Page 14 - Tech handbook 2019 rev 6 whyperlinks

 Ensure all new electrical installations meet codes and regulations

Employees

 Report electrical deficiencies immediately
 Not work on electrical equipment unless authorized and trained
 Properly inspect all electrical equipment prior to use
 Unqualified employees shall maintain 10' for 50kV plus 4" for every additional
10kV
 Qualified employees shall adhere to approach distances in table:
Confidential and Proprietary
Voltage range (phase to phase) | Minimum approach distances
300V and less ....................| Avoid Contact
Over 300V, not over 750V .........| 1 ft. 0 in. (30.5cm).
Over 750V, not over 2kV ..........| 1 ft. 6 in. (46 cm).
Over 2kV, not over 15kV ..........| 2 ft. 0 in. (61 cm).
Over 15kV, not over 37kV .........| 3 ft. 0 in. (91 cm).
Over 37kV, not over 87.5kV .......| 3 ft. 6 in. (107 cm).
Over 87.5kV, not over 121kV ......| 4 ft. 0 in. (122 cm).
Over 121kV, not over 140kV .......| 4 ft. 6 in. (137 cm).

Hazard Control

Engineering Controls

 All electrical distribution panels, breakers, disconnects, switches, junction boxes
shall be completely enclosed

 Water tight enclosure shall be used where there is possibility of moisture entry
either from operations or weather exposure

 Electrical distribution areas will be guarded against accidental damage by locating in
specifically designed rooms, use of substantial guard posts and rails and other
structural means

 A clear approach and 3-foot side clearance shall be maintained for all distribution
panels.

 All conduit shall be fully supported throughout the entire length. Non-
electrical attachments to conduit is prohibited.

 All non-rigid cords shall be provided strain relief where necessary.

 Lines shall be deenergized and grounded or other protective measures shall be
provided before work is started.

 Any vehicle or mechanical equipment capable of having parts of its structure elevated
near energized overhead lines shall be operated so that a clearance of 10 ft. (305 cm) is
maintained. If the voltage is higher than 50kV, the clearance shall be increased 4 in. (10
cm) for every 10kV over that voltage.

6 | P a ge
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