CGA stands for the Compressed Gas Association. A CGA fitting is standardized system for the attachment of a compressed gas cylinder to the required regulator or transfer line. Examples of CGA fittings would be CGA-580 for Non-flamable, Non-oxidizing gasses such as Nitrogen, Argon, or Helium. CGA-590 is used for compressed air and CGA-326 is used for Nitrous Oxide. There are approximately a dozen commonly used CGA-fittings, with others used for special purposes. These welding fittings are typically used for welding applications, but can extend to other application such as medical and other gas uses. The fitting standards are designed to make the gas connections leak tight and also prevent different fittings from being mixed up. For example, flamable gas fittings have a left hand thread fittings. Oxygen and inert gases have right hand thread fittings. Since a left hand thread fittings cannot be threaded onto a right hand fitting, it is impossible to connect the fuel gas to the oxygen and vise versa. It is easy to determine whether the fitting is a left hand or right hand thread. The left hand fittings all have a small cut or slash on the nut of the fitting that denotes the left hand thread.
when 30mA or so passes thru something that is necessary to maintain life 30 mA is more current than your nerves can generate so it will mask all your programmed activities. if your are standing on damp ground and touch 110V hot wire with your hand you can stop your heart and your lungs. if you pass your hand thru a 200amp arc you will probably loose the use of your hand maybe even permanently but not be killed
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