A crew was working upgrading the battery room at a receiving substation. (The ro

Question

A crew was working upgrading the battery room at a receiving substation. (The room provided emergency power for up to 8 hours.) The electric utility had purchased replacement batteries from RSC in Wilmington, CA. Before starting work that day, the crew connected the newly purchased batteries in series. Two workers had requested insulated tools as well as appropriate personal protective equipment, such as gloves, barriers, and an insulated torque wrench. None could be provided on that day, but the employer allowed the work to continue. At about 1:00 p.m., after one worker had connected all the batteries in one rack in series, he made a cross-aisle connection to a second rack. As he was connecting the cross-aisle cable to the last battery on the upper level of the first rack, the other end of the cable dropped. It came too close to the exposed positive terminal of the last battery on the lower level of the same rack, causing an electrical fault. The ensuing electric arc burned the worker's rubber insulating gloves and melted his left glove into the middle and ring fingers of his left hand. He sustained second- and third-degree burns, requiring surgeries and hospitalization for several days. The employer had not trained its employees in the proper procedures for, and hazards of, working with wet cell batteries.

HAZARD DESCRIPTION/LOCATION. Describe briefly the hazard(s) which you believe exist. Include the approximate number of employees exposed to or threatened by each hazard. Specify the particular building or worksite where the alleged violation exists.

Keywords:   electrical, elec utility work, battery, electrical fault, electric arc, burn, elec protect equip, ppe, work rules, e ptd

HAZARD DESCRIPTION/LOCATION. Describe briefly the hazard(s) which you believe exist. Include the approximate number of employees exposed to or threatened by each hazard. Specify the particular building or worksite where the alleged violation exists.

Explanation / Answer

No of employee

exposed

It occurs when anyone comes in direct contact with high voltage lines. The electric current passes through the body.

It is caused when working person is struct by live open wire or any electric equipments or devices like electric motor or generator.

unprotected energized parts of electrical equipment

1 or more

or even surrounding areas

Hazard Name Hazard description

No of employee

exposed

Location Electrocusion

It occurs when anyone comes in direct contact with high voltage lines. The electric current passes through the body.

whoever comes in contact. anywhere where high voltage is there. Struck by

It is caused when working person is struct by live open wire or any electric equipments or devices like electric motor or generator.

1 or more In motor or generator unit DC source mishappening DC is most dangerous hence more prevention needed 1 DC battery system in power or sub-stations Insulation Failure failure of insulation by high currents 1 or more places where there is chance of high currents in wires like end sub station Arc Flash Hazard a type of electrical explosion or discharge that results from a low impedance connection through air to ground or another voltage phase in an electrical system. 1 or more or whole industry in places where switching is done often like power station Arc Blast pressure wave generated by arc flash complete industry in places where switching is done often like power station

unprotected energized parts of electrical equipment

energized parts may cause severe loss 1 or more places where capacitor banks are used like sub station or welding works Toxic gas from electric equipments many equipments results produce toxix gases which are harmful and may also cause death like while soldering.

1 or more

or even surrounding areas

industry dealing with high currents for the purpose of melting of metals and other things.

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