Saturday, September 13, 2008

Back To The Old House

Posted on/at 8:56 PM by Sparky


Well it was a good thing we put this conduit in, this panel comes out anyhow but we decided to run conduit to the location in case we had to re feed anything directly here after the new service is built in the basement. One of the other trades had a loader and hit the triplex that feeds this panel and it just so happens this panel is where all the temporary power is fed from for the time being. So with a little quick thinking we came up with a plan and simply used our conduit that runs to the new service location so we could re feed this panel instead of replacing a section of triplex that is getting removed anyhow.I think the guy running the machine was kind of spooked after he hit the triplex with good reason he is damn lucky.

Preventing Injuries When Working with Hydraulic Excavators and Backhoe Loaders

For lines rated 50 kV. or below, minimum clearance between the lines and any part of the crane or load shall be 10 feet;

1926.550(a)(15)(ii)

For lines rated over 50 kV., minimum clearance between the lines and any part of the crane or load shall be 10 feet plus 0.4 inch for each 1 kV. over 50 kV., or twice the length of the line insulator, but never less than 10 feet;

1926.550(a)(15)(iii)

In transit with no load and boom lowered, the equipment clearance shall be a minimum of 4 feet for voltages less than 50 kV., and 10 feet for voltages over 50 kV., up to and including 345 kV., and 16 feet for voltages up to and including 750 kV.

1926.550(a)(15)(iv)

A person shall be designated to observe clearance of the equipment and give timely warning for all operations where it is difficult for the operator to maintain the desired clearance by visual means;

..1926.550(a)(15)(v)

1926.550(a)(15)(v)

Cage-type boom guards, insulating links, or proximity warning devices may be used on cranes, but the use of such devices shall not alter the requirements of any other regulation of this part even if such device is required by law or regulation;

1926.550(a)(15)(vi)

Any overhead wire shall be considered to be an energized line unless and until the person owning such line or the electrical utility authorities indicate that it is not an energized line and it has been visibly grounded;

1926.550(a)(15)(vii)

Prior to work near transmitter towers where an electrical charge can be induced in the equipment or materials being handled, the transmitter shall be de-energized or tests shall be made to determine if electrical charge is induced on the crane. The following precautions shall be taken when necessary to dissipate induced voltages:

1926.550(a)(15)(vii)(a)

The equipment shall be provided with an electrical ground directly to the upper rotating structure supporting the boom; and

1926.550(a)(15)(vii)(b)

Ground jumper cables shall be attached to materials being handled by boom equipment when electrical charge is induced while working near energized transmitters. Crews shall be provided with nonconductive poles having large alligator clips or other similar protection to attach the ground cable to the load.

1926.550(a)(15)(vii)(c)

Combustible and flammable materials shall be removed from the immediate area prior to operations.

This is what osha has in regards to this sort of situation.



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