Laserfiche WebLink
■ When in use, oxygen cylinder valves will be opened fully and made hand-tight <br /> against the back seat This takes the high-range cylinder pressure off the packing <br /> ■ It is permissible to close torch valves alone only when work is briefly suspended <br /> and the operator is nearby Any other interruption of use (e g , if one cylinder <br /> becomes empty) necessitates closing the cylinder valves, followed promptly by <br /> opening the torch valves to purge lead-hoses and releasing the regulator screw <br /> 104 Electrical Safety <br /> 10 4 1 Design, Construction, and Use of Electrical Equipment <br /> 4 All electrical equipment shall be installed by qualified technicians according to <br />�} established standards or application-specific designs prepared by professional electrical <br /> engineers The following safety rules shall apply <br /> ■ All electrical equipment shall comply with NFPA70, National Electrical Code, <br /> and applicable local codes and regulations <br /> ■ All electrical equipment shall be operated according to manufacturer's <br /> instructions <br /> ■ The noncurrent-carrying metal parts of fixed, portable, or plug-connected <br /> equipment shall be grounded Portable tools and appliances protected by an <br /> approved system of double insulation need not be grounded <br /> ■ Extension cords shall be the three-wire type for grounded tools (two-wire is <br /> permissible for double insulated tools) and shall be protected from damage <br /> Cords shall not be fastened with staples or extend across an azsleway or walkway <br /> Worn or frayed cords shall not be used Cords shall not be run through doorways <br /> where the door could cut or damage it <br /> ■ Splices in all electrical cable shall have insulation equal to that of the cable <br /> ■ Exposed bulbs on temporary lights shall be guarded to prevent accidental contact, <br /> except where bulbs are deeply recessed in the reflectors Temporary lights shall <br /> not be suspended by their electric cords unless designed for this use <br /> ■ Receptacles for attachment plugs shall be of the approved, concealed, contact <br /> type Where different voltages, frequencies, or types of current are suppled, <br /> ` receptacles shall be of such design that attachment plugs are not interchangeable <br /> 1 0 <br /> 10-8 REV 4192-EGI <br />