ELECTRICAL HAZARDS

The following guidelines must be followed to prevent accidental contact with overhead electrical conductors and/or communication wires and cables. (Ref. ANSI Z133.1-1982)

All overhead conductors and all communications wires and cables are considered to be energized with poten- tially fatal voltages and must never be touched either di- rectly or indirectly. Accidental contact with any overhead conductors or communication wires and cables can re- sult in death or serious injury.

A close inspection shall be made by the tool opera- tor and by the tool operator’s supervisor to determine whether an electrical conductor passes through the tree or passes within reaching distance of the tool operator.

Only qualified tool operators shall be assigned to the

work if an electrical hazard exists.

A second qualified tool operator must be within normal

voice communication during line clearing operations aloft when the tool operator approaches closer than 10 feet (3 m) to any conductor or electrical apparatus ener- gized in excess of 750 volts, or when roping is required to remove the branches or limbs.

Tool operators must maintain the following clearances from energized conductors:

Voltage Range

Minimum Working

(phase-to-phase) (kV)

Distance

2.1–15.0

2 ft 0 in./0.6 m

15.1–35.0

2 ft 4 in./0.7 m

35.1–46.0

2 ft 6 in./0.75 m

46.1–72.5

3 ft 0 in./0.9 m

72.6–121.0

3 ft 4 in./1.0 m

138.0–145.0

3 ft 6 in./1.05 m

161.0–169.0

3 ft 8 in./1.1 m

230.0–242.0

5 ft 0 in./1.5 m

345.0–362.0

7 ft 0 in./2.1 m

500.0–552.0

11 ft 0 in./3.35 m

700.0–765.0

15 ft 0 in./4.55 m

All other tree workers must maintain a minimum clear- ance of 10 feet (3 meters) from energized conductors rated 50 kV phase-to-phase or less. Conductors rated over 50 kV phase-to-phase require a minimum clear- ance of 10 feet plus 4/10 of an inch (3 meters plus 10 mm) for each kilovolt over 50 kV.

When a lifting device contacts an electrical conductor,

the truck supporting the device is considered to be ener- gized and contact with the truck must be avoided except when emergency rescue procedures are being carried out. Emergency rescue should only be attempted by properly trained personnel familiar with electrical haz- ards.

Storm work and emergency conditions create special hazards. During these conditions, only authorized tool operators shall perform any tree operation.The follow- ing guidelines must be followed to prevent accidental contact with overhead electrical conductors and/or com- munication wires and cables. (Ref. ANSI Z133.1-2000)

Working in Proximity to Electrical Hazards:

An inspection shall be made by a qualified arborist to determine whether an electrical hazard exists before climbing, or otherwise entering, or performing work in or on a tree.

Only qualified line-clearance arborists or qualified line- clearance arborist trainees shall be assigned to work where an electrical hazard exists. Qualified line-clear- ance arborist trainees shall be under the direct supervi- sion of qualified line-clearance arborist.

A second qualified line-clearance arborists or line-clear- ance arborist trainees shall be within vision or voice communication during line-clearing operations aloft when line-clearance arborists or line-clearance arborist trainees must approach closer than 10 feet (3.05 me- ters) to any energized electrical conductor in excess of

750 volts (primary conductor) or when:

1.Branches or limbs being removed cannot first be cut (with a pole pruner/pole saw) to sufficiently clear electrical conductors, so as to avoid contact.

2.Roping is required to remove branches or limbs from such electrical conductors. This does not ap- ply to individuals working on behalf of, or employed by, electrical system owners/operators engaged in line-clearing operations incidental to their normal occupation.

Qualified line-clearance arborists and line-clearance arborist trainees shall maintain minimum approach dis- tances from energized electrical conductors in accor- dance with Table 1.

All other arborists shall maintain a minimum approach distance from energized electrical conductors in accor- dance with Table 2.

Branches hanging on an energized electrical conductor shall be removed using non-conductive equipment.

CR27 User Manual ◄ 7

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Stanley Black & Decker CR27 user manual Electrical Hazards, Voltage Range Minimum Working Phase-to-phase kV Distance
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CR27 specifications

The Stanley Black & Decker CR27 is a powerful and versatile tool that has been designed for both professional tradespeople and DIY enthusiasts. This cutting-edge product showcases a combination of advanced features and innovative technologies that make it a reliable choice for various projects.

One of the standout characteristics of the CR27 is its robust motor. With a maximum power capacity, this tool is engineered to handle demanding tasks with ease. Whether you're drilling through wood, metal, or drywall, the CR27 ensures maximum efficiency and performance.

The CR27 features an adjustable speed setting, providing users with the flexibility to tackle different materials and applications. The variable speed control allows for precise operation, making it easier to achieve the desired results. The tool's ergonomic design enhances comfort during prolonged use, reducing fatigue and increasing productivity.

Another highlight of the CR27 is its lightweight construction. This feature not only makes it easier to maneuver but also allows for extended periods of use without straining the user. The compact design ensures that the tool is easy to store and transport, making it perfect for jobsites or home use.

The CR27 is equipped with a rapid bit change system. This feature allows users to switch bits quickly, minimizing downtime and maximizing efficiency. The built-in LED work light illuminates dark work areas, ensuring visibility and precision even in poorly lit conditions.

Safety is a top priority with the CR27. The tool includes multiple safety features such as a lock-off switch to prevent accidental activation and an integrated overload protection system that safeguards the motor from damage during extreme use. These features make it a dependable choice for users.

Finally, the Stanley Black & Decker brand is synonymous with quality and reliability. The CR27 is backed by a strong warranty, providing users with peace of mind. With its combination of power, flexibility, and user-friendly design, the CR27 emerges as a top contender in the competitive market of power tools, perfect for any task that requires efficiency and durability.
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