in conduit and junction boxes approved for explosion-proof installation.
When installations are not explosion proof or intrinsically safe, pressurization is often used to maintain the classified area safety. Wiring and enclosures are protected using a positive air pressure maintained within the enclosure, junction boxes and conduit.
The fire triangle is a tool to illustrate the three elements which must be present to have a fire or explosion: fuel, oxidizer, and energy. Fuel and oxidizer must be present in a concentration appropriate to form a combustible mixture. The ignition source must supply enough energy to initiate combustion. If any one of the elements of the triangle is not present in sufficient amount, then combustion cannot occur.
The concepts embodied in the fire triangle have been codified by various organizations. In the United States, one of the earliest organizations established was the predecessor of FM Global. In 1835 Zachariah Allen, a Rhode Island native and prominent textile mill owner, set out to reduce the insurance premium on his Rhode Island mill by making property improvements that would minimize the chance of fire loss.1 Although widely accepted today, the concept of loss control was virtually unheard of at the time; but to Allen, a proactive approach to preventing losses before they occurred made good economic sense. As Allen predicted, proper fire prevention methods, monitored by regular fire inspections for mill policyholders, resulted in fewer losses.
There are four basic principles to provide protection for hazardous area electrical circuit wiring: (1) prevent arcs, sparks and hot surfaces; (2) prevent the combustible material from entering the space; (3) contain any explosion of combustible material within the electric enclosure; or (4) limit the energy available for sparks and hot surfaces . Methods of protection and their permitted use areas are summarized in table 2.2.1.
The NEC® Article 504 controls the wiring of intrinsically safe circuits. It generally requires that intrinsically safe circuits be physically separated from nonintrinsically safe circuits. Conductors and cables of intrinsically safe circuits not in raceways or cable trays shall be separated at least 50 mm (2 inches) and secured from conductors and cables of any non-intrinsically safe circuits. Conductors of intrinsically safe circuits can only be placed in the same raceway or cable tray with non-intrinsically safe circuits when the intrinsically safe circuits are separated by a distance of 50 mm (2 inches) or by a grounded metal partition or approved insulating partition. The 50 mm separation of circuits also applies to the wiring within enclosures.