Document R63EQzLVYNbwyowzKv55newk

41--Electrical Hazards the loss immediately to your supervisor and get a new padlock Removing fuses When it is necessary to remove a fuse, the operating switch should be opened to re move the load and the fuse should be ex tracted with an insulated fuse puller If the fuse is not protected with a switch, the supply end of the fuse should be pulled out first When the fuse is replaced, the supply end should be put m first It is important that a fuse be replaced by one of the same type and size and that a cop per wire or- other conductor never be sub stituted For work on lines carrying over 600 volts, the sources of energy can be opened by trip ping the circuit breaker and then opening the disconnects The conductors should be tagged, and, if possible, a substantial grounded conductor should be clamped to each leg of the circuit before the work is started The gioundmg conductors should be removed just before the circuit is re energized As an added precaution, tests should be made with a voltmeter or other standard approved tester to make sure the circuit is clear In emergencies where the areas around fuse boxes are wet, wood platforms, insulated stools, or lubber boots should be used by maintenance woikers Wiring Electrical installations should be made in accordance with the National Electrical Code as a minimum standard, and each job should be pioperly inspected The use of temporary wiring should be discouraged even though it may be reasonably safe when first put m As a job progresses and repairs or installa tions are made, temporary wiring mav be come unsafe because it is not properly pro tected from mechanical injury Maintenance men should make it a prac tice to inspect plugs and connections on portable electric equipment to see that the thud wire frame ground is properlv con nected, the grounding prong has not been re moved, and the cord is properly connected to the terminals Where there is any doubt about the safe operation of a tool, it should 1284 be removed from service, tagged, and returned to the tool room for repairs When additional equipment is being in stalled or operated under temporary condi tions, no taps should be made into an existing circuit unless an individual switch is installed in the branch line, with provision being made for locking the switch "off" and tagging it Tliis precaution will prevent service interrup tions m the main circuit when power must be shut off in the branch circuit, and it will also prevent accidental starting of extra equipment that is tapped in Employee Training Few plants experience difficulty m selec tion and installation, but in maintenance and use of electrical equipment, deviation from safe practices is sometimes tolerated, with the usual result that unnecessary hazaids are created and men ai e injured and killed There fore, for maximum effectiveness, the safety program should include thorough training of all employees who work with the electrical installation of the plant or operate electrical equipment In addition to instructions on the hazards of electricity, employees should be trained m first aid, the use of warning signs, guards, and other protective devices, and in safe operational procedures It is essential that they be trained in the mouth-to-mouth method of i esuscitation and, in some cases, external cardiac massage The training program should be based on the plant's electrical system and applied spe cifically to plant operations Supervisors should be given such instruc tions as may be necessary to acquaint them with existing or probable electrical hazards, and they should be required to maintain close supervision over all operations which involve the use of electrical equipment They should encourage employees to report immediately anv electrical defects observed and this equip ment should be repaired or replaced at once It is recommended that members of the organization's safety department familiarize themselves with the codes and standards which apply to their equipment and operation and that someone from the electrical mainte nance staff be an active member of the plant safety committee