Construction Industry Photos Standard –1926.954(j) Description –Grounding cables and attachments must be secured to equipment in such a manner as to maintain adequate grounding. The manner in which the grounding attachment was installed in this photo is not adequate.
Construction Industry Photos Standard –1926.950(d)(1)(iv) Description –Use of proper equipment for grounding de- energized power lines is paramount to protecting employees engaged in line construction and maintenance.
Construction Industry Photos Standard –1926.550(a)(15)(ii) Description –For lines rated over 50kv, minimum clearance between the lines and any part of the crane or load shall be 10 feet plus 0.4 inch for each 1kv over 50 kv.
Construction Industry Photos Standard –1926.416(a)(3) Description –Before work is begun the employer must ascertain that electrical circuits are not concealed behind walls or other locations in which contact can be made.
Wire Gauge Cords are offered in many lengths and are marked with a size or "gauge." The gauge is based on the American Wire Gauge (AWG) System, in which the larger the wire, the smaller the AWG number. For example, a 12 gauge wire would be larger, and can power larger wattage appliances, than a 14 gauge wire.
Wire Classes 12/3 means “12 gauge wire” and “/3” means that there are three wires in the cable UL indicates the wire has been certified by the Underwriters Laboratory to be safe SJ means “appliance cord, stranded conductors, cotton layer between wire and insulation, jute filler, rubber outer jacket, lighter service”. (S used by itself means extra hard service; SV is light service only.) T means load temperature must be less than 140 degrees F (in dry conditions). W means “wet use types”.
Construction Industry Photos Standard –1926.405(a)(2)(ii)(F) Description –Temporary lights will not be suspended by their cords unless they are designed for this purpose.